CN219654701U - Grouting structure for jack-up shaft hole of pipe jacking construction - Google Patents
Grouting structure for jack-up shaft hole of pipe jacking construction Download PDFInfo
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- CN219654701U CN219654701U CN202320497638.5U CN202320497638U CN219654701U CN 219654701 U CN219654701 U CN 219654701U CN 202320497638 U CN202320497638 U CN 202320497638U CN 219654701 U CN219654701 U CN 219654701U
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- jacking
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 64
- 239000002002 slurry Substances 0.000 claims abstract description 55
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004513 sizing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a grouting structure for a vertical shaft hole in pipe jacking construction, wherein an annular space is formed between a hole formed by jacking when a machine head of a pipe jacking advances and a pipe joint of the pipe jacking; a grouting pump is arranged on the ground outside the vertical shaft, and an outlet of the grouting pump is connected with a grouting hose; the rear part of the annular space is provided with a soil body reinforcing area around the annular space; the front end of the soil body well wall area is pre-buried and provided with an annular pipe surrounding the annular space, the annular pipe is provided with a slurry outlet, and the slurry outlet is communicated with the annular space; the annular pipe is connected with a grouting interface through a connecting pipe, the grouting interface is fixed on the wall of the vertical shaft and is connected with a grouting hose, and an annular sealing device for the opening is arranged around the annular space at the opening. According to the utility model, by arranging the soil body reinforcing area, the problem that soil body slumps due to the fact that the pressure at the grouting opening is continuously excessive, so that blockage is avoided, the problems that a sizing film at the rear section of an annular space is insufficient, the friction force between a pipe joint and the soil body is increased are avoided, the energy consumption of a vertical shaft internal jacking device is reduced, and the distance that the same jacking device jacks into a jacking pipe is longer.
Description
Technical Field
The utility model relates to the technical field of pipe jacking construction, in particular to a grouting technology in pipe jacking construction.
Background
In the utility model, the jacking direction of the jacking pipe is taken as the forward direction.
The basic structure of the pipe jacking construction is that the front end of a pipe joint 1 of the pipe jacking is connected with and jacks a machine head, and the machine head is provided with a rotatable cutterhead forwards. When the pipe jacking construction is performed, a vertical shaft is needed, a cutter disc and a machine head are placed in a hole in the jacking direction (approximately horizontal direction) in the vertical shaft, the machine head is jacked into the soil by jacking equipment in the vertical shaft, a subsequent pipe section 1 of the pipe jacking is hoisted into the vertical shaft, the pipe section 1 is jacked forward by the jacking equipment in the vertical shaft, after the previous pipe section 1 is jacked forward in place, the jacking equipment is retracted, and the next pipe section 1 of the pipe jacking is hoisted. And continuously jacking the pipe joint 1 forwards to perform pipe jacking construction.
As shown in fig. 1, in the pipe jacking construction, the nose is larger than the diameter of the pipe section 11 (pipe section 11 of the pipe jacking), for example, by 4 cm, and when the nose is jacked in, a hole 2 with the same diameter is formed, and an annular space 6 (2 cm) is formed between the inner wall of the hole 2 and the outer wall of the pipe section 11.
If the annular space 6 is not filled, peripheral soil body can be extruded onto the pipe body under the action of soil stress (active soil pressure), so that the soil body friction force in the jacking process of the pipeline (a plurality of pipe joints 11 of the jacking pipe) is greatly increased, the energy consumption of jacking equipment in the construction of the jacking pipe is greatly increased, and the jacking distance of the specific jacking equipment is shortened.
The maximum jacking pressure of the specific jacking equipment is fixed, while the friction force between the pipe section 11 of the jacking pipe and the peripheral soil body or slurry is continuously increased along with the extension of the jacking distance, namely the extension of the pipe section 11, and when the friction force reaches the maximum jacking pressure of the specific jacking equipment, the (pipe section 11 of the) jacking pipe cannot be continuously jacked forward.
Therefore, grouting lubrication is needed for the annular space 6, so that the power consumption of the jacking equipment in unit jacking distance is reduced, and the maximum jacking distance of the jacking equipment is prolonged.
The above-mentioned annular space 6 is grouting lubricated, in the prior art, grouting is performed in the annular space at the machine head, and along with the increase of the number of pipe joints 1 and the extension of the pipeline, the length of the annular space 6 is longer and longer. The pressure in the annular space 6 close to the machine head is higher, the pressure in the annular space 6 far away from the machine head is lower (the friction force of soil body which needs to be overcome when the pipe joint 1 advances is larger due to insufficient serosa), so that the annular space 6 far away from the machine head needs to be supplemented with serosity.
The grouting can not replace grouting, and the grouting solves the problem that grouting is full of slurry to form preset pressure when no slurry exists in the annular space; the problem aimed at by the paste supplementing is that: in the pipe jacking construction process, as time goes on and the pipe jacking advances, the slurry pressure in the annular space outside the pipe joint 1 can be gradually reduced due to diffusion into soil and the like; that is, the problem to be solved by the slurry filling is not that the slurry is filled to form a preset pressure when no slurry exists, but that the slurry pressure is maintained after the slurry exists, the slurry filling amount is far smaller than the slurry filling amount, and the slurry filling equipment cannot support the slurry amount required by the slurry filling.
Therefore, it is necessary to develop a technique of grouting also at the rear end of the annular space, i.e., at the shaft, so as to avoid the problem that the slurry amount at the rear end of the annular space cannot be ensured after the rear end of the annular space is further and further from the head as the pipe section 1 of the jacking pipe is spliced longer.
Grouting is also performed at the rear end of the annular space, i.e. at the shaft, and the inventor has faced the problem in the test that the rear end of the annular space 6 (adjacent to the wall of the shaft) is prone to collapse and clog when encountering slurry under pressure, where grouting occurs and the wall of the shaft is prone to collapse and clog the grouting passage. Meanwhile, the sealing of the hole is also a problem, and if the sealing is not in place, the slurry easily enters the vertical shaft to influence the normal work.
The utility model aims to solve the technical problems on the basis of original grouting near the machine head, provides a shaft hole grouting structure, and solves the problem of insufficient slurry quantity at the rear part of an annular space caused by grouting near the machine head.
Disclosure of Invention
The utility model aims to provide a grouting structure for a vertical shaft hole in pipe jacking construction, and aims to provide a grouting structure for the vertical shaft hole in pipe jacking construction, which is used for avoiding the problem of insufficient rear grouting amount in an annular space by grouting the rear end of the annular space.
In order to achieve the purpose, the grouting structure for the hole of the jacking pipe construction vertical shaft comprises a jacking pipe which extends into the soil body from the wall of the vertical shaft, wherein the jacking pipe is formed by assembling a plurality of pipe joints, a machine head is arranged at the front end of the jacking pipe, the diameter of the machine head is larger than that of the pipe joints, and an annular space is formed between a hole pressed by the machine head when the machine head advances and the pipe joints; a grouting pump is arranged on the ground outside the vertical shaft, the inlet of the grouting pump is connected with a slurry stirring device, the outlet of the grouting pump is connected with a grouting hose, and an opening on the wall of the vertical shaft where the machine head enters the soil is called a hole;
the diameter of the machine head is larger than that of a pipe joint of the jacking pipe, a hole with the same size as the diameter of the machine head is formed when the machine head is jacked in, and an annular space is formed between the inner wall of the hole and the outer wall of the pipe joint;
the rear part of the annular space is provided with a soil body reinforcing area around the annular space through grouting, and the soil body reinforcing area is positioned 50-100 cm in front of the hole;
the soil body behind the soil body reinforcing area is called a soil body well wall area; the front end of the soil body well wall area is pre-buried and provided with an annular pipe surrounding the annular space, the annular pipe is provided with a slurry outlet, and the slurry outlet is communicated with the annular space; the annular pipe is connected with a grouting interface through a connecting pipe, the grouting interface is fixed on the wall of the vertical shaft and is connected with a grouting hose, the grouting pump is arranged on the ground, and the inlet of the grouting pump is connected with a slurry stirring device;
the hole is surrounded by an annular space and is provided with a hole annular sealing device which is a rubber ring or an annular steel plate water stop belt.
The slurry outlet is uniformly provided with a plurality of slurry outlets along the circumferential direction of the annular pipe.
A second annular sealing device is arranged in the annular space, and the second annular sealing device is a rubber ring or an annular steel plate water stop belt; the second annular sealing device corresponds to the middle position of the soil body well wall area in the front-back direction and is positioned behind the annular pipe.
The grouting interface is provided with an electronic flowmeter and a pressure sensor, an electric control device connected with the grouting pump is arranged on the ground or in the vertical shaft, the electric control device is connected with the electronic flowmeter and the pressure sensor, and the electric control device is connected with a display screen.
The grouting interfaces are uniformly arranged around the hole, and each grouting interface is communicated with the annular pipe through a connecting pipe; the number of grouting interfaces is one third to one half of the number of grouting ports.
The utility model has the following advantages:
according to the utility model, by arranging the soil body reinforcing area, the problem that soil body slumps and is blocked due to the fact that the pressure at the grouting opening is continuously excessive is avoided, the main problem that the front end grouting technology cannot shift a value to the rear end grouting is solved, the problems that the rear section of an annular space is insufficient in size film and the friction force between a pipe joint 1 and soil body is increased are avoided, the energy consumption of a jacking device for jacking the pipe joint 1 of a jacking pipe in a vertical shaft is reduced, and the distance that the same jacking device jacks the pipe is longer (because the friction force between the single pipe joint 1 and the soil body is reduced, the friction force between the longer pipe joint and the soil body is matched with the maximum jacking pressure of the jacking device).
By providing an annular sealing device for the opening, the slurry is prevented from flowing back into the shaft. The grouting interface is used as a connecting structure of the soil inner structure and the soil outer structure, can be continuously connected with the soil body structure (the annular pipe and the connecting pipe), and can be conveniently connected with or separated from the pipe outer structure (the grouting hose).
The grouting holes can be used for grouting the annular space more uniformly, so that grouting films at all positions of the inner circumference of the annular space are more uniform, and further friction force between the pipe joint 1 and a soil body is lower when the pipe joint advances.
The second annular sealing device and the hole annular sealing device form two seals, so that slurry is better prevented from entering the vertical shaft under the action of pressure.
The staff can monitor grouting pressure and grouting amount conveniently through the display screen in the ground or the vertical shaft, and the working state of the grouting pump is correspondingly adjusted.
The number of grouting interfaces is not required to be the same as that of the grouting ports, and even if only one half to one third of the number of the grouting ports is needed, the grouting ports can be provided with uniform grouting pressure. A relatively small number facilitates manufacturing and installation connections.
Drawings
Fig. 1 is a schematic view of the structure of the annular space 6 between the pipe section 11 and the hole 2;
FIG. 2 is a schematic diagram of the structure of the present utility model; in fig. 2, for simplicity of the drawing, the grouting pump and the slurry stirring device are drawn on the ground in the jacking direction of the shaft, and in practice, the ground in the jacking direction can be avoided by the placement position of the ground equipment.
Fig. 3 is a schematic view of the structure of the front surface of the annular tube.
Fig. 4 is a schematic view of the structure of the rear surface of the annular tube.
Fig. 5 is an enlarged view at a in fig. 2.
Fig. 6 is a schematic view of the structure of the present utility model with the ground equipment removed, with the push pipes pushed forward a distance.
The annular tube is shown in fig. 2 at the front end of the tube section 1 because the top tube is just in place in fig. 2, and has not yet been pushed forward a significant distance; when the head and the top tube are advanced a distance, the annular space extends forward, and the annular tube position in fig. 2 is located at the rear of the top tube, i.e. the rear of the annular space.
The drawings are schematic representations, not necessarily to scale, of the structures and principles of the utility model.
Detailed Description
As shown in fig. 1 to 6, the grouting structure for the opening of the jacking pipe construction vertical shaft comprises a jacking pipe which extends into the soil body from the wall 4 of the vertical shaft (along the basically horizontal direction), wherein a jacking device for jacking the jacking pipe forwards is arranged in the vertical shaft, and the jacking direction of the jacking pipe is taken as the forward direction. The pipe jacking is formed by splicing a plurality of pipe joints 1, a machine head 5 is arranged at the front end of the pipe jacking, and a cutter head for rotationally cutting soil bodies and breaking up hard objects such as stone blocks in the soil bodies is arranged at the front end of the machine head 5; the cutterhead is a conventional technology and is not shown in the figure; the diameter of the machine head 5 is larger than that of the pipe joint 1, and an annular space 6 is formed between a hole pressed out by the machine head 5 when the machine head advances and the pipe joint 1; a grouting pump 7 is arranged on the ground outside the vertical shaft, the inlet of the grouting pump 7 is connected with a slurry stirring device, the outlet of the grouting pump 7 is connected with a grouting hose 8, and an opening on the vertical shaft wall 4 of the earth-entering part of the machine head 5 is called a hole;
the diameter of the machine head 5 is larger than that of the pipe joint 1 of the jacking pipe, a hole with the same size as the diameter of the machine head 5 is formed when the machine head 5 is jacked in, and an annular space 6 is formed between the inner wall of the hole and the outer wall of the pipe joint 1;
the rear part of the annular space 6 is provided with a soil body reinforcing area 9 (after the slurry is solidified, the soil body reinforcing area 9 is formed in the grouting area), and the soil body reinforcing area 9 is positioned 50-100 cm (including two end values) in front of the hole;
the soil behind the soil reinforcing area 9 (between the soil reinforcing area and the wall of the vertical shaft) is called a soil wall area 10; the front end of the soil body well wall zone 10 is provided with an annular pipe 11 in a pre-buried mode around the annular space 6, the annular pipe 11 faces the annular space 6 and is provided with a slurry outlet 12, and the slurry outlet 12 is communicated with the annular space 6; the annular pipe 11 is connected with a grouting interface 14 through a connecting pipe 13, the grouting interface 14 is fixed on the shaft wall 4 of the vertical shaft and is connected with a grouting hose 8, the grouting pump 7 is arranged on the ground, and the inlet of the grouting pump is connected with a slurry stirring device 17 (such as a stirring tank, and the grouting pump 7 is started for grouting after the slurry is stirred).
The hole part surrounds the annular space 6 and is provided with a hole annular sealing device 15, and the hole annular sealing device 15 is a rubber ring or an annular steel plate water stop belt.
The grouting interface 14 is 3 cm in diameter. Each of the outlets 12 has a diameter of 0.5 cm to 1 cm, inclusive.
The slurry is at a higher pressure just before entering the annular space 6 and the pressure will drop after spreading out in the annular space 6. The annular space 6 has a single-sided dimension in the radial direction of the pipe section 1 of 2 cm.
In front-end grouting, since the nose 5 is continuously advanced in pipe-jacking construction, the position of front-end grouting relative to the soil body is not fixed, but continuously advanced, so that a condition that the soil body continuously bears high grouting pressure does not exist, and the soil body reinforcing area 9 is not needed. However, the rear end grouting is constant relative to the soil body, so that the soil body at the grouting position in the grouting direction (forward) continuously bears high grouting pressure, and soil body slump is easily caused.
The utility model solves the main problem that the front end grouting technology cannot shift the value to the rear end grouting by arranging the soil body reinforcing area 9, avoiding the soil body slumping caused by the continuous overlarge pressure at the grouting opening so as to avoid blockage.
By providing the opening annular seal 15, the slurry is prevented from flowing back into the shaft. The grouting joint 14 is used as a connecting structure of the soil inner structure and the soil outer structure, can be continuously connected with the soil body structure (the annular pipe 11 and the connecting pipe 13), and can be conveniently connected with or separated from the pipe outer structure (the grouting hose 8).
The slurry outlets 12 are uniformly provided in plurality along the circumferential direction of the annular pipe 11. The plurality of grout outlets 12 can perform more uniform grouting on the annular space 6, so that the grouting films at all positions in the circumferential direction in the annular space 6 are more uniform, and the friction force between the pipe joint 1 and the soil body is lower when the pipe joint advances
A second annular sealing device 16 is arranged in the annular space 6, and the second annular sealing device 16 is a rubber ring or an annular steel plate water stop; the second annular sealing device 16 corresponds to a middle position of the soil body well wall zone 10 in the front-rear direction and is located behind the annular pipe 11.
The second annular seal 16 and the opening annular seal 15 form a two-way seal that better prevents slurry from entering the shaft under pressure.
The grouting interface 14 is provided with an electronic flowmeter and a pressure sensor, an electric control device 18 connected with the grouting pump 7 is arranged on the ground or in a vertical shaft, the electric control device 18 is connected with the electronic flowmeter and the pressure sensor, and the electric control device 18 is connected with a display screen and a 5G module. The display screen displays the detection information of the electronic flowmeter and the pressure sensor during operation. The electronic control device 18 may be an integrated circuit or a single chip microcomputer. The 5G module, the display screen, the electronic flowmeter and the pressure sensor are all conventional technologies and are not shown in the figure. The slurry stirring device 17 can be controlled by a worker independently, and can also be connected with the electric control device 18, and the starting and stopping of the slurry stirring device can be controlled by the electric control device 18.
The electric control device 18 can send signals to the staff remotely through the 5G module, the staff can monitor and control the grouting structure of the pipe jacking construction shaft opening remotely through the mobile phone, and the use is very convenient.
The electronic control device is connected with an audible and visual alarm and is internally provided with a pressure alarm threshold, and when the grouting pressure is too high or too low, the electronic control device sends alarm information to a mobile phone number reserved by a worker through the 5G module, and simultaneously sends out audible and visual alarm to remind the worker to check and process in time.
The staff can monitor grouting pressure and grouting amount conveniently through the display screen in the ground or the vertical shaft, and the working state of the grouting pump 7 is correspondingly adjusted.
The grouting interfaces 14 are uniformly arranged around the hole, and each grouting interface 14 is communicated with the annular pipe 11 through a connecting pipe 13; the number of grouting interfaces 14 is one third to one half (inclusive) of the number of outlets 12.
The connection between the connecting tube 13 and the annular tube 11, indicated by 19 in fig. 4, is 3 cm in diameter. The number of grouting ports 14 need not be the same as the number of outlets 12, and even if only one half to one third of the number of outlets 12 provides a relatively uniform grouting pressure for each outlet 12.
When the pipe is in jacking construction, the grouting hose 8 is connected with the grouting connector 14, the slurry is stirred, the grouting pump 7 is started along with the forward jacking of the pipe joint 1, and the slurry is continuously injected into the annular space 6 through a plurality of slurry outlets 12 uniformly distributed on the annular pipe 11. The second annular seal 16 blocks the rearward flow of slurry; when the second annular sealing device 16 cannot completely block the slurry, the slurry passing backward through the second annular sealing device 16 is less in quantity and lower in pressure, so that the slurry is easily blocked completely by the hole annular sealing device 15, the slurry cannot enter the vertical shaft, normal operation of equipment in the vertical shaft is guaranteed, and the working environment in the vertical shaft is protected. The operator can conveniently monitor grouting pressure and flow through the display screen, and correspondingly adjusts the working state (start, stop and working frequency) of the grouting pump 7 through the electric control device 18. When pipe jacking construction is suspended, the grouting hose 8 can be detached from the grouting connector 14 according to the requirement. The above embodiments are only for illustrating the technical solution of the present utility model, and it should be understood by those skilled in the art that although the present utility model has been described in detail with reference to the above embodiments: modifications and equivalents may be made thereto without departing from the spirit and scope of the utility model, which is intended to be encompassed by the claims.
Claims (5)
1. The grouting structure for the opening of the jacking pipe construction vertical shaft comprises a jacking pipe which extends into the soil from the wall of the vertical shaft, wherein the jacking pipe is formed by assembling a plurality of pipe joints, a machine head is arranged at the front end of the jacking pipe, the diameter of the machine head is larger than that of the pipe joints, and an annular space is formed between a hole pressed out by the machine head when the machine head advances and the pipe joints; a grouting pump is arranged on the ground outside the vertical shaft, the inlet of the grouting pump is connected with a slurry stirring device, the outlet of the grouting pump is connected with a grouting hose, and an opening on the wall of the vertical shaft where the machine head enters the soil is called a hole;
the method is characterized in that:
the rear part of the annular space is provided with a soil body reinforcing area around the annular space through grouting, and the soil body reinforcing area is positioned 50-100 cm in front of the hole;
the soil body behind the soil body reinforcing area is called a soil body well wall area; the front end of the soil body well wall area is pre-buried and provided with an annular pipe surrounding the annular space, the annular pipe is provided with a slurry outlet, and the slurry outlet is communicated with the annular space; the annular pipe is connected with a grouting interface through a connecting pipe, the grouting interface is fixed on the wall of the vertical shaft and is connected with a grouting hose, the grouting pump is arranged on the ground, and the inlet of the grouting pump is connected with a slurry stirring device;
the hole is surrounded by an annular space and is provided with a hole annular sealing device which is a rubber ring or an annular steel plate water stop belt.
2. The pipe-jacking construction shaft hole grouting structure according to claim 1, wherein: the slurry outlet is uniformly provided with a plurality of slurry outlets along the circumferential direction of the annular pipe.
3. The pipe-jacking construction shaft hole grouting structure according to claim 1, wherein: a second annular sealing device is arranged in the annular space, and the second annular sealing device is a rubber ring or an annular steel plate water stop belt; the second annular sealing device corresponds to the middle position of the soil body well wall area in the front-back direction and is positioned behind the annular pipe.
4. A pipe-jacking construction shaft opening grouting structure as claimed in any one of claims 1 to 3, wherein: the grouting interface is provided with an electronic flowmeter and a pressure sensor, an electric control device connected with a grouting pump is arranged on the ground or in a vertical shaft, the electric control device is connected with the electronic flowmeter and the pressure sensor, and the electric control device is connected with a display screen and a 5G module.
5. The pipe-jacking construction shaft hole grouting structure according to claim 4, wherein: the grouting interfaces are uniformly arranged around the hole, and each grouting interface is communicated with the annular pipe through a connecting pipe; the number of grouting interfaces is one third to one half of the number of grouting ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320497638.5U CN219654701U (en) | 2023-03-15 | 2023-03-15 | Grouting structure for jack-up shaft hole of pipe jacking construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320497638.5U CN219654701U (en) | 2023-03-15 | 2023-03-15 | Grouting structure for jack-up shaft hole of pipe jacking construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219654701U true CN219654701U (en) | 2023-09-08 |
Family
ID=87862909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320497638.5U Active CN219654701U (en) | 2023-03-15 | 2023-03-15 | Grouting structure for jack-up shaft hole of pipe jacking construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219654701U (en) |
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2023
- 2023-03-15 CN CN202320497638.5U patent/CN219654701U/en active Active
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