CN218027813U - Reverse mould building retaining wall formwork structure between stake of PC worker method - Google Patents
Reverse mould building retaining wall formwork structure between stake of PC worker method Download PDFInfo
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- CN218027813U CN218027813U CN202222258759.2U CN202222258759U CN218027813U CN 218027813 U CN218027813 U CN 218027813U CN 202222258759 U CN202222258759 U CN 202222258759U CN 218027813 U CN218027813 U CN 218027813U
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Abstract
The utility model relates to a PC worker method reverse mould building retaining wall formwork structure between stake, including the hat roof beam, the bottom support of hat roof beam is provided with the steel-pipe pile, is provided with between two adjacent steel-pipe piles and the hat roof beam and excavates the soil layer, steel bar net has been put to the lining, the skin equipartition in the soil layer of excavating, and wherein steel bar net top all implants hat roof beam concrete, excavates the bottom in soil layer and is provided with the sand pack; the template is strutted in the outer layer outside of excavation soil layer, the template top is provided with the false bracket that is used for pouring, the template outside is stupefied, transversely mainly stupefied template reinforcement of carrying on through vertical time. Aiming at the lap joint of upper and lower layers of reinforcing steel bars in the reverse cast concrete construction process, the formwork structure provides a method for filling the bottom of the retaining wall on the upper layer with sand, and the bottom reinforcing steel bars are prevented from being wrapped by concrete. After the excavation of lower part is accomplished, only need can carry out upper and lower floor's reinforcing bar overlap joint welding after cleaning up the sand, avoid chiseling out the mistake work and taking time to upper reinforcing bar parcel part concrete.
Description
Technical Field
The utility model relates to a reverse mould building retaining wall formwork structure between PC worker method stake.
Background
The pile (Pipe-Combination) of the PC construction method is used as a novel enclosure structure, and has the advantages of high construction speed, recyclable main materials, no slurry generated during construction and the like, so that the pile is popularized in the building engineering and the subway foundation pit excavation engineering in coastal areas. When pipelines such as cables and the like cannot be moved and changed within the excavation range of a foundation pit, the support structure at the bottom of the pipeline cannot be constructed before the foundation pit is excavated, the construction of the support structure at the affected section at the bottom of the pipeline is timely completed in the excavation process of the foundation pit, and the foundation pit at the affected section at the bottom is ensured to be safely and smoothly excavated, which is a problem to be solved urgently at present. The traditional similar enclosure structure mostly adopts the hanging net to spray concrete, but only a small part of the enclosure structure, namely the entering concrete spraying machine equipment, has higher manufacturing cost and inconvenient construction, and the hanging net sprayed concrete has more holes and poor compactness and is easy to leak water; in a traditional method for constructing concrete by using a mold among piles, a template support is often required to be supported on a foundation pit soil layer, and the supporting effect is poor and the excavation of the foundation pit is influenced in a foundation pit with a weak stratum.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of prior art, the utility model aims to solve the technical problem that a reverse mould building retaining wall formwork structure between PC worker method stake is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: a reverse mould building retaining wall formwork structure between piles in a PC construction method comprises crown beams, wherein steel pipe piles are supported at the bottoms of the crown beams, an excavation soil layer is arranged between two adjacent steel pipe piles and the crown beams, reinforcing mesh is uniformly arranged on the inner layer and the outer layer of the excavation soil layer, crown beam concrete is implanted at the top ends of the reinforcing mesh, and a sand filling layer is arranged at the bottom of the excavation soil layer; the template has been strutted in the outer side of excavation soil layer, the template top is provided with the false bracket that is used for pouring, the template outside is stupefied, is horizontal mainly stupefied to carry out the template reinforcement through vertical time.
Preferably, the excavation base plane that excavation soil layer is located vertical plane satisfies 400mm with steel-pipe pile outside clear distance.
Preferably, the reinforcing mesh consists of transverse reinforcing steel bars and vertical reinforcing steel bars.
Preferably, the top of the excavated soil layer is provided with a first section of the mold retaining wall positioned at the bottom of the crown beam, and the planting depth of the vertical steel bars planted in the crown beam concrete is 750mm.
Preferably, the inner-layer vertical steel bars and the outer-layer vertical steel bars of the excavated soil layer are steel bars with the diameter of 20mm, and the distance between the inner-layer vertical steel bars and the outer-layer vertical steel bars is 150mm; the inner and outer layers of transverse steel bars are all steel bars with the diameter of 20mm, the distance is 150mm, the outer heads at two ends are downward, and the transverse steel bars are welded with the contact surface of the steel pipe pile; the vertical steel bars and the transverse steel bars are bound and connected by binding wires, and the lacing wires between the inner layer steel bars and the outer layer steel bars are arranged in an encrypted mode according to the interval of 150mm multiplied by 150 mm.
Preferably, the number of the templates is several, and the templates are transversely placed and are vertically butted and assembled; sponge strips are padded at the bottom of the template and at the contact part of the template and the steel pipe pile to prevent slurry leakage.
Preferably, the sand filling layer is positioned within 200mm of the bottom of the template, the sand filling base surface forms an angle of 30 degrees with the horizontal plane, the inner side is low, and the outer side is high.
Preferably, the template of the false bracket adopts a customized steel die, and the customized steel die is welded and fixed with the steel pipe piles on two sides.
Preferably, the vertical secondary ridges are transversely provided with a plurality of ribs and fixed on the wooden template through iron nails; the transverse main edge is made of a steel bar with the diameter of 32mm, two ends of the steel bar are bent in advance at 90 degrees, the length of the elbow is larger than 5 times of the diameter of the steel bar, and the elbow part and the steel pipe pile are subjected to double-side welding.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) The formwork structure is convenient and simple to operate, can be implemented by using the existing materials on a construction site, and does not need to enter a concrete spraying device.
2) The concrete formed by the formwork structure through formwork building has high compactness, high soil retaining strength and good self-waterproof performance, and is superior to sprayed concrete.
3) The mould that this formwork structure formed builds concrete surface smoothness is good, and the back does not have the space behind the purlin installation is enclosed to the steel, and the steel encloses the contact between purlin and steel pipe pile well, is favorable to retaining wall, steel pipe pile and the even atress of steel enclosure purlin, and excavation supporting factor of safety improves.
4) Aiming at the lap joint of upper and lower layers of reinforcing steel bars in the reverse cast concrete construction process, the formwork structure provides a method for filling the bottom of the retaining wall on the upper layer with sand, and the bottom reinforcing steel bars are prevented from being wrapped by concrete. After the lower part excavation is finished, upper and lower layer reinforcing steel bar lap welding can be carried out after only needing to clean up the sand, and the time and labor are saved for chiseling partial concrete of upper layer reinforcing steel bar package.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic view in elevation of the present invention (after the retaining wall is poured).
Fig. 2 is a side view of the construction of the present invention (after the retaining wall is poured).
Fig. 3 is a schematic top view of the present invention (after the wall is poured).
In the figure: 1-crown beam, 2-steel pipe pile, 3-template, 4-vertical secondary ridge, 5-horizontal main ridge, 6-vertical reinforcing steel bar, 7-horizontal reinforcing steel bar, 8-sand filling, 9-steel mould, 10-retaining wall and 11-first section mould building retaining wall.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1 to 3, the embodiment provides a reverse-molded retaining wall formwork structure between piles in a PC construction method, which includes a crown beam, a steel pipe pile supported at the bottom of the crown beam, an excavated soil layer arranged between two adjacent steel pipe piles and the crown beam, reinforcing steel bar meshes arranged on the inner and outer layers of the excavated soil layer, wherein the top ends of the reinforcing steel bar meshes are both embedded with crown beam concrete, and a sand filling layer is arranged at the bottom of the excavated soil layer; the template is strutted in the outer layer outside of excavation soil layer, the template top is provided with the false bracket that is used for pouring, the template outside is stupefied, transversely mainly stupefied template reinforcement of carrying on through vertical time.
The embodiment of the utility model provides an in, excavation basal plane and the steel-pipe pile outside clear distance that excavation soil layer lies in on the vertical plane satisfy 400mm.
In the embodiment of the present invention, the reinforcing mesh is composed of the horizontal steel bars and the vertical steel bars.
The embodiment of the utility model provides an in, the top of excavation soil layer is provided with the first section mould that is located crown beam bottom and builds retaining wall, and the bar planting degree of depth that crown beam concrete was implanted to vertical reinforcing bar is 750mm.
In the embodiment of the utility model, the inner and outer vertical steel bars of the excavated soil layer are all steel bars with the diameter of 20mm and the distance of 150mm; the inner and outer layers of transverse steel bars are both steel bars with the diameter of 20mm, the distance is 150mm, the outer heads at two ends are downward, and the transverse steel bars are welded with the contact surface of the steel pipe pile; the vertical steel bars and the transverse steel bars are bound and connected by binding wires, and the lacing wires between the inner steel bars and the outer steel bars are arranged in an encrypted way according to the interval of 150mm multiplied by 150 mm.
In the embodiment of the utility model, the number of the templates is several, and the templates are transversely placed and are assembled in a vertical butt joint manner; sponge strips are padded at the bottom of the template and the contact part of the template and the steel pipe pile to prevent slurry leakage.
In the embodiment of the utility model provides an in, the sand filling layer is located template bottom 200mm within range, and the sand filling base face is 30 degrees with the horizontal plane, and the inboard is low, and the outside is high.
The embodiment of the utility model provides an in, the template of false bracket adopts the customization steel mould, customization steel mould and both sides steel-pipe pile welded fastening.
In the embodiment of the utility model, a plurality of vertical secondary ridges are transversely arranged and fixed on a wooden template through iron nails; the transverse main edge is made of a steel bar with the diameter of 32mm, two ends of the steel bar are bent in advance at 90 degrees, the length of the elbow is larger than 5 times of the diameter of the steel bar, and the elbow part and the steel pipe pile are subjected to double-side welding.
The embodiment of the utility model provides an in, adopt this PC worker method reverse mould between stake to build retaining wall formwork structure and carry out the construction steps that the barricade was pour and do:
(1) Digging and leveling soil layer between piles at bottom of pipeline
1) Soil layer excavation
And excavating the soil layer of the retaining wall part at the lower part of the pipeline by adopting a manual matching machine. The inter-pile retaining wall is constructed from top to bottom strictly according to the condition that one meter is excavated and supported for one meter. Implement according to the excavation scheme strictly among the excavation process, strictly forbid the excavation too deeply, be located vertical plane's excavation base face and steel-pipe pile outside clear distance satisfy 400mm retaining wall thickness can. The construction site is provided with emergency equipment and materials, and the ground is provided with special people for monitoring to prevent emergency.
2) Basal plane leveling
And in the excavation process, leveling treatment of a base surface is well performed. The surface soil of the steel pipe pile is quickly cleaned, conditions are provided for connection between the subsequent steel bar welding and reinforced mould-built concrete retaining wall and the steel pipe pile, and a water leakage channel is prevented from being formed.
3) Chisel hair
And (3) roughening the bottom of the retaining wall with the upper poured section (or the top beam) in a mould building manner, so that the adhesive force between upper and lower concrete is enhanced.
(2) Binding and welding of steel bars of retaining wall between piles
1) Manufacture of steel bar
According to the distance between the inner layer steel pipe pile and the outer layer steel pipe pile, the length of the transverse steel bar and the vertical steel bar is determined (the length of welding elbows at two ends needs to be considered), the two ends of the steel bar are bent by 90 degrees, the length of the elbows needs to meet the requirement of welding length (the double-side welding is more than 5 times of the diameter of the steel bar, and the single-side welding is more than 10 times of the diameter of the steel bar), and the steel bar is convenient to weld with the steel pipe pile.
2) Crown beam embedded steel bar
The retaining wall is built to first section mould because of in hat roof beam bottom, need carry out the bar planting to hat roof beam before the vertical reinforcement, and the bar planting degree of depth is 750mm.
3) Installation of reinforcing bars
The vertical reinforcing steel bars of the inner layer and the outer layer of the retaining wall of other molding sections except the first section adopt reinforcing steel bars with the diameter of 20mm, the interval is 150mm, and the upper reinforcing steel bars are welded and lapped with the reserved reinforcing steel bars of the retaining wall; the inner and outer layers of transverse steel bars are both steel bars with the diameter of 20mm, the distance is 150mm, the outer heads at two ends are downward, and the transverse steel bars are welded with the contact surface of the steel pipe pile; the vertical steel bars and the transverse steel bars are bound and connected by binding wires, and the lacing wires between the inner steel bars and the outer steel bars are arranged in an encrypted way according to the interval of 150mm multiplied by 150 mm.
(3) Formwork installation and reinforcement
(1) Before the templates are installed, templates are cleaned to avoid the phenomenon of sticking, a flat shovel is used for cleaning the surfaces of the templates, concrete residues are shoveled off, a rolling brush is used for brushing an oil release agent, and cleaning the surfaces of the templates with attached oil by using a cleaning cloth. And mounting a protective layer cushion block on the steel bar, and erecting an outer side template according to the measurement control line. The large wood formwork is transversely placed and is assembled in an up-and-down butt joint mode.
(2) In order to facilitate the welding of the bottom steel bars and the steel bars of the next retaining wall layer, the bottom of the formwork is filled with sand within 200mm, the sand filling base surface and the horizontal plane form a 30-degree angle, the inner side is low (the depth is more than 10 times of the diameter of the steel bars), the outer side is high, and the concrete is prevented from wrapping all the bottom steel bars. After the lower part excavation is accomplished, only need can be in order to go on lower floor steel bar welding after cleaning up the sand, avoid the concrete chisel to remove the mistake work and take time.
(3) Concrete at the top of each section of retaining wall is poured by adopting a mode of arranging a false bracket, a bracket template adopts a customized steel mould, and the steel mould is welded and fixed with the steel pipe piles at two sides.
(4) And fixing a vertical secondary edge at the back of the wood template, and fixing the wood template on the vertical secondary edge by using iron nails. Sponge strips are padded at the bottom of the template and the contact part of the template and the steel pipe pile to prevent slurry leakage.
(5) And after the template and the vertical secondary beam are installed, the transverse main beam is installed. The transverse main edge adopts a steel bar with the diameter of 32mm, two ends of the steel bar are bent in advance at 90 degrees, the length of the elbow is more than 5 times of the diameter of the steel bar, and the elbow part and the steel pipe pile are subjected to double-side welding. After the template is reinforced, the welding quality of the steel bar and the steel pipe pile is checked, whether the template is in tight splicing, whether staggered platforms exist on two sides of the splicing, and whether two ends and the bottom are compact or not are judged.
(4) Reverse concrete pouring
The concrete for the mold-cast retaining wall is cast by C30 concrete. The pouring process flow is as follows:
1) Inspection before casting
(1) Before pouring, the binding and welding quality of the steel bars are checked again, and the installation distance, the number, the welding quality and the like are ensured to meet the design requirements; and the reinforcing condition of the template, the density of the two ends and the bottom are checked again, so that slurry leakage in the pouring process is avoided.
(2) And (3) performing slump inspection on the concrete entering the field, wherein the slump is controlled to be 120-160mm, and the air content after vibration is controlled to be 3-5% when the concrete mixture is put into a bin.
2) Pouring of concrete
(1) The concrete construction adopts 1 concrete pump to pour retaining wall concrete, and soft concrete pump pipe inserts in the framework of steel reinforcement. Symmetrically pouring concrete on two sides, discharging in a layered mode, vibrating in a layered mode, wherein the layered thickness of the concrete is 300 to 500mm, and the pouring time interval of the upper layer and the lower layer cannot exceed the initial setting time of the concrete.
(2) Concrete vibration is an important construction process for ensuring internal and external light of concrete and waterproof effect, and a vibration chamber must be ensured, and a vibrating rod is forbidden to be adopted for material driving. The concrete is vibrated by a phi 30 flexible shaft plug-in vibrator, the concrete is vibrated for a well controlled time, a vibrating rod is used for fast plugging and slow pulling, the vibrating time is controlled within 10 to 30 seconds, and the concrete does not significantly sink or bubble on the surface until the surface of the concrete is level and is muddy. And each rod is inserted into the concrete at the lower part of the mould and is not less than 50mm, and the vibrating rod keeps a certain distance from the side mould.
(3) Whether the slurry leakage condition exists in the gaps at the bottom and the two sides of the template or not needs to be observed in the pouring process, and the slurry leakage is found and should be blocked in time, so that the waste of concrete is avoided. And meanwhile, the connection condition of the transverse main corrugated steel bars and the steel pipe pile is observed, the pouring is stopped in time when the welded steel bars fall off, and the pouring is carried out after the template is reinforced and the stress meets the requirements.
(4) When concrete at the top false bracket is poured, attention needs to be paid to the fact that the vibrating rod does not touch the steel formwork until the concrete surface is horizontal and does not sink remarkably, no air bubbles are generated, and surface grout is generated.
(5) Form panel removal
And after the strength of the concrete reaches 2.5MPa, firstly removing the template at the position of the false bracket, and chiseling the concrete at the protruding part of the false bracket in time. And the templates at other parts are removed after the concrete reaches the strength.
(6) Concrete curing
After the concrete pouring is finished, the curing is started within 12 hours, and tap water which does not corrode the concrete is used for curing. And covering the base concrete subjected to form removal with geotextile for wet water curing.
The construction method has the following advantages:
1) The construction method is convenient and simple to operate, can be implemented by using the existing materials on the construction site, and does not need to enter a concrete spraying device.
2) The concrete formed by the construction method through molding has high compactness, high soil retaining strength and good self-waterproofness, and is superior to sprayed concrete.
3) The surface smoothness of the molded concrete formed by the construction method is good, no gap exists at the back of the installed steel enclosing purlin, the contact between the steel enclosing purlin and the steel pipe pile is good, the uniform stress of the retaining wall, the steel pipe pile and the steel enclosing purlin is facilitated, and the safety coefficient of foundation pit support is improved.
4) The construction method fully utilizes the steel characteristics of the steel pipe of the pile in the PC construction method, the steel bars in the retaining wall and the steel pipe pile are connected in a welding way and stressed together, and a reliable and complete enclosure structure system is formed. Compared with other building envelopes, such as the cast-in-situ bored pile, the retaining wall formed by the method is simpler to operate and more stable in stress.
5) In the construction method, the transverse main ridges are reinforced by the template by adopting steel bars (steel pipes can be adopted when the stress is large), and the steel bars and the steel pipe piles on two sides are welded and fixed. Compared with other similar structure templates, the form of square timber and external ground diagonal bracing (poor applicability to a weak stratum) is adopted for reinforcement, the operation is simpler, the support is reliable, the foundation pit stratum is not influenced, and the excavation of the foundation pit is not influenced.
6) Aiming at the lap joint of upper and lower layers of reinforcing steel bars in the reverse cast concrete construction process, the scheme provides a method for filling the bottom of the retaining wall of the upper layer with sand, and the bottom reinforcing steel bars are prevented from being wrapped by concrete. After the lower part excavation is finished, upper and lower layer reinforcing steel bar lap welding can be carried out after only needing to clean up the sand, and the time and labor are saved for chiseling partial concrete of upper layer reinforcing steel bar package.
7) To the upper and lower floor concrete contact that appears in the reverse mould concrete work progress untight phenomenon, this scheme adopts the mode that sets up false bracket to pour, and the bracket template adopts the customization steel mould, through its and both sides steel-pipe pile welded fastening, convenient operation has ensured that upper and lower floor's new and old concrete placement is closely knit.
8) The pile (Pipe-Combination) of the PC construction method is used as a novel enclosure structure, and has the advantages of high construction speed, recyclable main materials, no mud generated during construction and the like, and is popularized in the building and subway foundation pit excavation engineering in coastal areas. Aiming at the position where the steel pipe pile cannot be constructed due to ground obstacles, the scheme provides the retaining wall formwork structure built by reverse formwork among the piles in the PC construction method, the welding action of the piles and the steel bars in the PC construction method can be fully utilized by binding the steel bars and reinforcing the formwork, the operation is convenient, and the formed retaining wall has high strength and good water stopping performance.
9) The scheme promotes the application of the pile in the PC construction method, and has positive significance in responding to the decision of realizing the double-carbon target in the country and popularizing the application of green low-carbon building materials in construction.
In conclusion, the construction method is novel and reasonable, the operation is convenient and simple, the construction speed is high, the construction cost is low, and the formed retaining wall has high strength and good water stopping performance; on the premise of ensuring safety, the excavation construction of the foundation pit is not influenced. Has positive significance in promoting the application of green low-carbon building materials in construction.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a reverse mould building retaining wall formwork structure between PC worker method stake, includes the hat roof beam, the bottom sprag of hat roof beam is provided with steel-pipe pile, its characterized in that: an excavated soil layer is arranged between the two adjacent steel pipe piles and the crown beams, reinforcing mesh is uniformly arranged on the inner layer and the outer layer of the excavated soil layer, crown beam concrete is implanted into the top ends of the reinforcing mesh, and a sand filling layer is arranged at the bottom of the excavated soil layer; the template is strutted in the outer layer outside of excavation soil layer, the template top is provided with the false bracket that is used for pouring, the template outside is stupefied, transversely mainly stupefied template reinforcement of carrying on through vertical time.
2. The PC construction method reverse building retaining wall formwork structure between piles according to claim 1, characterized in that: the clear distance between the excavation base plane of the excavation soil layer on the vertical plane and the outer side of the steel pipe pile meets 400mm.
3. The PC construction method reverse building retaining wall formwork structure between piles according to claim 1, characterized in that: the reinforcing mesh consists of transverse reinforcing steel bars and vertical reinforcing steel bars.
4. The reverse modular construction retaining wall formwork structure between piles of PC worker method of claim 3, characterized in that: the top of excavation soil layer is provided with the first section mould that is located the crown beam bottom and builds retaining wall, and the planting muscle degree of depth that crown beam concrete was implanted to vertical reinforcing bar is 750mm.
5. The reverse modular construction retaining wall formwork structure between piles of PC worker method of claim 3, characterized in that: the inner-layer vertical steel bars and the outer-layer vertical steel bars of the excavated soil layer are steel bars with the diameter of 20mm, and the distance between the inner-layer vertical steel bars and the outer-layer vertical steel bars is 150mm; the inner and outer layers of transverse steel bars are both steel bars with the diameter of 20mm, the distance is 150mm, the outer heads at two ends are downward, and the transverse steel bars are welded with the contact surface of the steel pipe pile; the vertical steel bars and the transverse steel bars are bound and connected by binding wires, and the lacing wires between the inner layer steel bars and the outer layer steel bars are arranged in an encrypted mode according to the interval of 150mm multiplied by 150 mm.
6. The PC construction method reverse building retaining wall formwork structure between piles according to claim 1, characterized in that: the number of the templates is a plurality, and the templates are transversely placed and are vertically butted and assembled; sponge strips are padded at the bottom of the template and the contact part of the template and the steel pipe pile to prevent slurry leakage.
7. The PC construction method reverse building retaining wall formwork structure between piles according to claim 1, characterized in that: the sand filling layer is positioned in the range of 200mm at the bottom of the template, the sand filling base surface forms an angle of 30 degrees with the horizontal plane, the inner side is low, and the outer side is high.
8. The PC construction method reverse building retaining wall formwork structure between piles according to claim 1, characterized in that: the template of the false bracket adopts a customized steel die, and the customized steel die is welded and fixed with the steel pipe piles on the two sides.
9. The PC construction method reverse building retaining wall formwork structure between piles according to claim 1, characterized in that: the vertical secondary ridges are transversely provided with a plurality of bars and fixed on a wooden template through iron nails; the transverse main edge is made of a steel bar with the diameter of 32mm, two ends of the steel bar are bent for 90 degrees in advance, the length of the elbow is larger than 5 times of the diameter of the steel bar, and the elbow part and the steel pipe pile are subjected to double-side welding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115262624A (en) * | 2022-08-26 | 2022-11-01 | 中电建铁路建设投资集团有限公司 | Construction method for reverse molding retaining wall between piles in PC construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115262624A (en) * | 2022-08-26 | 2022-11-01 | 中电建铁路建设投资集团有限公司 | Construction method for reverse molding retaining wall between piles in PC construction method |
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