CN219672635U - Anti-head-planting device of push bench - Google Patents
Anti-head-planting device of push bench Download PDFInfo
- Publication number
- CN219672635U CN219672635U CN202321092049.5U CN202321092049U CN219672635U CN 219672635 U CN219672635 U CN 219672635U CN 202321092049 U CN202321092049 U CN 202321092049U CN 219672635 U CN219672635 U CN 219672635U
- Authority
- CN
- China
- Prior art keywords
- push bench
- drawknot
- pipe
- head
- support ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009434 installation Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 46
- 239000010959 steel Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 21
- 230000003068 static effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 26
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 11
- 230000002265 prevention Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model provides an anti-head-plugging device of a push bench, which is used for connecting the tail end of the push bench with a plurality of pipe sections, increasing the counterweight of the tail end of the push bench and eliminating the head-plugging trend when the push bench exits; the head device is prevented planting by push bench includes: a plurality of connecting units and a plurality of drawknot components; wherein the connecting unit is inserted into the pipe joint and fixed; one end of the drawknot component is fixed with the connecting unit, and the other end of the drawknot component is fixed with the tail end of the push bench or the connecting unit in the adjacent pipe section. Aiming at the common problem of easy head planting in the initial stage of the coming-out of the pipe-jacking construction, the utility model can solve the defects of the prior art and has the technical effects of simple construction, convenient installation, repeated utilization, low material and processing cost, good economic benefit and the like.
Description
Technical Field
The utility model relates to the technical field of pipe jacking construction, in particular to a quick-mounting-dismounting and recyclable pipe jacking machine head planting preventing device.
Background
The pipe jacking construction technology is a non-excavation underground pipeline construction method, and can pass through roads, railways, ground buildings and underground buildings without excavating the ground. However, because the weight of the push bench head is large, when the soil body cannot bear the weight of the push bench head during the process of discharging the push bench, the push bench head can be downwards planted, the correction difficulty is extremely high, and the construction quality is affected.
The pipe jacking hole-outlet anti-head-planting device in the prior art mainly comprises a sleeve and a limiting assembly, and is fixed with a pipe jacking machine through welding. For example, CN115163917a discloses a method for preventing a pipe section of a mud-water pipe jacking machine from being planted in construction, a pipe section and a pipe section are formed into a drawknot through a drawknot device, a processed fixed steel plate and a processed connecting steel plate are respectively used for the front end of a first section of reinforced concrete pipe section and the adjacent circumferential seams of the subsequent pipe section, the fixed steel plate is installed on the inner wall of the pipe section by adopting expansion bolts, the other pipe sections are mutually connected by utilizing the expansion bolts and the connecting steel plate, the pipe jacking machine forms a whole with a certain number of pipes through connection and fixation between the pipe section and the first section of pipe section and the interconnection between the pipe section and the other pipe section, and the drawknot function is realized on the pipe jacking machine, so that the pipe jacking machine is prevented from being stopped for a long time after entering soft soil to generate a planting phenomenon. CN112648434a discloses a pipe push bench hole-outlet device, which comprises a sleeve, a limiting component and a guide rail; the limiting component and the guide rail are respectively arranged on the diameter and the axial direction of the sleeve; the limiting component comprises limiting components which are correspondingly arranged at the front side and the rear side of the sleeve shaft; two groups of limiting components are respectively arranged on the upper side and the lower side; the device can solve the problems of soil and sand gushing, head knocking of the push bench and retreating of the push bench in the conventional push bench hole-out construction.
However, the device and method for preventing the head from being planted in the pipe jacking hole in the prior art have the following technical problems:
1. the fixed steel plate has high precision requirement: firstly, reserving the space between bolt mounting hole sites, and positioning the bolts accurately, and secondly, ensuring accurate mounting positions of pipe joints;
2. the method has great influence on the construction period, mainly has great welding engineering quantity, ensures full welding at each part, prevents adverse influence caused by open welding in construction, and generally takes 3-4 days;
3. by welding connection, the construction cost is high, the material processing cost is high, the material becomes waste after being removed, and the overall cost is too high;
4. the construction method of the sleeve and the limiting assembly is complex, and the quality requirement on construction operators is high.
Disclosure of Invention
The utility model aims to provide an anti-head-planting device of a pipe jacking machine, which aims at solving the defects of the prior art due to the fact that head-planting is easy in the initial stage of a hole outlet commonly existing in pipe jacking construction, and has the technical effects of simplicity in construction, convenience in installation, reusability, low material and processing cost, good economic benefit and the like.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme:
the anti-head-planting device of the push bench is used for connecting the tail end of the push bench with a plurality of pipe sections, increasing the counterweight of the tail end of the push bench and eliminating the head-planting trend when the push bench exits; the head device is prevented planting by push bench includes:
a plurality of connecting units and a plurality of drawknot components; wherein,,
the connecting unit is inserted into the pipe joint and fixed;
one end of the drawknot component is fixed with the connecting unit, and the other end of the drawknot component is fixed with the tail end of the push bench or the connecting unit in the adjacent pipe section.
Preferably, each of the connection units includes:
the support ring is a ring body which can be inserted into the pipe joint, the shape and the size of the outer wall of the support ring are matched with those of the inner wall of the pipe joint, the outer wall of the support ring is abutted with the inner wall of the pipe joint after the support ring is installed, and the support ring and the pipe joint can be fixed through static friction force between the support ring and the pipe joint;
the plurality of tie steel plates are uniformly distributed along the circumferential direction of the support ring, one end of each tie steel plate is fixed with the support ring, and the other end of each tie steel plate extends inwards along the radial direction of the support ring;
the drawknot components are fixedly connected with the drawknot steel plates in one-to-one correspondence.
Preferably, the tail end of the push bench is provided with a plurality of machine body screw holes for connecting pipe joints;
the drawknot component is a drawknot screw rod which is matched with the screw hole of the machine body.
Preferably, each drawknot steel plate is provided with a threaded through hole extending along the axial direction of the supporting ring, and each threaded through hole and each machine body screw hole of the pipe jacking machine are matched with the drawknot screw rod.
Preferably, the pipe joint is a circular pipe;
the support ring is a torus.
Preferably, the support ring comprises:
2 identical support semi-rings can be spliced into a ring body with the outer diameter slightly smaller than the inner diameter of the pipe joint, and a plurality of splicing screw holes are formed in the splicing position; the method comprises the steps of,
and the adjusting bolts are matched with the splicing screw holes and are used for fixing and adjusting the distance between the two support semi-rings, so that the outer wall of each support semi-ring after installation can be abutted against the inner wall of the pipe joint and has enough fixing strength.
Preferably, the tie steel plates of each of the connection units are disposed at one end portion of the support ring in an axial direction, and when 2 connection units are connected to each other, the orientation of each of the connection units is adjusted to maximize the spacing of the tie steel plates of the 2 connection units, thereby increasing the connection strength.
Preferably, the tie steel plate of each connecting unit is disposed at one of the axial ends of the support ring, and when the connecting unit is connected to the push bench, the orientation of the connecting unit is adjusted so that the tie steel plate is farthest from the push bench, thereby increasing the connection strength.
Preferably, the number of the tie steel plates of each of the connection units is 4, and the number of the threaded through holes of each of the tie steel plates 3 is 1.
In summary, compared with the prior art, the head planting prevention device for the push bench provided by the utility model has the following beneficial effects:
1. the problem of the prior art that the requirement on the precision of fixing the steel plate by using the expansion bolts is high is solved, the technical problem that the installation position of the pipe joint is accurate is solved, and the method has the advantages of simplicity and rapidness in construction;
2. the welding procedure is abandoned, the technical problems of large welding engineering quantity and high welding quality requirement in the prior art are solved, and the construction time is greatly saved;
3. the processing cost is low, the device can be repeatedly used for many times, the cost is effectively saved, and the device has good economic benefit;
4. the work in the construction process is mainly bolt fastening, the construction is convenient, and the technical problem of high quality requirements for construction operators is solved.
Drawings
FIG. 1 is a schematic diagram of a head-planting prevention device of a push bench according to the present utility model;
FIG. 2 is a side view of FIG. 1;
fig. 3 is a schematic structural view of the pipe pushing jack head anti-plugging device of the present utility model after being connected with a pipe pushing jack and a pipe joint.
Detailed Description
The utility model provides a head planting prevention device of a push bench, which is further described in detail below with reference to the accompanying drawings and the detailed description. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that, the drawings are in very simplified form and all use non-precise proportions, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present utility model, and are not intended to limit the implementation conditions of the present utility model, so that the present utility model has no technical significance, and any modification of structure, change of proportion or adjustment of size, without affecting the efficacy and achievement of the present utility model, should still fall within the scope covered by the technical content disclosed by the present utility model.
It is noted that in the present utility model, relational terms such as sum and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
With reference to fig. 1-3, the utility model provides an anti-head-plugging device of a push bench, which is used for connecting the tail end of the push bench 1 with a head pipe section G, and connecting a plurality of pipe sections G at the tail end of the head pipe section G according to the counterweight requirement so as to increase the counterweight of the tail end of the push bench 1 and eliminate the head-plugging trend when the push bench 1 exits. Wherein, the tail end of the push bench 1 is provided with a plurality of machine body screw holes 11 for connecting the head pipe section G. As shown in fig. 1 and 2, the head planting preventing device of the push bench comprises a plurality of connecting units and a plurality of drawknot screw rods 4, wherein the connecting units can be fixed with a pipe joint G, and the tail end of the push bench 1 is fixed with the connecting units through the drawknot screw rods 4, so that the push bench 1 is fixed with the head joint G; and fixing between adjacent connecting units is realized through the drawknot screw rod 4, so that fixing between adjacent pipe sections G is realized. Wherein each connection unit includes:
the support ring is a ring body which can be inserted into the pipe joint G, the shape and the size of the outer wall of the support ring are matched with those of the inner wall of the pipe joint G, the outer wall of the support ring is abutted with the inner wall of the pipe joint G after the support ring is installed, and the support ring and the pipe joint G can be fixed through static friction force between the support ring and the pipe joint G. The supporting ring can be made of channel steel or 10mm steel plates. Preferably, the pipe joint G is a circular pipe, the supporting ring is a torus, the processing cost is low, and the installation is more convenient.
Further, in order to allow for a convenient installation of the support ring inside the pipe section G and a firm fixation, it is preferred that in some embodiments the support ring comprises:
the 2 same support half rings 21 can be spliced into a ring body with the outer diameter slightly smaller than the inner diameter of the pipe joint G, can be conveniently installed in the pipe joint G, and are provided with a plurality of splicing screw holes at the splicing position; the method comprises the steps of,
the adjusting bolts 22 are matched with the splicing screw holes and are used for fixing the 2 support half rings 21 and adjusting the distance between the two support half rings; during installation, firstly, the 2 support semi-rings 21 are spliced into a ring body in the pipe joint G, then the 2 support semi-rings 21 are fixed through each splicing screw hole by each adjusting bolt 22, and the distance between the two support semi-rings is adjusted until the outer wall of each support semi-ring 21 abuts against the inner wall of the pipe joint G and the support semi-rings have enough fixing strength. The method of adjusting the spacing of the adjusting bolts 22 is not particularly limited in the present utility model, and any prior art adjusting method may be used, for example, by providing 2 fixing nuts as shown in fig. 2.
The plurality of drawknot steel plates 3 are evenly distributed along the circumference of the support ring, one end of each drawknot steel plate 3 is fixed with the support ring, the other end of each drawknot steel plate extends inwards along the radial direction of the support ring, threaded through holes extending along the axial direction of the support ring are formed in the drawknot steel plates, and each threaded through hole is matched with each machine body screw hole 11 of the push bench 1.
The drawknot screw rods 4 are matched with the threaded through holes of the drawknot steel plates 3 of the connecting units and the body screw holes 11 of the pipe pushing machine 1, as shown in figure 3, when the pipe pushing machine is installed, the locking and fixing of the pipe pushing machine 1 and the connecting units can be realized through the threaded matching of the two ends of the drawknot screw rods 4 with the threaded through holes of the drawknot steel plates 3 of the connecting units and the body screw holes 11 of the pipe pushing machine 1 respectively; or the two ends of the drawknot screw rod 4 are respectively matched with the threads of the threaded through holes of the drawknot steel plates 3 of the 2 adjacent connecting units, so that the 2 adjacent connecting units are locked and fixed; as described above, since each connection unit can be fixed to each pipe joint G, the connection between the push bench 1 and the head pipe joint G and the connection between the adjacent pipe joints G can be fixed.
Wherein, preferably, the number of the drawknot steel plates 3 of each connecting unit is 4, the number of the threaded through holes of each drawknot steel plate 3 is 1, the installation can have enough firmness, the connection units are convenient to connect with each other and the push bench 1, and the material cost is saved.
Preferably, the drawknot steel plates 3 of the connecting units are arranged at one end part of the axial direction of the supporting ring, and when the 2 connecting units are connected with each other, the orientation of the connecting units is adjusted to maximize the spacing between the drawknot steel plates 3 of the 2 connecting units, so that the connecting strength is increased; when the connecting unit is connected with the push bench 1, the orientation of the connecting unit is adjusted to enable the drawknot steel plate 3 to be farthest away from the push bench 1, so that the connecting strength is increased.
Preferably, the threaded through holes of the drawknot steel plates 3 of the connecting units are not right opposite to the screw holes 11 of the machine body of the push bench 1, so that the drawknot screw rods 4 between the push bench 1 and the connecting units in the first-section pipe section G are fixed in a diagonal manner, and a relatively horizontal fixing mode can be realized, and the push bench has larger fixing strength.
The installation and use method of the head planting prevention device of the pipe pushing jack comprises the following steps:
1. when the pipe pushing jack 1 starts to go out of a tunnel, firstly, 1 connecting unit is installed at one end of a first pipe joint G; in particular to a special-shaped ceramic tile,
the 2 support semi-rings 21 are spliced into a ring body in the inner part of one end part of the pipe joint G, then the 2 support semi-rings 21 are fixed through each splicing screw hole by each adjusting bolt 22, and the distance between the two support semi-rings is adjusted until the outer wall of each support semi-ring 21 is abutted against the inner wall of the pipe joint G and the support semi-rings have enough fixing strength.
2. Connecting the push bench 1 with a first pipe joint G; in particular to a special-shaped ceramic tile,
the end part of the support ring is arranged at the head pipe section G and aligned with the tail end of the push bench 1, two ends of the drawknot screw rod 4 are respectively screwed with a machine body screw hole 11 of the push bench 1 and a threaded through hole of a drawknot steel plate 3 of a connecting unit in a threaded fit manner, so that the push bench 1 and the connecting unit are locked and fixed, and further, the push bench 1 and the head pipe section G are fixed.
3. According to the calculated connection quantity of the pipe sections G, the tail end of the head pipe section G is sequentially connected with a corresponding quantity of pipe sections G; in particular to a special-shaped ceramic tile,
a. according to the method of the step 1, connecting units are respectively arranged at the other end of the first pipe section G and the adjacent end of the adjacent pipe section G, then the two ends of the drawknot screw rod 4 are respectively screwed with the threads of the threaded through holes of the drawknot steel plates 3 of the 2 adjacent connecting units in a matching way, and the 2 adjacent connecting units are locked and fixed, so that the fixation between the adjacent pipe sections G is realized.
b. And c, completing connection and fixation of the rest pipe joints G according to the method of the step a.
4. By continuing the pipe jacking construction work and integrally pulling the pipe push bench 1 and each pipe joint G, the occurrence of the head-mounting failure of the pipe push bench 1 can be prevented, and the pipe push bench 1 can always maintain a good posture.
In summary, the head-planting prevention device for the pipe push bench solves the problem that the precision requirement for fixing a steel plate by using expansion bolts is high in the prior art, solves the problem that the installation position of a pipe joint is accurate, and has the advantages of simplicity and rapidness in construction; the welding procedure is abandoned, the difficult problems of large welding engineering quantity and high welding quality requirement are solved, and the construction time is greatly saved; the processing cost is low, the device can be repeatedly used for many times, the cost is effectively saved, and the device has good economic benefit; the work in the construction process is mainly bolt fastening, the construction is convenient, and the technical problem of high quality requirements for construction operators is solved.
While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the utility model should be limited only by the attached claims.
Claims (9)
1. The anti-head-planting device of the push bench is used for connecting the tail end of the push bench with a plurality of pipe sections, increasing the counterweight of the tail end of the push bench and eliminating the head-planting trend when the push bench exits; the head planting preventing device of the push bench is characterized by comprising:
a plurality of connecting units and a plurality of drawknot components; wherein,,
the connecting unit is inserted into the pipe joint and fixed;
one end of the drawknot component is fixed with the connecting unit, and the other end of the drawknot component is fixed with the tail end of the push bench or the connecting unit in the adjacent pipe section.
2. The head anti-sticking apparatus of a push bench according to claim 1, wherein each of the connection units comprises:
the support ring is a ring body which can be inserted into the pipe joint, the shape and the size of the outer wall of the support ring are matched with those of the inner wall of the pipe joint, the outer wall of the support ring is abutted with the inner wall of the pipe joint after the support ring is installed, and the support ring and the pipe joint can be fixed through static friction force between the support ring and the pipe joint;
the plurality of tie steel plates are uniformly distributed along the circumferential direction of the support ring, one end of each tie steel plate is fixed with the support ring, and the other end of each tie steel plate extends inwards along the radial direction of the support ring;
the drawknot components are fixedly connected with the drawknot steel plates in one-to-one correspondence.
3. The head anti-sticking device of the push bench according to claim 2, wherein the tail end of the push bench is provided with a plurality of machine body screw holes for connecting pipe joints;
the drawknot component is a drawknot screw rod which is matched with the screw hole of the machine body.
4. The head anti-sticking device of pipe jacking machine according to claim 3, wherein,
each drawknot steel plate is provided with a threaded through hole extending along the axial direction of the supporting ring, and each threaded through hole and each machine body screw hole of the pipe jacking machine are matched with the drawknot screw rod.
5. The head anti-sticking device of a push bench according to claim 4, wherein the pipe joint is a round pipe;
the support ring is a torus.
6. The head anti-sticking device of a push bench according to claim 5, wherein the support ring comprises: 2 identical support semi-rings can be spliced into a ring body with the outer diameter slightly smaller than the inner diameter of the pipe joint, and a plurality of splicing screw holes are formed in the splicing position; the method comprises the steps of,
and the adjusting bolts are matched with the splicing screw holes and are used for fixing and adjusting the distance between the two support semi-rings, so that the outer wall of each support semi-ring after installation can be abutted against the inner wall of the pipe joint and has enough fixing strength.
7. The head anti-sticking device of push bench according to claim 4, wherein,
the tie steel plates of each connecting unit are arranged at one axial end of the supporting ring, and when 2 connecting units are connected with each other, the orientation of each connecting unit is adjusted to maximize the spacing of the tie steel plates of the 2 connecting units, so that the connecting strength is increased.
8. The head anti-sticking device of push bench according to claim 4, wherein,
the drawknot steel plates of the connecting units are arranged at one axial end part of the supporting ring, and when the connecting units are connected with the push bench, the orientation of the connecting units is adjusted to enable the drawknot steel plates to be farthest away from the push bench, so that the connecting strength is improved.
9. The head anti-sticking device of push bench according to claim 4, wherein,
the number of the tie steel plates of each connecting unit is 4, and the number of the threaded through holes of each tie steel plate is 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321092049.5U CN219672635U (en) | 2023-05-09 | 2023-05-09 | Anti-head-planting device of push bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321092049.5U CN219672635U (en) | 2023-05-09 | 2023-05-09 | Anti-head-planting device of push bench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219672635U true CN219672635U (en) | 2023-09-12 |
Family
ID=87899239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321092049.5U Active CN219672635U (en) | 2023-05-09 | 2023-05-09 | Anti-head-planting device of push bench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219672635U (en) |
-
2023
- 2023-05-09 CN CN202321092049.5U patent/CN219672635U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113356198A (en) | Single-spliced channel steel anchor rod waist beam structure and using method thereof | |
| CN219672635U (en) | Anti-head-planting device of push bench | |
| JP3128229U (en) | Support material | |
| CN206888040U (en) | A kind of plumbing device of ground load-bearing pillar | |
| CN107700494B (en) | Deep foundation pit steel pipe inner support prestress applying device | |
| CN113309114B (en) | Steel support connection structure | |
| CN112211259B (en) | Connection module of water supply and drainage system of green building and construction method thereof | |
| CN220365017U (en) | Side slope supporting structure | |
| JP7199275B2 (en) | Propulsion force transmission device for seismic pipe propulsion installation method | |
| CN219710328U (en) | Deep foundation pit steel pipe inclined support fixing device | |
| CN215908534U (en) | Interim strutting arrangement in steel corrugated pipe culvert | |
| CN219198540U (en) | Corrugated steel pipe reinforcing device | |
| CN111963796A (en) | Large-diameter pipeline lining reinforcing structure and maintenance method | |
| CN219547587U (en) | Prestress steel bundle pipeline positioning device | |
| CN218787401U (en) | Be applied to pipeline non-excavation and restore auxiliary device of slip casting | |
| CN220118795U (en) | Pipeline fixing device for water conservancy and hydropower construction | |
| CN210164486U (en) | Two lining waterstop location installation device in tunnel | |
| CN110725531B (en) | Be applied to interim factory building and build with removable steel pipe | |
| CN211056557U (en) | Tower crane foundation connection structure | |
| CN220851120U (en) | Joint mounting system of water supply pipeline | |
| CN214464212U (en) | Interim bearing structure in tunnel | |
| CN219177203U (en) | Internal support deformation preventing device for large-caliber flexible pipeline electric smelting connection construction | |
| CN111764399B (en) | Wall protection reinforcing steel bar for underground pipe gallery foundation pit slope protection engineering and construction method thereof | |
| CN118187098B (en) | Deep foundation pit inner supporting method based on inner force adjustment | |
| CN219315843U (en) | Foundation pile detection sounding pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |