CN112343606B - Pipe jacking machine advanced grouting device capable of performing inclined grouting and grouting method - Google Patents
Pipe jacking machine advanced grouting device capable of performing inclined grouting and grouting method Download PDFInfo
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- CN112343606B CN112343606B CN202011261543.0A CN202011261543A CN112343606B CN 112343606 B CN112343606 B CN 112343606B CN 202011261543 A CN202011261543 A CN 202011261543A CN 112343606 B CN112343606 B CN 112343606B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 37
- 238000010276 construction Methods 0.000 claims abstract description 34
- 230000000149 penetrating effect Effects 0.000 claims abstract description 10
- 238000007569 slipcasting Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000012954 risk control Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Sewage (AREA)
Abstract
The invention relates to an advanced grouting device and a grouting method of a pipe jacking machine capable of performing inclined grouting, wherein the grouting device comprises the following components: the guide pipe is arranged obliquely to the section of the push bench, the first end of the guide pipe is fixed to the shell of the push bench through a fixing block, the second end of the guide pipe is fixed to the inside of the push bench through a fixing platform, a fixing hole for fixing the fixing block is formed in the shell, a positioning hole penetrating through the fixing hole is formed in the fixing block along the direction of the guide pipe, and the first end of the guide pipe is spliced in the positioning hole; the grouting pipe penetrates through the guide pipe, the first end of the grouting pipe penetrates out through the first end of the guide pipe, and the second end of the grouting pipe penetrates out through the second end of the guide pipe and is connected to grouting equipment. According to the invention, the advanced grouting device is arranged in the pipe pushing machine, so that the soil body at the front upper part of the pipe pushing machine can be reinforced in advance, the pipe pushing machine is in a stable state during the crossing period, and the pipe pushing construction risk is reduced.
Description
Technical Field
The invention relates to the field of underground tunnel construction, in particular to a push bench advanced grouting device capable of performing inclined grouting and a grouting method.
Background
Along with the development of the economy and the increase of the demand of infrastructure in China, the ultra-large section jacking pipe method technology is applied to long distance, shallow soil covering and various complex strata, and needs to downwards penetrate or laterally penetrate a plurality of important municipal pipelines or facilities such as operated rail transit and the like in the urban underground space in the construction. The construction of the ultra-large section pipe jacking method has higher and higher requirements on the sedimentation control of the earth surface and underground structure buildings along with the complexity of geological conditions and surrounding environments.
When the pre-protection measures cannot be taken on the bad soil or the building to be penetrated, the conventional pipe pushing machine equipment does not have an advanced grouting device, the stability of the pipe pushing machine equipment is checked in advance according to the past construction experience, a high-soil pressure pushing mode is mainly adopted in the past, the soil output is controlled to control the stability of a tunnel face, so that the pipe pushing machine body can quickly penetrate the bad soil or the building to be penetrated, and the disturbance period is shortened as much as possible. However, under the condition of limited surrounding environment, protective measures are actively taken for poor soil or underground construction buildings, and potential risks can exist.
Disclosure of Invention
In order to solve the problems, the advanced grouting device is arranged in the pipe jacking machine, so that soil body on the front upper side of the pipe jacking machine can be improved or reinforced in advance in jacking construction, the soil body is in a stable state during crossing, and the risk control capability of pipe jacking construction is improved.
The invention is realized by the following technical scheme: an advance grouting device of a pipe push bench capable of performing inclined grouting is used for grouting into soil in front of a pipe push bench body, and the advance grouting device of the pipe push bench comprises:
the guide pipe is arranged obliquely to the section of the push bench, the first end of the guide pipe is fixed to the shell of the push bench through a fixing block, the second end of the guide pipe is fixed to the inside of the push bench through a fixing platform, a fixing hole for fixing the fixing block is formed in the shell, a positioning hole penetrating through the fixing hole is formed in the fixing block along the direction of the guide pipe, and the first end of the guide pipe is spliced in the positioning hole;
the grouting device comprises a grouting pipe penetrating through the guide pipe, wherein a first end of the grouting pipe penetrates out through the first end of the guide pipe, and a second end of the grouting pipe penetrates out through the second end of the guide pipe and is connected to grouting equipment.
The advanced grouting device of the push bench can improve or strengthen the soil body at the front upper part of the push bench in advance in jacking construction, so that the push bench is in a stable state during crossing, spiral machine gushing possibly caused by push bench construction in sandiness and other easily-liquefying stratum can be effectively avoided or reduced, meanwhile, for the limit surrounding environment condition of a downward-crossing underground structure, the bottom of the underground structure can be strengthened before crossing, construction risk control in crossing stage is greatly improved, protection efficiency of the underground structure is improved, and the push bench is simple in structure and convenient to assemble and disassemble.
The invention relates to a further improvement of an advanced grouting device of a pipe jacking machine capable of performing inclined grouting, which comprises the following steps: the fixed block is embedded in the fixed hole, and comprises a first surface parallel to the opening of the fixed hole, a second surface and a third surface which are obliquely inserted into the fixed hole, wherein the first surface, the second surface and the third surface are surrounded to form a triangular column structure, the second surface is perpendicular to the guide tube, the third surface is parallel to the guide tube, and the positioning hole penetrates through the first surface from the second surface.
The invention relates to a further improvement of an advanced grouting device of a pipe jacking machine capable of performing inclined grouting, which comprises the following steps: the positioning hole is internally provided with an internal thread, and the first end of the guide tube is provided with an external thread matched with the internal thread.
The invention relates to a further improvement of an advanced grouting device of a pipe jacking machine capable of performing inclined grouting, which comprises the following steps: the guide pipe inclines from the second end to the first end to the jacking direction of the push bench.
The invention relates to a further improvement of an advanced grouting device of a pipe jacking machine capable of performing inclined grouting, which comprises the following steps: the number of the guide pipes is multiple, and the first ends of the guide pipes are fixed on the upper part of the shell of the push bench in a dispersing manner along the circumferential direction of the push bench.
The invention relates to a further improvement of an advanced grouting device of a pipe jacking machine capable of performing inclined grouting, which comprises the following steps: the number of the fixed platforms is multiple, the fixed platforms are fixed with the guide pipes in one-to-one correspondence, and the fixed platforms are fixed in the shell of the push bench through fixing frames.
The invention relates to a further improvement of an advanced grouting device of a pipe jacking machine capable of performing inclined grouting, which comprises the following steps: the grouting device comprises a fixing platform, and is characterized in that a pushing assembly used for penetrating the grouting pipe into the guide pipe section by section is arranged on the fixing platform, the pushing assembly comprises a guide rail arranged along the direction of the guide pipe and a push rod reciprocating along the guide rail, the bottom of the guide rail is fixed with the fixing platform, and the second end of the guide pipe is fixed with the first end of the guide rail and is opposite to the push rod.
The invention also provides an advanced grouting method of the pipe push bench, which adopts the advanced grouting device of the pipe push bench to perform advanced grouting on soil in front of the pipe push bench body.
The invention relates to a further improvement of an advanced grouting method of a pipe jacking machine capable of performing inclined grouting, which comprises the following steps:
s1, positioning a pipe jacking machine provided with the advanced grouting device of the pipe jacking machine;
s2, jacking construction is carried out, and the stability of surrounding soil mass is monitored in real time;
s3, if the stability of the surrounding soil body does not meet the construction requirement, stopping jacking construction and grouting the soil body in front of the push bench body by utilizing the push bench advanced grouting device;
s4, returning to the step S2.
Drawings
FIG. 1 is a schematic diagram showing the installation state of the advanced grouting device of the pipe jacking machine capable of performing inclined grouting.
Fig. 2 is a schematic diagram showing a connection state of a guide pipe and a fixed block in the advanced grouting device of the pipe jacking machine capable of performing inclined grouting.
FIG. 3 is a plan view of grouting holes in the advanced grouting device of the pipe jacking machine capable of performing inclined grouting.
Fig. 4 is a schematic diagram showing an installation state of a fixed platform in the advanced grouting device of the pipe jacking machine capable of performing inclined grouting.
Fig. 5 is a schematic structural view of a pushing assembly in the advanced grouting device of the pipe jacking machine capable of performing inclined grouting.
Detailed Description
When the pre-protection measures cannot be taken on the bad soil or the building to be penetrated, the conventional pipe pushing machine equipment does not have an advanced grouting device, the stability of the pipe pushing machine equipment is checked in advance according to the past construction experience, a high-soil pressure pushing mode is mainly adopted in the past, the soil output is controlled to control the stability of a tunnel face, so that the pipe pushing machine body can quickly penetrate the bad soil or the building to be penetrated, and the disturbance period is shortened as much as possible. However, under the condition of limited surrounding environment, protective measures are actively taken for poor soil or underground construction buildings, and potential risks can exist. According to the invention, the advanced grouting device is arranged in the pipe pushing machine, so that soil body on the front upper side of the pipe pushing machine can be improved or reinforced in advance in jacking construction, the pipe pushing machine is in a stable state during crossing, and the risk control capability of pipe pushing construction is improved.
The advanced grouting device of the pipe jacking machine capable of performing inclined grouting is further described below with reference to the accompanying drawings:
referring to fig. 1 and 2, fig. 1 is a schematic view showing an installation state of a push bench advanced grouting device capable of performing inclined grouting, and fig. 2 is a schematic view showing a connection state of a guide pipe and a fixed block in the push bench advanced grouting device capable of performing inclined grouting.
An advanced grouting device of a pipe push bench capable of performing inclined grouting is used for grouting into soil in front of a pipe push bench body, and the advanced grouting device of the pipe push bench comprises:
the guide pipe 20 is arranged obliquely to the section of the push bench 10, a first end of the guide pipe 20 is fixed on a shell of the push bench 10 through a fixing block 30, a second end of the guide pipe 20 is fixed inside the push bench 10 through a fixing platform 40, a fixing hole for fixing the fixing block 30 is formed in the shell, a positioning hole 31 penetrating through the fixing hole is formed in the fixing block 30 along the direction of the guide pipe 20, and the first end of the guide pipe 20 is spliced in the positioning hole 31;
the grouting pipe 50 is arranged in the guide pipe 20 in a penetrating way, the first end of the grouting pipe 50 penetrates out through the first end of the guide pipe 20, and the second end of the grouting pipe 50 penetrates out through the second end of the guide pipe 20 and is connected with grouting equipment.
Specifically, the fixing block 30 is fixed on the top of the front casing of the push bench 10, the fixing platform 40 is fixed inside the rear casing of the push bench 10, and the fixing platform 40 is provided with a supporting inclined plane with the same inclination angle as the guiding pipe 20, and the first end of the guiding pipe 20 is inserted into the positioning hole 31, so that the second end of the guiding pipe 20 is fixed on the supporting inclined plane, and the guiding pipe 20 is kept inclined from the second end to the first end in the jacking direction (i.e. forward and upward) of the push bench 10, so as to ensure that the grouting pipe 50 can perform grouting to a local soil body in front and upward of the push bench 10 in the push bench 10.
The advanced grouting device of the push bench can improve or strengthen the soil body at the front upper part of the push bench in advance in jacking construction, so that the push bench is in a stable state during crossing, spiral machine gushing possibly caused by push bench construction in sandiness and other easily-liquefying stratum can be effectively avoided or reduced, meanwhile, for the limit surrounding environment condition of a downward-crossing underground structure, the bottom of the underground structure can be strengthened before crossing, construction risk control in crossing stage is greatly improved, protection efficiency of the underground structure is improved, and the push bench is simple in structure and convenient to assemble and disassemble.
As a preferred embodiment: as shown in fig. 2, the fixing block 30 is embedded in the fixing hole, and includes a first surface 32 parallel to the opening of the fixing hole, a second surface 33 and a third surface 34 obliquely inserted into the fixing hole, wherein the first surface 32, the second surface 33 and the third surface 34 enclose a triangular column structure, the second surface 33 is perpendicular to the guiding tube 20, the third surface 34 is parallel to the guiding tube 20, and the positioning hole 31 penetrates from the second surface 33 to the first surface 32.
Through the setting of the fixed block of above-mentioned structure, on the one hand increased the area of contact with this stand pipe 20, make this stand pipe 20 fixed more reliable to make the slip casting direction can keep stable, and then guarantee slip casting quality. On the other hand, by providing the second surface 33 and the third surface 34 perpendicular and parallel to the guide pipe 20, respectively, the guide pipe 20 can apply a component force to the fixing block 30 by the grouting pressure to protect the housing of the push bench 10.
Further: the positioning hole 31 is internally provided with an internal thread, and the first end of the guide tube 20 is provided with an external thread matched with the internal thread. By adopting the threaded connection mode, on one hand, the guide tube 20 is convenient to disassemble and assemble, and on the other hand, the insertion depth of the guide tube 20 is convenient to adjust.
As a preferred embodiment: referring to fig. 3 and 4, fig. 3 is a plan view showing grouting holes in a push bench advanced grouting device capable of performing inclined grouting, and fig. 4 is a schematic view showing an installation state of a fixing platform in the push bench advanced grouting device capable of performing inclined grouting. The number of the guide pipes 20 is plural, and the first ends of the plurality of guide pipes 20 are fixed to the upper part of the housing of the push bench 10 in a dispersed manner along the circumferential direction of the push bench 10.
Specifically, the number of the guide pipes 20 is 4, and correspondingly, the number of the fixing blocks 30 and the fixing platforms 40 for fixing the guide pipes 20 is four, and the fixing blocks and the fixing platforms are fixed in a one-to-one correspondence with the four guide pipes 20. The four fixing blocks 30 are symmetrically distributed on the upper part of the front shell of the push bench 10 by taking the axis of the push bench 10 as a central line, and the four positioning holes incline outwards from the middle to two sides relatively so as to enlarge the grouting range. The four fixing platforms 40 are fixed in the shell of the push bench 10 through a fixing frame 41, the fixing frame 41 comprises two opposite vertical frames and a transverse frame fixedly connected between the bottom ends of the two vertical frames, the four fixing platforms 40 are uniformly arranged on the transverse frame at intervals, and the top ends of the two vertical frames are fixed with the top of the rear shell of the push bench 10 through bolts. The bolt fixing mode is selected, on one hand, the fixing frame 41 is convenient to assemble and disassemble, on the other hand, the fine adjustment of the fixing position of the fixing frame 41 can be realized by adjusting the screwing depth of the bolt, and then the purpose of fine adjustment of the heights of the four fixing platforms 40 is achieved, so that the inclination angle of the guide tube 20 is ensured.
As a preferred embodiment: referring to fig. 1 and 5, fig. 5 shows a schematic structural diagram of a pushing assembly in a push bench advanced grouting device capable of performing inclined grouting. The fixed platform 40 is provided with a pushing component 60 for penetrating the grouting pipe 50 into the guide pipe 20 section by section, the pushing component 60 comprises a guide rail 61 arranged along the direction of the guide pipe 20 and a push rod 62 reciprocating along the guide rail 61, the bottom of the guide rail 61 is fixed with the fixed platform 40, and the second end of the guide pipe 20 is fixed with the first end of the guide rail 61 and is opposite to the push rod 62.
Specifically, since the internal space of the push bench 10 is limited, it is inconvenient to insert the long grouting pipe 50 into the guide pipe 20, so in this embodiment, the grouting pipe 50 has a segmented structure, and the grouting pipe 50 is inserted segment by adopting the pushing assembly, so as to realize the insertion and the continuous connection of the grouting pipe 50. Specifically, a connecting flange 63 is fixed at one end of the guide rail 61 near the guide pipe 20, and a second end of the guide pipe 20 is in butt joint with the connecting flange 63, so that a port of the second end of the guide pipe 20 and a movement track of the ejector rod 62 are on the same straight line, and the ejector rod 62 can push the grouting pipe 50 into the guide pipe 20.
The following procedure of the grouting pipe 50 is as follows: when the ejector rod 62 moves to the point B, a section of grouting pipe is placed at the section A-B on the guide rail 61; then the section of grouting pipe is pushed into the opposite guide pipe 20 along with the process that the ejector rod 62 moves from the point B to the point A; then the ejector rod 62 is moved to the point B, and the next section of grouting pipe is placed; repeating the steps until the first section of grouting pipe passes out to the first end of the guide pipe 20 (i.e. passes out to the outside of the push bench 10); the last section of grouting pipe is then communicated with grouting equipment.
Preferably, a ball valve 64 is further connected between the guide pipe 20 and the connecting flange 63, and the ball valve 64 can automatically control whether the grouting pipe 50 is grouted, so as to selectively perform advanced grouting according to actual construction requirements. The guide rail 61 is pivotally connected to a link mechanism 65 for adjusting the angle of the guide rail, and the angle of the guide rail 61 can be adjusted by the link mechanism 65, so that fine adjustment of ±15 degrees of the inclination angle of the guide pipe 20 can be achieved.
The invention also provides an advanced grouting method of the pipe push bench capable of performing inclined grouting, which adopts the advanced grouting device of the pipe push bench to perform advanced grouting on soil in front of the pipe push bench body.
Specifically, the method comprises the following steps:
s1, positioning a pipe jacking machine provided with the advanced grouting device of the pipe jacking machine;
s2, jacking construction is carried out, and the stability of surrounding soil mass is monitored in real time;
s3, stopping jacking construction and grouting the soil in front of the push bench body by utilizing the push bench advanced grouting device if the stability of the surrounding soil does not meet the construction requirement;
step S4, returning to step S2.
Specifically, the construction environment of the push bench generally includes two types, one is that an underground structure building is not required to be traversed, and the other is that an underground structure building is required to be traversed, but in any case, when the push bench is in a limit traversing environment (namely, a poor soil body is traversed or an underground structure building with a complex structure is traversed), in order to ensure the stability of surrounding soil bodies or underground structure buildings during traversing and reduce the traversing construction risk, a pre-protection structure is preferably arranged around a channel to be traversed before the push bench performs jacking construction. However, for the situation that the pre-protection structure cannot be set, the advanced grouting device of the push bench in the embodiment can be adopted to improve or strengthen the soil body at the front upper part of the push bench in advance, so that the soil body is in a stable state during crossing, the control capability of the push bench construction risk is improved, the spiral machine gushing possibly caused by the push bench construction in the easily-liquefying stratum such as sandiness can be effectively avoided or reduced, meanwhile, for the situation of the limit surrounding environment of the underground structure building to be penetrated down, the bottom of the underground structure building can be reinforced before crossing, the construction risk control in the crossing stage is greatly improved, the protection efficiency of the underground structure building is improved, and the push bench is simple in structure and convenient to disassemble and assemble.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the invention, which is defined by the appended claims.
Claims (8)
1. The utility model provides a push bench advanced grouting device of tiltable slip casting for to the slip casting in the soil body in push bench fuselage place ahead, its characterized in that includes:
the pipe jacking device comprises a guide pipe, a fixing block, a fixing platform, a supporting inclined plane, a fixing hole and a positioning hole, wherein the guide pipe is arranged on the section of the pipe jacking machine and is inclined to the section of the pipe jacking machine, a first end of the guide pipe is fixed to a shell of the pipe jacking machine through the fixing block, a second end of the guide pipe is fixed to the inner portion of the pipe jacking machine through the fixing platform, a supporting inclined plane consistent with the inclination angle of the guide pipe is arranged on the fixing platform, the second end of the guide pipe is fixed to the supporting inclined plane, a fixing hole for fixing the fixing block is formed in the shell, a positioning hole penetrating through the fixing hole is formed in the fixing block along the direction of the guide pipe, and the first end of the guide pipe is spliced in the positioning hole;
the grouting device comprises a grouting pipe penetrating through the guide pipe, wherein a first end of the grouting pipe penetrates out through the first end of the guide pipe, and a second end of the grouting pipe penetrates out through the second end of the guide pipe and is connected with grouting equipment;
the grouting pipe is of a segmented structure: the fixing platform is provided with a pushing component for penetrating the grouting pipe into the guide pipe section by section, the pushing component comprises a guide rail arranged along the direction of the guide pipe and a push rod which reciprocates along the guide rail, the bottom of the guide rail is fixed with the fixing platform, and the second end of the guide pipe is fixed with the first end of the guide rail and is opposite to the push rod; a connecting flange is fixed at one end of the guide rail, which is close to the guide pipe, and the second end of the guide pipe is in butt joint with the connecting flange, so that the port of the second end of the guide pipe and the movement track of the ejector rod are on the same straight line;
the fixed platform is fixed in through the mount in the casing of push bench, the mount includes two perpendicular framves that set up relatively and fixed connection two perpendicular frame between the frame bottom, the fixed platform install in on the crossbearer, two perpendicular frame pass through the bolt with the back casing top of push bench is fixed.
2. The tilt-grouting advance grouting device of the push bench, according to claim 1, is characterized in that: the fixed block is embedded in the fixed hole, and comprises a first surface parallel to the opening of the fixed hole, a second surface and a third surface which are obliquely inserted into the fixed hole, wherein the first surface, the second surface and the third surface are surrounded to form a triangular column structure, the second surface is perpendicular to the guide tube, the third surface is parallel to the guide tube, and the positioning hole penetrates through the first surface from the second surface.
3. The tilt-grouting advance grouting device of the push bench, according to claim 1, is characterized in that: the positioning hole is internally provided with an internal thread, and the first end of the guide tube is provided with an external thread matched with the internal thread.
4. The tilt-grouting advance grouting device of the push bench, according to claim 1, is characterized in that: the guide pipe inclines from the second end to the first end to the jacking direction of the push bench.
5. The tilt-grouting advance grouting device of the push bench, according to claim 4, is characterized in that: the number of the guide pipes is multiple, and the first ends of the guide pipes are fixed on the upper part of the shell of the push bench in a dispersing manner along the circumferential direction of the push bench.
6. The tilt-grouting advance grouting device of the push bench, according to claim 5, is characterized in that: the number of the fixed platforms is multiple, and the fixed platforms are fixed with the guide pipes in one-to-one correspondence.
7. A push bench advanced grouting method capable of performing inclined grouting is characterized in that:
an advanced grouting device of a push bench according to any one of claims 1-6 is used for advanced grouting of soil in front of a push bench body.
8. The tilt-grouting advance grouting method of the push bench according to claim 7, comprising the steps of:
s1, positioning a pipe jacking machine provided with the advanced grouting device of the pipe jacking machine;
s2, jacking construction is carried out, and the stability of surrounding soil mass is monitored in real time;
s3, if the stability of the surrounding soil body does not meet the construction requirement, stopping jacking construction and grouting the soil body in front of the push bench body by utilizing the push bench advanced grouting device;
s4, returning to the step S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011261543.0A CN112343606B (en) | 2020-11-12 | 2020-11-12 | Pipe jacking machine advanced grouting device capable of performing inclined grouting and grouting method |
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| CN202011261543.0A CN112343606B (en) | 2020-11-12 | 2020-11-12 | Pipe jacking machine advanced grouting device capable of performing inclined grouting and grouting method |
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| CN112343606B true CN112343606B (en) | 2023-10-13 |
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| CN210598997U (en) * | 2019-07-03 | 2020-05-22 | 中铁隧道股份有限公司 | A slip casting pipe and leading slip casting system for shield constructs quick-witted advance slip casting |
| CN111365011A (en) * | 2020-04-18 | 2020-07-03 | 中铁工程装备集团有限公司 | Shield tunneling machine with function of rapidly freezing tunnel face and construction method |
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