CN112031779A - Shaft cantilever concrete unloader - Google Patents
Shaft cantilever concrete unloader Download PDFInfo
- Publication number
- CN112031779A CN112031779A CN202011007607.4A CN202011007607A CN112031779A CN 112031779 A CN112031779 A CN 112031779A CN 202011007607 A CN202011007607 A CN 202011007607A CN 112031779 A CN112031779 A CN 112031779A
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- cantilever
- blanking
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- concrete
- pipe
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- 239000004567 concrete Substances 0.000 title claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 239000000872 buffer Substances 0.000 claims abstract description 35
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 28
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 28
- 241001330002 Bambuseae Species 0.000 claims abstract description 28
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 28
- 239000011425 bamboo Substances 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 17
- 238000010276 construction Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 7
- 238000005204 segregation Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 10
- 241000406668 Loxodonta cyclotis Species 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000617 Mangalloy Inorganic materials 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 elements Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a vertical shaft cantilever concrete blanking device.A cantilever support is fixed at a vertical shaft mouth, the cantilever supports are fixed through a cross beam, and an anti-skid steel plate is arranged on each cantilever support; a fixed pulley is arranged on the cantilever support, and a winch steel wire rope connected to a winch is placed on the fixed pulley; the cantilever support is also provided with a receiving hopper, the lower part of the receiving hopper is sequentially connected with a plurality of discharging slide pipes, the last section of discharging slide pipe is connected to a buffer, the buffer is sequentially connected with a plurality of bamboo joint barrels, and each discharging slide pipe is connected with a winch steel wire rope. The device adopts a brand new design concept, reduces the flow velocity of concrete, avoids aggregate segregation, simultaneously reduces the probability of pipe blockage to the minimum, adopts a winch suspension mode to ensure that the installation and the disassembly of a blanking system are safer and more convenient, is favorable for continuous operation in the concrete pouring process, and accelerates the construction progress.
Description
Technical Field
The invention relates to the field of construction facilities for spray anchor and lining in a vertical shaft, in particular to a concrete blanking device for a cantilever of the vertical shaft.
Background
The shaft construction is the most common structure in the engineering field, the shaft needs to be anchored and sprayed during the excavation process, the lining operation needs to be carried out after the excavation is finished, and the shotcrete and the concrete need to be vertically conveyed to a working surface during the shotcrete and lining construction, so that a vertical blanking system is a necessary method in the construction.
In the traditional construction method, a blanking chute of a blanking system is welded and fixed on a well wall by adopting measures such as an anchor rod and the like, and meanwhile, buffers are arranged at intervals of 10-20 m. The traditional construction method has the following defects: firstly, along with the continuous change of the engineering progress, the elevation of the working surface is also gradually changed, an operator needs to perform multiple installation or removal operations on the well wall in the construction process, other equipment and safety measures need to be equipped for the operation in the mid-air to ensure the safety of the operator, and the installation and removal work also takes more time; secondly, the method that the blanking chute is fixed on the well wall enables the chute not to move, and the covered working range is small; thirdly, under the condition that the depth of the vertical shaft is deep, more buffers are adopted to increase the risk of blocking the blanking chute, and the dredging difficulty of the chute behind the blocking is larger.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a vertical shaft cantilever concrete blanking device which has obvious advantages in the aspects of installation, dismantling, working range and the like of a blanking chute, and is provided with a special buffer, so that the probability of pipe blockage is reduced to the minimum while the flow speed of concrete is reduced to avoid aggregate segregation, a blanking system is enabled to run continuously more stably, and the risk of pipe blockage dredging is avoided.
In order to solve the technical problems, the invention adopts the technical scheme that:
a cantilever support is fixed at a shaft mouth of a vertical shaft, the cantilever supports are fixed through a cross beam, and an anti-skid steel plate is arranged on each cantilever support; a fixed pulley is arranged on the cantilever support, and a winch steel wire rope connected to a winch is placed on the fixed pulley; the cantilever support is also provided with a receiving hopper, the lower part of the receiving hopper is sequentially connected with a plurality of discharging slide pipes, the last section of discharging slide pipe is connected with a buffer, and the buffer is sequentially connected with a plurality of bamboo joint barrels; each blanking chute is connected with a steel wire rope of a winch; the buffer structure is as follows: the buffer device comprises a bearing pipe at one side and a connecting and lowering pipe at the other side, wherein the bearing pipe and the connecting and lowering pipe are provided with openings, the two openings are oppositely arranged and communicated, the outer edges of the openings are sealed through a closed steel plate, the upper opening of the bearing pipe is provided with a buffer flange plate, and the upper opening of the connecting and lowering pipe is provided with a top cover; the upper opening of the bearing pipe is connected with a discharging chute through a buffer flange plate, and the lower opening of the connecting pipe is connected with the bamboo joint barrel.
Further, the cantilever support is fixed on the foundation concrete of the wellhead ground through an anchor rod of the ground anchor.
Furthermore, a safety steel wire rope is further arranged on the cantilever support and used for connecting each blanking chute.
Further, the blanking chute comprises a blanking chute body, flange plates are arranged at the upper end and the lower end of the blanking chute body, and lifting lugs are arranged on the blanking chute body; the steel wire rope of the winch is connected with the lifting lug of the blanking chute through a steel wire rope clamp.
Furthermore, the lifting lugs are provided with two lifting lugs and symmetrically fixed on the blanking chute pipe body.
Furthermore, reinforcing steel bars with a reinforcing function are distributed in the blanking chute pipe body.
Furthermore, the bamboo joint bucket includes bamboo joint bucket staving, the side of bamboo joint bucket staving upper end is fixed with rings, and the lower extreme side is fixed with the couple.
Furthermore, rings have two, and the symmetry is fixed on the bamboo joint bucket staving, the couple has two, and the symmetry is fixed on the bamboo joint bucket.
Furthermore, a plurality of screw-thread steels are fixed in parallel outside the joint section of the bearing pipe and the connecting pipe, and the joint section is fixed by adopting a steel plate shell.
Furthermore, the cantilever support is formed by welding I18I-shaped steel, and a protective fence and a dense mesh net are further arranged on a working platform formed by the cantilever support, the cross beam and the anti-skid steel plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the whole blanking system is in a suspended state, different from a traditional well wall fixing mode, installation and removal are completed by hoisting through a winch, and installation and removal time is greatly shortened. Particularly, in the vertical shaft slip form pouring stage, along with the rising of the slip form, the dismantling speed must meet the rising speed of the mold body, the chute cannot be filled with concrete during dismantling, and the continuity of slip form pouring is influenced and the concrete is easy to form a cold joint after too long time;
2. the installation and the removal are completed on a wellhead working platform by adopting a winch, so that the safety risk of the installation and the removal in the air is avoided; meanwhile, equipment for lifting and working personnel is omitted;
3. the specially designed buffer is only installed at the bottom of the blanking chute in 1, and the buffer of the concrete and the effect of reducing aggregate segregation can be met by changing the flowing direction of the concrete. In addition, compared with the traditional buffer, the installation quantity is reduced, the installation difficulty is reduced, and meanwhile, the risk of pipe blockage and the treatment difficulty after pipe blockage are also reduced;
4. this device adopts the mode of suspending in midair, and the steel pipe has the bamboo joint bucket of certain flexible cooperation bottom under the longer condition of length to increase the coverage that single unloading elephant trunk entered into the warehouse, has promoted working range, adopts this device can reduce the quantity of arranging of unloading system when the shaft of equal diameter is under construction.
Drawings
Fig. 1 is a schematic structural diagram of a wellhead of a vertical shaft cantilever concrete blanking device.
Fig. 2 is a schematic diagram of a blanking chute structure of the vertical shaft cantilever concrete blanking device.
Fig. 3 is a schematic view of a bamboo joint barrel structure of the vertical shaft cantilever concrete blanking device.
Fig. 4 is a schematic diagram of a buffer structure of the vertical shaft cantilever concrete blanking device.
Fig. 5 is a schematic diagram of the internal thread steel of the buffer of the vertical shaft cantilever concrete blanking device.
Fig. 6 is a schematic view of an opening of the concrete blanking device of the vertical shaft cantilever.
Fig. 7 is a schematic view of a closing steel plate of the vertical shaft cantilever concrete blanking device.
Fig. 8 is a schematic diagram of the whole structure of the vertical shaft cantilever concrete blanking device.
In the figure: a well wall 1; well wall latch concrete 2; a base concrete 3; a wellhead floor 4; a ground anchor rod 5; a hoist wire rope 6; a fixed pulley 7; a receiving hopper 8; a cantilever support 9; a safety wire rope 10; an antiskid steel plate 11; a cross beam 12; a flange 13; a blanking chute pipe body 14; a lifting lug 15; reinforcing steel bars 16; a hanging ring 17; a bamboo joint barrel body 18; a hook 19; a bumper flange 20; a carrier pipe 21; a top cover 22; connecting the tube 23; deformed steel 24; an opening 25; closing the steel plate 26.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention relates to a concrete blanking device for a vertical shaft cantilever, which comprises the following components:
1. the blanking part mainly comprises: the device comprises a winch, a fixed pulley 7, a receiving hopper 8, a winch steel wire rope 6, a safety steel wire rope 10, a discharging chute (standard section), a buffer and a bamboo joint barrel (soft section chute barrel).
2. The well head encorbelments a set: cantilever support 9, the basic concrete 3 at rear portion, the earth anchor stock 5, work platform, cantilever support 9 adopts I18I-steel welding to form, the partial length of encorbelmenting is 1.5 meters, the triangular supports is erect to the section bottom of encorbelmenting, the wall of a well is hugged closely to the triangular supports, basic concrete 3 is pour at the I-steel rear portion, highly be 50cm with 2 parallel and level of wall of a well fore shaft concrete, beat in the concrete 6 in the root in 25L =4.5m earth anchor stock 5 as the whole anchor structure of encorbelmenting the support group, ensure that the atress of cantilever section is stable. An anti-skid steel plate 11 with the thickness of 3mm is laid on the cantilever frame to serve as a working platform, a window of 40cm multiplied by 40cm is arranged on the anti-skid steel plate 11 and used for installing a blanking chute, a protective fence and a dense mesh net are arranged on the periphery of the working platform, and the height of the protective fence is 1.2 m. The cantilever frame is transversely provided with three I-beams which are welded to form a cross beam 12, 2 of the cross beams can be used for installing the fixed pulley 7, and the other 1 of the cross beams is used for fixing the safety steel wire rope 10.
3. The receiving hopper 8 is formed by welding 6mm steel plates, and a circular structure with the bottom of the hopper being 10cm high is inserted into the blanking chute.
4. A blanking chute: the 273 wall thickness 6mm manganese steel pipe processing in the unloading elephant trunk adopts, standard festival length is 3 meters (easy to assemble with demolish), steel pipe both ends welding flange dish 13, 6 root in inside pipe wall welding 12 reinforcing bars 16, length 10cm, wherein the welding exposes 5cm at intraductal 5cm, the primary function, firstly carry out the intraductal buffering of concrete in-process that falls, secondly the butt joint centering of two steel pipes in the installation of being convenient for, improve flange bolted connection's work efficiency. Two lifting lugs 15 are welded at the middle part of the blanking chute body 14 by adopting steel bars with the same diameter as the steel wire rope.
5. The winch is installed behind the cantilever support, the fixed pulley 7 is installed on a cross beam 12 on the upper portion of the cantilever support, and a winch steel wire rope 6 is vertically downwards connected and fixed with a lifting lug 15 on the wall of the standard joint pipe through a steel wire rope card after the direction of the winch steel wire rope is changed through the fixed pulley 7.
6. The diameter of the safety steel wire rope 10 is the same as that of the winch steel wire rope 6, and the safety steel wire rope is connected and fixed with the lifting lug 15 on the other side of the standard knot by a steel wire rope card.
7. A buffer: the buffer adopts two decentraction in 273 wall thickness 6mm manganese steel pipe dislocation welding side by side to form, and in the crossing regional opening of two pipes, two spinal branch pipes are the takeover 21 respectively and link low tube 23, and in concrete flowed from a pipe in the opening to another, the open position was from the takeover bottom 30cm, from linking low tube 23 top 20 cm. And an openable top cover 22 is manufactured at the top of the connecting lower pipe 23, so that the dredging of the concrete in case of congestion is facilitated. Wrap up in the connection position all around in 25 deformed steel 24 and 8mm steel sheet are used for the enhancement of connection position, and the buffer upper shed links to each other with the unloading elephant trunk, and the end opening links to each other with the bamboo joint bucket.
8. Bamboo joint barrel (also called soft festival swift current barrel): the bottom of the blanking system is connected by a bamboo joint barrel with the height of about 6-9 m, the height of a single-section sliding barrel is about 1m, and the sliding barrel (a bamboo joint barrel body 18) is formed by curling iron sheets with the thickness of 1.5 mm. The upper part of the sliding barrel is provided with two hanging rings 17, and the lower part of the sliding barrel is provided with two hooks 19 which are mutually nested.
When the device is used, 1, firstly, the required number of blanking systems is calculated according to the diameter, the body type characteristics, the concrete volume, the construction strength and the like of a vertical shaft, the specific installation position and the like are determined, and the stress calculation of each stress structure is completed; 2. installing anchor bolts 5 at the determined positions, wherein 6 anchor bolts 5 can be installed, and the length of each anchor bolt is 25L =4.5 m; 3. pouring foundation concrete 3, wherein the concrete elevation is level to the elevation of the wellhead; installing cantilever supports 9 made of I-shaped steel on poured foundation concrete 3, welding the I-shaped steel into a group by adopting I18, designing two groups of blanking systems, wherein the distance between the two groups is 85cm, fixing the rear parts of the I-shaped steel by adopting the anchor rod 5 of the ground anchor in a hoop mode, setting the length of an overhanging part to be 1.5m, erecting triangular supports at the bottoms of overhanging sections, and enabling the triangular supports to be tightly attached to a well wall; 4. welding the I-beam cross beam 12 to the overhanging I-beam (or integrally assembling and welding the I-beam and hoisting the I-beam in place), wherein 3I-beams are arranged, 2I-beams are used for installing the fixed pulley 7, and the other 1I-beam is used for fixing the safety steel wire rope 10; 5. paving an anti-skid steel plate 11 with the thickness of 3mm on the overhanging I-shaped steel as a working platform, opening a window of 40cm multiplied by 40cm on the anti-skid steel plate 11 for installing a blanking chute, arranging a protective fence and a dense mesh net around the working platform, wherein the height of the protective fence is 1.2 m; 6. connecting the buffer with the first section of standard knot by adopting a flange, and then gradually installing the first section in place by adopting a crane and a winch; 7. the remaining standard sections are installed section by adopting a winch, the standard sections are connected by adopting flanges, personnel can finish the installation after standing on a working platform, a lifting lug 15 and a steel wire rope of each standard section are connected and fixed by adopting a hoop, and a safety steel wire rope 10 is synchronously installed; 8. and after the standard knot is installed in place, the bamboo joint barrels are manually connected in series one by one and hung below the buffer.
When the device is dismantled, the winch is started on the working platform to hoist along with the continuous rising of the elevation of a working surface (such as concrete pouring), the hoisting height is 1 standard section height each time, and the device is manually dismantled, then is moved out of the field and is dismantled section by section. And after the construction is completed, the buffer is lifted out by adopting the cooperation of a crane, and the dismantling is completed.
The concrete is transported to a wellhead platform by a tank car and then backs to a receiving hopper 8 of a discharging system, then the concrete is unloaded, the concrete passes through the receiving hopper 8, a standard section, a buffer and a bamboo joint barrel and finally enters a bin, and the concrete is moved to a position needing concrete entering the bin by a manual traction mode by utilizing the function that the bamboo joint barrel can be flexibly moved for discharging and pouring.
The device adopts a winch steel wire rope 6 to suspend the blanking chute on a top cantilever platform, no other fixing mode exists between the whole blanking chute and a well wall, a buffer is arranged at the bottommost part of the blanking chute and used for buffering concrete and slowing down concrete aggregate separation, and a bamboo joint barrel is connected below the buffer and used for distributing materials. The device greatly reduces the working difficulty of installation and removal, and simultaneously reduces the safety risk in the installation and removal process. The buffer also reduces the installation quantity of buffer when reducing the falling speed of concrete, slowing down aggregate segregation, and every unloading elephant trunk only need can satisfy the requirement at 1 buffer of bottom installation. The blanking elephant trunk adopts the mode of hanging in midair and has certain flexible cooperation bamboo joint bucket of bottom when the construction of darker shaft can cover bigger scope, has increased the working range of single blanking elephant trunk.
The foregoing detailed description and drawings are merely representative of the presently preferred embodiments of the invention. It will be apparent that various additions, modifications and substitutions are possible without departing from the spirit and scope of the invention as defined in the accompanying claims. It will be appreciated by those skilled in the art that the present invention may be varied in form, structure, arrangement, proportions, materials, elements, components and otherwise, used in the practice of the invention, depending upon specific environments and operating requirements, without departing from the principles of the present invention. Accordingly, the presently disclosed embodiments are meant to be illustrative only and not limiting, the scope of the invention being indicated by the appended claims and their legal equivalents, rather than by the foregoing description.
Claims (10)
1. The vertical shaft cantilever concrete blanking device is characterized in that cantilever supports (9) are fixed at a vertical shaft mouth, the cantilever supports (9) are fixed through cross beams (12), and anti-skid steel plates (11) are arranged on the cantilever supports (9); a fixed pulley (7) is arranged on the cantilever support (9), and a winch steel wire rope (6) connected to a winch is placed on the fixed pulley (7);
a receiving hopper (8) is further arranged on the cantilever support (9), a plurality of discharging slide pipes are sequentially connected below the receiving hopper (8), the last section of discharging slide pipe is connected to a buffer, and the buffer is sequentially connected with a plurality of bamboo joint barrels; wherein each blanking chute is connected with a winch steel wire rope (6);
the buffer structure is as follows: the buffer device comprises a bearing pipe (21) at one side and a connecting lower pipe (23) at the other side, wherein the bearing pipe (21) and the connecting lower pipe (23) are provided with openings (25), the two openings (25) are oppositely arranged and communicated, the outer edge of each opening (25) is sealed by a closed steel plate (26), the upper opening of the bearing pipe (21) is provided with a buffer flange plate (20), and the upper opening of the connecting lower pipe (23) is provided with a top cover (22); the upper opening of the bearing pipe (21) is connected with a blanking chute through a buffer flange plate (20), and the lower opening of the connecting lower pipe (23) is connected with the bamboo joint barrel.
2. A shaft cantilever concrete blanking unit according to claim 1, characterized in that the cantilever support (9) is fixed to the foundation concrete (3) of the wellhead floor (4) by means of an earth anchor bolt (5).
3. Shaft cantilever concrete blanking unit according to claim 1, characterized in that a safety wire (10) is also provided on the cantilever support (9), said safety wire (10) being used to connect each blanking chute.
4. Shaft cantilever concrete blanking unit according to claim 1, characterized in that the blanking chute comprises a blanking chute body (14), with flanges (13) at both the upper and lower ends of the blanking chute body (14), and with lifting lugs (15) on the blanking chute body (14); the steel wire rope (6) of the winch is connected with the lifting lug (15) of the blanking chute through a steel wire rope clamp.
5. Shaft cantilever concrete blanking unit according to claim 4, wherein the lifting lugs (15) are two and symmetrically fixed to the blanking chute body (14).
6. Shaft cantilever concrete blanking unit according to claim 4, characterized in that the inside of the blanking chute body (14) is also distributed with reinforcing bars (16) with reinforcement.
7. The vertical shaft cantilever concrete blanking device according to claim 1, characterized in that the bamboo joint barrel comprises a bamboo joint barrel body (18), a hanging ring (17) is fixed on the upper end side of the bamboo joint barrel body (18), and a hook (19) is fixed on the lower end side.
8. The vertical shaft cantilever concrete blanking device according to claim 7, wherein the lifting ring (17) has two, and is symmetrically fixed on the bamboo joint barrel body (18), and the hanging hook (19) has two, and is symmetrically fixed on the bamboo joint barrel (18).
9. A shaft cantilever concrete blanking device according to claim 1, characterized in that a plurality of screw-thread steel bars (24) are fixed in parallel outside the joint section of the adapting pipe (21) and the connecting pipe (23), and the joint section is fixed by a steel plate shell.
10. The vertical shaft cantilever concrete blanking device of claim 1, wherein the cantilever support (9) is welded by I18I-steel, and a protective fence and a dense mesh net are further arranged on a working platform formed by the cantilever support (9), the cross beam (12) and the antiskid steel plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011007607.4A CN112031779A (en) | 2020-09-23 | 2020-09-23 | Shaft cantilever concrete unloader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011007607.4A CN112031779A (en) | 2020-09-23 | 2020-09-23 | Shaft cantilever concrete unloader |
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| Publication Number | Publication Date |
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| CN112031779A true CN112031779A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011007607.4A Pending CN112031779A (en) | 2020-09-23 | 2020-09-23 | Shaft cantilever concrete unloader |
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| CN (1) | CN112031779A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809090A (en) * | 2022-05-06 | 2022-07-29 | 保利长大工程有限公司 | Self-compacting concrete pouring method for steel shell immersed tube tunnel wall |
-
2020
- 2020-09-23 CN CN202011007607.4A patent/CN112031779A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809090A (en) * | 2022-05-06 | 2022-07-29 | 保利长大工程有限公司 | Self-compacting concrete pouring method for steel shell immersed tube tunnel wall |
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