CN110803621A - Device for recovering concrete well pipe of dewatering well and using method thereof - Google Patents
Device for recovering concrete well pipe of dewatering well and using method thereof Download PDFInfo
- Publication number
- CN110803621A CN110803621A CN201911010662.6A CN201911010662A CN110803621A CN 110803621 A CN110803621 A CN 110803621A CN 201911010662 A CN201911010662 A CN 201911010662A CN 110803621 A CN110803621 A CN 110803621A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- well pipe
- concrete well
- reinforcing rib
- recovering
- 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.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
- B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
- B66C1/54—Internally-expanding grippers for handling hollow articles
- B66C1/56—Internally-expanding grippers for handling hollow articles for handling tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/12—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable
- B66D3/16—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable operated by an endless chain passing over a pulley or a sprocket
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention provides a device for recovering a concrete well pipe of a dewatering well, which comprises: the support is arranged on a wellhead; the hoisting device is arranged on the bracket; the gripping apparatus comprises a cross brace, a reinforcing rib plate and a touch foot, wherein the reinforcing rib plate is arranged at the bottom of the cross brace, and the touch foot is arranged on the reinforcing rib plate and used for gripping the concrete well pipe. The invention also provides a using method of the device, firstly, the support is erected on the wellhead of the dewatering well, the chain block is placed on the support, and the auxiliary lifting rope is hung on the chain block; the gripping apparatus is assembled, and the gripping apparatus is lowered and extended into the concrete well pipe; the touch foot is tensioned to grab the wall of the concrete well pipe and lift the concrete well pipe. The method has the advantages of low cost, high recycling frequency, material and energy saving and great social benefit creation.
Description
Technical Field
The invention belongs to the field of underground engineering dewatering and drainage, and particularly relates to a device and a method for recovering a concrete well pipe of a dewatering well.
Background
A plurality of precipitation wells are required to be built for precipitation in underground construction dewatering and drainage construction, at present, the tube well precipitation is a precipitation mode which is common in application and relatively mature in technology, and when the tube well precipitation is adopted, steel tubes, cast iron tubes, cement tubes, plastic tubes and the like are generally adopted in the prior art. Although the well pipe made of the steel pipe or the cast iron pipe has high strength and good water outlet effect, a large amount of gravel is extruded around the well pipe after the foundation pit is finished, so that the well pipe is disposable, is not easy to recover and can not be recycled, certain resource waste is caused, and the requirement of environmental protection cannot be met while the cost is high. Therefore, on the premise of meeting the requirement of foundation pit dewatering, a device and a method for recycling the concrete well pipe of the dewatering well are developed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device for recovering the dewatering well concrete well pipe and a using method of the device for recovering the dewatering well concrete well pipe.
The technical scheme adopted by the invention is as follows: an apparatus for recovering precipitation well concrete well pipe, comprising: the support is arranged on a wellhead and used for fixing the device; the hoisting device is arranged on the support and comprises a chain block, a main hoisting rope and an auxiliary hoisting rope, the chain block is arranged on the support, the bottom of the chain block is provided with a chain block lifting hook, and the main hoisting rope and the auxiliary hoisting rope are connected with the chain block through the chain block lifting hook; the gripping apparatus comprises a bridging device body, the gripping apparatus body comprises a bridging device body, reinforcing rib plates and a contact foot, the reinforcing rib plates are arranged at the bottom of the bridging device body, the contact foot is arranged on the reinforcing rib plates and used for grasping the concrete well pipe, a hoisting hole is formed in the top end of the bridging device body, and the gripping apparatus body is connected with the main hoisting rope through the hoisting hole.
Further, the cross brace comprises two arc-shaped steel plates which are arranged in an axisymmetric mode and are respectively a first steel plate and a second steel plate, and the first steel plate and the second steel plate are X-shaped.
Further, the first steel plate 3/4 and 4/5 department is provided with two regulation holes A, second steel plate 3/4 and 4/5 department also is provided with two regulation holes B, first steel plate with the second steel plate passes through bolted connection, the bolt inserts in proper order regulation hole A with regulation hole B realizes connecting.
Furthermore, the reinforcing rib plates comprise two arc-shaped steel plates which are arranged in an axisymmetric manner, and the arc-shaped steel plates are respectively a first reinforcing rib plate and a second reinforcing rib plate, and a connecting hole is respectively formed between the first reinforcing rib plate and the second reinforcing rib plate and is used for connecting the first steel plate with the first reinforcing rib plate and connecting the second steel plate with the second reinforcing rib plate.
Furthermore, the arc-shaped two ends of the first reinforcing rib are respectively provided with two touch feet, the arc-shaped two ends of the second reinforcing rib are respectively provided with two touch feet, and the touch feet are connected with the reinforcing rib plates through welding steel nails.
Furthermore, rubber pads with the thickness of 2mm are wedged into the contact feet, and the rubber pads are used as pipe wall contact surfaces of the concrete well pipe, so that friction is increased.
Furthermore, the radian convex surface of the touch foot is consistent with the radian of the concave pipe wall of the concrete well pipe, and the shape of the convex surface is matched with that of the concave pipe wall of the concrete well pipe.
Further, three rows of steel nails are uniformly welded on the touch foot, and the length of each steel nail is 50 mm.
Furthermore, a clamping groove is formed in the upper end of the first steel plate, and the second steel plate penetrates through the clamping groove to be fixedly connected with the first steel plate and used for fixing the first steel plate and the upper half part of the second steel plate.
In order to achieve the purpose, the invention also provides a using method of the device for recovering the concrete well pipe of the dewatering well,
firstly, erecting the support on a wellhead of the dewatering well, placing the chain block on the support, and hanging the auxiliary lifting rope on the chain block; then, the gripping apparatus is assembled, the first steel plate and the second steel plate are connected through the adjusting holes according to the diameter of the concrete well pipe, and a connecting point of the first steel plate and the second steel plate is a lower lifting point when the assembly is completed; then, the other end of the auxiliary lifting rope is connected with the lower lifting point, and the gripping apparatus is lowered and extended into the concrete well pipe; then, the main lifting rope is hooked in the lifting hole, the auxiliary lifting rope is taken off, the cross braces are opened along with the hooking of the two ends of the main lifting rope, and the contact feet grasp the wall of the concrete well pipe under tension; and finally, hoisting the concrete well pipe by using the chain block, lifting the well mouth, and recovering the concrete well pipe.
The invention has the advantages and positive effects that: by adopting the technical scheme, the method is simple, convenient and practical, the self-made gripping apparatus is used, the structure is simple, the material selection is convenient, the cost is lower, the recycling frequency is high, the purpose of recycling the well pipe repeatedly can be achieved, the material and the energy are saved, the clamp can be flexibly adjusted according to the weight and the size of the dewatering well, the device is light in weight, strong in adaptability, convenient for field construction and application, and can be widely popularized and used, and great social benefits are created.
Drawings
FIG. 1 is a schematic front view of the auxiliary hoist line connection gripper of the present invention lowered into a concrete well pipe
FIG. 2 is a schematic front view of the main hoist rope attachment gripper of the present invention lifting a concrete well tubular
FIG. 3 is an enlarged front view of the gripper of the present invention
FIG. 4 is an enlarged view of a steel nail for setting a foot contact according to the present invention
FIG. 5 is a side schematic view of FIG. 4
FIG. 6 is a schematic side view of the connection of the first steel plate to the upper half of the second steel plate according to the present invention
In the figure:
1. support 2, chain block 3, main lifting rope
4. Auxiliary lifting rope 5, gripping apparatus 6 and concrete well pipe
7. Lifting hole 8, lower lifting point 9, first steel plate
10. Second steel plate 11, adjusting hole 12 and connecting hole
13. First reinforcing rib plate 14, second reinforcing rib plate 15 and touch foot
16. Clamping groove 17 and steel nail
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings.
In describing the embodiments of the present invention, the perspective view of fig. 1 is defined as a front view of an apparatus for recovering precipitation well concrete well pipes. In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "back", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Referring to fig. 1, the device for recovering the concrete well pipe of the dewatering well comprises a bracket 1, a hoisting device and a gripping apparatus 5. The support 1 is arranged at a wellhead and used for fixing the device for recovering the dewatering well concrete well pipe 6, and the support 1 preferably adopts a steel frame pipe triangular support in the invention. The hoisting device is connected to one end of the support 1 and comprises a chain block 2, a main hoisting rope 3 and an auxiliary hoisting rope 4, the chain block 2 is installed on the support 1, a chain block lifting hook is arranged at the bottom of the chain block 2, the main hoisting rope 3 and the auxiliary hoisting rope 4 are hooked with the chain block 2 through the chain block 2 lifting hook, and the auxiliary hoisting rope 4 is adopted when the lower part of the gripping apparatus 5 needs to be stretched into the concrete well pipe 6; when it is desired to force the gripper 5 up the concrete pipe 6, the main hoist rope 3 is used, and the specific application of the main hoist rope 3 and the auxiliary hoist rope 4 in the present invention will be described in detail below.
Referring to fig. 3, the front enlarged schematic view of the gripping apparatus of the present invention includes a bridging member, a reinforcing rib plate, and a contact foot, wherein the reinforcing rib plate is disposed at the bottom of the bridging member, and the contact foot is disposed on the reinforcing rib plate and is used for gripping a concrete well pipe 6; the top end of the scissor support is provided with a hoisting hole 7, the gripping apparatus 5 is connected with the main lifting rope 3 through the hoisting hole 7, the scissor support comprises two arc-shaped steel plates which are arranged in an axisymmetric mode, the arc-shaped steel plates are respectively a first steel plate 9 and a second steel plate 10, the first steel plate 9 and the second steel plate 10 are X-shaped, the arc-shaped steel plates with the thickness of 2mm and the width of 200mm are preferably adopted in the invention, and the arc length is set to be 500 mm.
Referring to fig. 6, which is a schematic side view of a connection manner of the upper half portions of the first steel plate 9 and the second steel plate 10 of the present invention, the left side of the drawing is shown as the first steel plate 9, and the right side of the drawing is a side view of the connection of the first steel plate 9 and the second steel plate 10, as shown in the drawing, a fastening groove 16 is disposed on the back of the upper end of the first steel plate 9, and the upper end of the second steel plate 10 penetrates through the fastening groove 16 to be fixedly connected with the first steel plate 9, so as to fix the upper half portions of the first steel plate 9 and the. Two adjusting holes 11 with diameters of 30mm are arranged at 3/4 and 4/5 of the first steel plate, the adjusting hole 11 at 3/4 is defined as the first adjusting hole of the first steel plate 9, the adjusting hole 11 at 4/5 is defined as the second adjusting hole of the first steel plate 9, the adjusting holes 11 at 3/4 and 4/5 are also arranged with diameters of 30mm, the adjusting hole 11 at 3/4 is defined as the first adjusting hole of the second steel plate 10, the adjusting hole 11 at 4/5 is defined as the second adjusting hole of the second steel plate 10, the first steel plate 9 is connected with the second steel plate 10 through bolts, the bolt inserts the regulation hole 11 of first steel sheet 9 and second steel sheet 10 in proper order and realizes connecting, and the bolt plays the effect of a axis of rotation, realizes being connected of first steel sheet 9 and second steel sheet 10 lower half. The rotation axis of the device can be adjusted according to the specific diameter of the concrete shaft pipe 6 to realize the size of the cross-bracing opening, specifically, when the diameter of the concrete shaft pipe is increased, the first adjusting hole on the first steel plate 9 and the first adjusting hole on the second steel plate 10 are used, and when the diameter of the concrete shaft pipe 6 is decreased, the second adjusting hole on the first steel plate 9 and the second adjusting hole on the second steel plate 10 are used. The reinforcing rib plates comprise two arc-shaped steel plates which are arranged in an axisymmetrical mode, the axes are symmetric axes of a cross brace and are respectively a first reinforcing rib plate 13 and a second reinforcing rib plate 14, the first reinforcing rib plate 13 is defined as being connected with a first steel plate 9, the second reinforcing rib plate 14 is defined as being connected with a second steel plate 10, and preferably, the reinforcing rib plates are arc-shaped steel plates with the thickness of 2mm and the width of 150mm and the arc length of 150 mm. A connecting hole 12 is formed between the first reinforcing rib plate 13 and the second reinforcing rib plate 14, and the diameter of the connecting hole 12 is preferably 20 mm. For the connection of the first steel plate 9 to the first stiffener plate 13 and the connection of the second steel plate 10 to the second stiffener plate 14.
The arc both ends of first strengthening rib 13 set up two respectively and touch sufficient 15, and the arc both ends of second strengthening rib 14 set up two respectively and touch sufficient 15, touch on sufficient 15 through welding steel nail 17 realize with deep floor's connection. Rubber pads with the thickness of 2mm are wedged into the contact feet 15, and the rubber pads are used as pipe wall contact surfaces with the concrete well pipe 6, so that friction is increased. The radian convex surface of the contact foot 15 is consistent with the radian of the concave pipe wall of the concrete well pipe 6, and the shape is matched. Referring to fig. 4 and 5, an enlarged schematic view and a side view of the touch foot 15, three rows of steel nails 17 are uniformly welded on the touch foot 15, and the length of the steel nails 17 is 50 mm.
The following describes a method for using the device for recovering the concrete well pipe of the dewatering well according to the present invention with reference to specific examples.
Referring to the invention shown in fig. 1, when an auxiliary lifting rope 4 is connected with a gripping apparatus 5 and is lowered into a front schematic view of a concrete well pipe 6, firstly, a support 1 is erected at a wellhead of the dewatering well, a chain block 2 is arranged on the support 1, the auxiliary lifting rope 4 is hung on the chain block 2, at the moment, a main lifting rope 3 is firstly placed, the gripping apparatus 5 is assembled, a first steel plate 9 and a second steel plate 10 are connected through an adjusting hole 11 according to the diameter of the concrete well pipe 6, and a connection point of the first steel plate 9 and the second steel plate 10 is a lower lifting point 8 when the assembly is completed; the device is lowered and extended into a concrete well pipe 6 of a dewatering well by using an auxiliary lifting rope 4 to connect a lower lifting point 8; after the device is placed into a concrete well pipe 6, the main lifting rope 3 is hooked in a lifting hole 7, the auxiliary lifting rope 4 is taken off, the cross braces are opened along with hooks at two ends of the main lifting rope 3, the contact feet 15 are tensioned to grasp the wall of the concrete well pipe 6, force is applied through the main lifting rope 3, force is transmitted to the contact feet 15, reverse pressure is formed between the contact feet 15 and the concrete well pipe 6, and static friction force is generated on the surface. Because concrete well pipe 6 is the sand-free concrete pipe, the contact foot 15 has produced great pressure through the reverse action of bridging with concrete well pipe 6 contact surface for frictional force between the two increases, when the frictional force sum between gripping apparatus 5 and concrete well pipe 6 is greater than the weight of concrete well pipe 6 and the frictional force with soil, can lift concrete well pipe 6, retrieves concrete well pipe 6 at last.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. An apparatus for recovering precipitation well concrete well pipe, comprising:
the support is arranged on a wellhead and used for fixing the device;
the hoisting device is arranged on the support and comprises a chain block, a main hoisting rope and an auxiliary hoisting rope, the chain block is arranged on the support, the bottom of the chain block is provided with a chain block lifting hook, and the main hoisting rope and the auxiliary hoisting rope are connected with the chain block through the chain block lifting hook;
the gripping apparatus comprises a bridging device body, the gripping apparatus body comprises a bridging device body, reinforcing rib plates and a contact foot, the reinforcing rib plates are arranged at the bottom of the bridging device body, the contact foot is arranged on the reinforcing rib plates and used for grasping the concrete well pipe, a hoisting hole is formed in the top end of the bridging device body, and the gripping apparatus body is connected with the main hoisting rope through the hoisting hole.
2. The apparatus for recovering dewatering well concrete well pipe according to claim 1, wherein: the cross brace comprises two arc-shaped steel plates which are axisymmetrically arranged, and the arc-shaped steel plates are respectively a first steel plate and a second steel plate, and the first steel plate and the second steel plate are X-shaped.
3. The apparatus for recovering dewatering well concrete well pipe according to claim 2, wherein: first steel sheet 3/4 and 4/5 department is provided with two regulation hole A, second steel sheet 3/4 and 4/5 department also is provided with two regulation hole B, first steel sheet with the second steel sheet passes through bolted connection, the bolt inserts in proper order regulation hole A with regulation hole B realizes connecting.
4. The apparatus for recovering dewatering well concrete well pipe according to claim 2, wherein: the reinforcing rib plates comprise two arc-shaped steel plates which are arranged in an axial symmetry mode, and the arc-shaped steel plates are respectively a first reinforcing rib plate and a second reinforcing rib plate, and a connecting hole is formed between the first reinforcing rib plate and the second reinforcing rib plate and used for connecting the first steel plate with the first reinforcing rib plate and connecting the second steel plate with the second reinforcing rib plate.
5. The apparatus for recovering dewatering well concrete well pipe according to claim 4, wherein: the arc both ends of first strengthening rib set up two respectively touch the foot, the arc both ends of second strengthening rib set up two respectively touch the foot, touch on the foot through the welding steel nail realize with deep floor's connection.
6. The apparatus for recovering dewatering well concrete well pipe according to claim 5, wherein: rubber pads with the thickness of 2mm are wedged into the contact feet, and the rubber pads are used as pipe wall contact surfaces of the concrete well pipe, so that friction is increased.
7. The apparatus for recovering dewatering well concrete well pipe according to claim 6, wherein: the radian convex surface of the touch foot is consistent with the radian of the concave pipe wall of the concrete well pipe, and the shape of the convex surface is matched with that of the concave pipe wall of the concrete well pipe.
8. The apparatus for recovering dewatering well concrete well pipe according to claim 5, wherein: three rows of steel nails are uniformly welded on the touch foot, and the length of the steel nails is 50 mm.
9. The apparatus for recovering dewatering well concrete well pipe according to claim 3, wherein: the upper end of the first steel plate is provided with a clamping groove, and the second steel plate penetrates through the clamping groove to be fixedly connected with the first steel plate and is used for fixing the first steel plate and the upper half part of the second steel plate.
10. A method of using a device for recovering dewatering well concrete well pipes according to any of claims 1 to 9, characterized in that:
erecting the support at the wellhead of the dewatering well, placing the chain block on the support, and hanging the auxiliary lifting rope on the chain block;
b, assembling the gripping apparatus, connecting the first steel plate and the second steel plate through the adjusting holes according to the diameter of the concrete well pipe, wherein the connecting point of the first steel plate and the second steel plate is a lower lifting point when the assembly is finished;
c, the other end of the auxiliary lifting rope is connected with the lower lifting point, and the gripping apparatus is lowered to extend into the concrete well pipe;
d, hooking the main lifting rope into the lifting hole, removing the auxiliary lifting rope, opening the cross braces along with hooks at two ends of the main lifting rope, and grabbing the wall of the concrete well pipe by the touch feet under tension;
e: and hoisting the concrete well pipe by using the inverted chain, lifting the well mouth, and recovering the concrete well pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911010662.6A CN110803621A (en) | 2019-10-23 | 2019-10-23 | Device for recovering concrete well pipe of dewatering well and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911010662.6A CN110803621A (en) | 2019-10-23 | 2019-10-23 | Device for recovering concrete well pipe of dewatering well and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110803621A true CN110803621A (en) | 2020-02-18 |
Family
ID=69488948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911010662.6A Pending CN110803621A (en) | 2019-10-23 | 2019-10-23 | Device for recovering concrete well pipe of dewatering well and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110803621A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658016A (en) * | 2022-04-06 | 2022-06-24 | 中建八局第一建设有限公司 | Recoverable dewatering well pipe structure and mounting structure and construction method thereof |
-
2019
- 2019-10-23 CN CN201911010662.6A patent/CN110803621A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658016A (en) * | 2022-04-06 | 2022-06-24 | 中建八局第一建设有限公司 | Recoverable dewatering well pipe structure and mounting structure and construction method thereof |
| CN114658016B (en) * | 2022-04-06 | 2023-07-25 | 中建八局第一建设有限公司 | Recoverable dewatering well pipe structure and mounting structure and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217105096U (en) | Deep well support wall concrete pouring and distributing system | |
| CN210976552U (en) | Foldable operation platform device in elevator shaft | |
| CN110803621A (en) | Device for recovering concrete well pipe of dewatering well and using method thereof | |
| CN212336672U (en) | I-steel overhanging bearing frame of basket pull rod for constructional engineering | |
| CN112252589A (en) | Steel reinforcement cage structure and installation method thereof | |
| CN211393579U (en) | Device for recovering concrete well pipe of dewatering well | |
| CN206530032U (en) | Scaffold can be moved integrally | |
| CN206646836U (en) | A kind of exterior wall, inner partition plate movement lifting frame | |
| CN107152026B (en) | A kind of the mud jacking pipe support and its distribution method of steel-pipe pile | |
| CN214219654U (en) | Pipe pole reverse-pulling device | |
| CN212506251U (en) | Reusable steel casing | |
| CN209891072U (en) | Box girder roof reserved hole seals anchor regularization handling frame | |
| CN209413275U (en) | A kind of foldable dismountable feet hand cradle of suspension type | |
| CN221821736U (en) | PCCP pipeline safety internal pulling device | |
| CN219384451U (en) | Culvert lifting device | |
| CN220847570U (en) | Reinforcing cage positioner for spiral bored pile construction | |
| CN214298913U (en) | Swift lifting device who does not destroy tubular product | |
| CN209554624U (en) | Gripping apparatus for recovering concrete well pipe | |
| CN215167216U (en) | Steel reinforcement cage structure | |
| CN214074771U (en) | Safety rope suspension device | |
| CN220433649U (en) | Positioning device for steel pipe pile on water | |
| CN218520968U (en) | Steel reinforcement cage pulls positioner for building installation | |
| CN215857654U (en) | Foundation reinforcing structure | |
| CN110847201B (en) | Open caisson temporary outer wall system capable of being quickly assembled and disassembled and construction method thereof | |
| CN215249253U (en) | Building materials hoisting accessory |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |