CN108086319B - Pulling-out device for precast concrete supporting wall - Google Patents
Pulling-out device for precast concrete supporting wall Download PDFInfo
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- CN108086319B CN108086319B CN201810113427.0A CN201810113427A CN108086319B CN 108086319 B CN108086319 B CN 108086319B CN 201810113427 A CN201810113427 A CN 201810113427A CN 108086319 B CN108086319 B CN 108086319B
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- supporting wall
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- 239000011178 precast concrete Substances 0.000 title claims abstract description 146
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 239000004567 concrete Substances 0.000 claims abstract description 30
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 170
- 239000010959 steel Substances 0.000 claims description 170
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses a pulling-out device for a precast concrete support wall, and belongs to the field of concrete support structures. The vertical hollow tube is embedded in the precast concrete supporting wall, the pulling-out device comprises a pulling-out mechanism penetrating through the hollow tube, the lower end of the pulling-out mechanism is fixedly arranged inside the precast concrete supporting wall and located at the lower end of the hollow tube, a first fixing device used for stretching the pulling-out mechanism is arranged at the upper end of the pulling-out mechanism, and the first fixing device is not connected with the precast concrete supporting wall. The invention can effectively avoid the damage of the concrete when the concrete support wall is pulled out, and prolong the service life of the concrete support wall.
Description
Technical Field
The invention relates to the field of concrete supporting structures, in particular to a pulling-out device for a precast concrete supporting wall.
Background
The foundation pit supporting structure is used for protecting the safety of the construction of an underground main body structure and the surrounding environment of a foundation pit, adopts temporary supporting, reinforcing, protecting, groundwater control and other measures for the foundation pit, and is commonly used for foundation pit support, slope protection engineering and the like.
After the foundation pit supporting structure is used, the foundation pit supporting structure is pulled out of the foundation pit for the next cyclic use, the concrete supporting wall is adopted in the foundation pit, the head of the concrete supporting wall is clamped by the clamping head of the pile extractor when the existing concrete supporting wall is pulled out, the vibrating machine is matched for vibrating, the lifting hook is pulled up along with the amplitude of the vibrating machine to enable the concrete supporting wall to be lifted slowly, and the vibrating machine body stops vibrating until a crane can directly lift the concrete supporting wall. The pull-out mode makes the top of the concrete support wall easily damaged under the repeated hammering and pull-out actions, and the whole concrete support wall is pulled when pulled out, so that the tensile property of the concrete is poor and the damage is easy to occur.
Disclosure of Invention
The invention aims to solve the technical problem of providing the extracting device for the precast concrete support wall, which can effectively avoid the concrete from being damaged when the concrete support wall is extracted and prolong the service life of the concrete support wall.
In order to solve the technical problems, the invention provides the following technical scheme:
a pull-out device for precast concrete props up wall, pre-buried vertical hollow tube that has in the precast concrete props up wall, pull-out device is including wearing to locate pull-out mechanism in the hollow tube, pull-out mechanism's lower extreme fixed set up in precast concrete props up wall is inside and be located hollow tube lower extreme, pull-out mechanism's upper end is provided with the first fixing device that is used for stretching and drawing out the mechanism, be not connected between first fixing device and the precast concrete props up wall.
Further, the pulling mechanism is a first steel strand, the first fixing device comprises a lifting beam, a first steel strand clamp and a first anchor pad arranged between the upper end face of the lifting beam and the first steel strand clamp, the upper end of the first steel strand penetrates through the lifting beam and is fixed at the upper end of the lifting beam through the first steel strand clamp, and the lifting beam is in contact with the upper end face of the precast concrete supporting wall under the action of the first steel strand.
Further, the lower extreme of lifting beam is provided with first U type guard plate, precast concrete support wall card is established the U type inslot of first U type guard plate, be provided with on the first U type guard plate and be used for passing the through-hole of first steel strand wires.
Further, the side of the U-shaped groove of the first U-shaped protection plate is an arc surface, the center of the arc surface is located at the outer side of the first U-shaped protection plate, and stiffening ribs are arranged at the outer side of the first U-shaped protection plate.
Further, the pulling mechanism is a second steel strand, a groove is formed in the upper end of the precast concrete supporting wall, a second U-shaped protection plate is arranged in the groove, the first fixing device comprises rectangular steel and a second steel strand clamp, the rectangular steel is arranged on the upper end face of the second U-shaped protection plate and located in the groove, the upper end of the rectangular steel is open, a lifting hole is formed in the side wall of the rectangular steel, the second steel strand clamp is arranged in the rectangular steel, the upper end of the second steel strand penetrates through the second U-shaped protection plate and the rectangular steel and is fixed on the rectangular steel through the second steel strand clamp, and the rectangular steel is in contact with the end face of the groove under the action of the second steel strand.
Further, a second fixing device for fixing the first steel strand or the second steel strand is embedded in the precast concrete support wall at the lower end of the hollow pipe, the second fixing device comprises a second anchor backing plate at the lower end of the hollow pipe, and a third steel strand clamp is arranged below the second anchor backing plate.
Further, the bottom of precast concrete support wall is provided with the protection steel sheet, second fixing device and protection steel sheet welded connection.
Further, the protection steel plate is detachably connected to the bottom end of the precast concrete support wall, and a stiffening rib extending to the inside of the precast concrete support wall is arranged on the inner side of the protection steel plate, or concrete extending to the inside of the precast concrete support wall is poured on the inner side of the protection steel plate.
Further, the pulling mechanism is a steel suspender, an external thread is arranged at the upper end of the steel suspender, the first fixing device comprises a sleeve provided with an internal thread, the lower end of the sleeve is in threaded connection with the upper end of the steel suspender, and a hanging ring is in threaded connection with the upper end of the sleeve.
Further, the upper end face of the precast concrete support wall is provided with a preformed hole which is coaxial with and communicated with the hollow pipe, and the diameter of the preformed hole is larger than that of the hollow pipe.
Compared with the prior art, the invention has the following beneficial effects:
when the pulling-out device for the precast concrete supporting wall is used for manufacturing the precast concrete supporting wall, the vertical hollow pipe is embedded in the precast concrete supporting wall, the pulling-out mechanism penetrates through the hollow pipe, the lower end of the pulling-out mechanism is fixed in the precast concrete supporting wall, and the upper end of the pulling-out mechanism can be freely placed in the hollow pipe and extends to the upper part of the precast concrete supporting wall. When the prefabricated concrete support wall is required to be pulled out after being used, the upper end of the pulling mechanism is fixed on the first fixing device, then the first fixing device is fixed on the crane or the crane, and the crane or the crane is started to hoist the prefabricated concrete support wall.
In the process of lifting the precast concrete supporting wall, the first fixing device is only fixedly connected with the upper end of the pulling mechanism and is not actually fixedly connected with the precast concrete supporting wall, when the crane or the travelling crane drives the first fixing device to ascend, the first fixing device drives the pulling mechanism to ascend, and the pulling mechanism applies the bottom-to-top pressure on the precast concrete supporting wall at the bottom of the precast concrete supporting wall, so that the precast concrete supporting wall is integrally stressed when pulled out, the stress is reasonable, the compression resistance of concrete can be fully utilized, the concrete is effectively prevented from being damaged, and the service life and the recycling rate of the precast concrete supporting wall are improved.
Drawings
Fig. 1 is a front view of embodiment 1 of the extracting device for precast concrete supporting walls of the present invention;
fig. 2 is a front view of a first fixing device in embodiment 1 of the extracting device for a precast concrete supporting wall according to the present invention;
fig. 3 is a side view of a first fixing device in embodiment 1 of the extracting device for a precast concrete supporting wall according to the present invention;
FIG. 4 is an enlarged schematic view of a portion A of FIG. 2;
fig. 5 is a partial front view of embodiment 2 of the extracting device for precast concrete supporting wall according to the present invention;
FIG. 6 is a partial side view of embodiment 2 of the extraction device for precast concrete support walls of the present invention;
fig. 7 is a partial front view of embodiment 3 of the extracting device for precast concrete supporting wall of the present invention;
FIG. 8 is a partial side view of embodiment 3 of the extraction device for precast concrete segment walls of the present invention;
FIG. 9 is a partial side view of the upper portion of embodiment 3 of the extraction device for precast concrete support walls of the present invention;
FIG. 10 is a partial side view of the lower portion of embodiment 3 of the extraction device for precast concrete support walls of the present invention;
fig. 11 is a schematic structural view of a second fixing device in embodiment 1 and embodiment 2 of the extracting device for a precast concrete supporting wall according to the present invention;
fig. 12 is a schematic structural view of the detachable armor plate of the drawing-out apparatus for precast concrete supporting walls of the present invention in embodiment 1 and embodiment 2;
fig. 13 is a schematic structural view of the preformed holes in example 1 and example 4 of the extracting device for precast concrete supporting walls according to the present invention;
fig. 14 is a schematic view showing the structure of the tip in embodiment 1 of the extracting device for precast concrete supporting walls according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The invention provides a pulling-out device for a precast concrete supporting wall, as shown in fig. 1 to 14, wherein a vertical hollow pipe 1-1 is embedded in the precast concrete supporting wall 1, the pulling-out device comprises a pulling-out mechanism penetrating through the hollow pipe 1-1, the lower end of the pulling-out mechanism is fixedly arranged in the precast concrete supporting wall 1 and positioned at the lower end of the hollow pipe 1-1, a first fixing device 4 for stretching the pulling-out mechanism is arranged at the upper end of the pulling-out mechanism, and the first fixing device is not connected with the precast concrete supporting wall.
When the pulling-out device for the precast concrete supporting wall is used for manufacturing the precast concrete supporting wall 1, the vertical hollow pipe 1-1 is embedded in the precast concrete supporting wall 1, the pulling-out mechanism penetrates through the hollow pipe 1-1, the lower end of the pulling-out mechanism is fixed in the precast concrete supporting wall 1, and the upper end of the pulling-out mechanism can be freely placed in the hollow pipe 1-1 and extends to the upper part of the precast concrete supporting wall 1. When the precast concrete supporting wall 1 is required to be pulled out after being used, the upper end of the pulling mechanism is fixed on the first fixing device 4, then the first fixing device 4 is fixed on a crane or a travelling crane, and the crane or the travelling crane is started to hoist the precast concrete supporting wall 1.
In the process of lifting the precast concrete supporting wall 1, the first fixing device 4 is only fixedly connected with the upper end of the pulling mechanism and is not actually fixedly connected with the precast concrete supporting wall 1, when the crane or the travelling crane drives the first fixing device 4 to ascend, the first fixing device 4 drives the pulling mechanism to ascend, and the pulling mechanism applies the bottom-to-top pressure on the precast concrete supporting wall 1 at the bottom of the precast concrete supporting wall 1, so that the precast concrete supporting wall 1 is integrally stressed during pulling, the stress is reasonable, the compressive capacity of concrete can be fully utilized, the concrete is effectively prevented from being damaged, and the service life and the recycling rate of the precast concrete supporting wall 1 are improved.
In the invention, the pulling mechanism can adopt the structural form of a steel strand or a steel suspender, and several embodiments of the pulling mechanism are given:
example 1:
as shown in fig. 1 to 4, the extracting mechanism may be a first steel strand 2, the first fixing device 4 preferably comprises a lifting beam 4-2 and a first steel strand clamp 4-1, the upper end of the steel strand 2 passes through the lifting beam 4-2 and is fixed at the upper end of the lifting beam 4-2 through the first steel strand clamp 4-1, and the lifting beam 4-2 is contacted with the upper end surface of the precast concrete supporting wall 1 under the action of the first steel strand 2. According to the structure, the lifting beam 4-2 is arranged between the first steel strand clamp 4-1 and the precast concrete supporting wall 1, so that the lifting beam 4-2 is in contact with the upper end face of the precast concrete supporting wall 1, and a crane or a travelling crane drives the first steel strand 2 to ascend through the lifting beam 4-2, so that the precast concrete supporting wall 1 is pulled out from the bottom. In addition, the first steel strand clamp 4-1 is in contact with the upper end surface of the precast concrete supporting wall 1 through the lifting beam 4-2, and is not in direct contact with the upper end surface of the precast concrete supporting wall 1, so that the contact area between the first steel strand clamp 4-1 and the precast concrete supporting wall 1 is increased, and the concrete at the lifting point can be prevented from being locally damaged.
In the above embodiment 1, in order to further prevent the lifting beam 4-2 from being locally damaged at the lifting point, a first anchor pad 4-4 may be further provided between the upper end surface of the lifting beam 4-2 and the first strand clamp 4-1 to increase the contact area between the first strand clamp 4-1 and the lifting beam 4-2.
In the above embodiment 1, in order to prevent the lifting beam 4-2 from rotating relative to the precast concrete supporting wall 1 during the process of pulling out the precast concrete supporting wall 1, and further to affect the pulling out of the precast concrete supporting wall 1, the lower end of the lifting beam 4-2 is preferably provided with the first U-shaped protection plate 4-3, the precast concrete supporting wall 1 is clamped in the U-shaped groove of the first U-shaped protection plate 4-3, and the first U-shaped protection plate 4-3 is provided with the through hole 4-3-1 for passing through the first steel strand 2. As shown in fig. 2, the first U-shaped protection plate 4-3 is used to be clamped on the width direction of the precast concrete supporting wall 1.
The first U-shaped protection plate 4-3 can be further connected with the side face of the precast concrete support wall 1 by bolts to further prevent the lifting beam 4-2 from rotating, wherein the side face of the precast concrete support wall 1 is pre-embedded with an inner wire sleeve 1-3 for bolt connection, the first U-shaped protection plate 4-3 is provided with a long round hole 4-3-2 in the vertical direction, and the long round hole prevents the lifting beam 4-2 from being stressed when being lifted.
In addition, lifting lugs 4-7 for lifting can be welded on the lifting beam 4-2.
Preferably, in the above embodiment 1, as shown in fig. 4, the side surface of the U-shaped groove of the first U-shaped protection plate 4-3 may be an arc surface 4-3-2, the center of the arc surface is located at the outer side of the first U-shaped protection plate 4-3, and a stiffening rib 4-5 for reinforcing the connection strength between the first U-shaped protection plate 4-3 and the lifting beam 4-2 is disposed at the outer side of the first U-shaped protection plate 4-3. The arc surface is made on the side surface of the U-shaped groove of the first U-shaped protection plate 4-3, so that the precast concrete supporting wall 1 can be prevented from damaging concrete on the side surface of the precast concrete supporting wall 1 in the pulling-out process.
Example 2:
as shown in fig. 5 and 6, the pulling mechanism may be a second steel strand 2', the upper end of the precast concrete supporting wall 1 is provided with a groove 5, a second U-shaped protection plate 6 is disposed in the groove 5, the first fixing device 4 includes a first rectangular steel 4-1' disposed on the upper end surface of the second U-shaped protection plate 6 and located in the groove 5, and a second steel strand clamp 4-2', the upper end of the first rectangular steel 4-1' is open, a lifting hole 4-3 'is disposed on the side wall of the first rectangular steel 4-1', the second steel strand clamp 4-2 'is disposed in the rectangular steel 4-1', the upper end of the second steel strand 2 'passes through the second U-shaped protection plate 6 and the first rectangular steel 4-1' and is fixed on the first rectangular steel 4-1 'by the second steel strand clamp 2', and the first rectangular steel 4-1 'contacts with the end surface of the groove 5 under the action of the second steel 2'. In this embodiment, the groove 5 is generally long in the width direction of the precast concrete segment wall 1, and the second U-shaped protection plate 6 may be pre-buried in the precast concrete segment wall 1 at the position of the groove 5. When the precast concrete supporting wall 1 is lifted, a steel rod is penetrated in the lifting hole 4-3', and a crane or a travelling crane drives the first rectangular steel 4-1' to ascend through the lifting steel rod, so that the precast concrete supporting wall 1 is pulled out from the bottom. Wherein, the top surface of the second U-shaped protection plate 6 and the top surface of the rectangular steel 4-1 'are lower than the top surface of the precast concrete supporting wall 1, so that the top surface of the second U-shaped protection plate 6 and the rectangular steel 4-1' can be prevented from being damaged when the precast concrete supporting wall 1 is installed and hammered.
Example 3:
as shown in fig. 7 and 8, the first fixing device 4 employs a U-shaped steel plate 4-1 "instead of the first rectangular steel 4-1' in embodiment 2, and the rest of the structure is the same as that of embodiment 2. In addition, in order to reduce deformation of the U-shaped steel plate 4-1 "at the time of lifting, a steel plate or a second rectangular steel 4-4" may be detachably connected to the inner side wall of the U-shaped steel plate 4-1 "at a position corresponding to the lifting hole 4-3".
Example 4:
as shown in fig. 9 and 10, the extracting mechanism may be a steel hanger rod 2' ", an external thread is provided at an upper end of the steel hanger rod 2 '", the first fixing device 4 includes a sleeve 4-1' "provided with an internal thread, a lower end of the sleeve 4-1 '" is in threaded connection with an upper end of the steel hanger rod 2' "or directly welds the steel hanger rod 2 '" with the sleeve 4-1' ", and a hanging ring 4-2 '" is in threaded connection with an upper end of the sleeve 4-1' ". The sleeve 4-1 '"is directly screwed on the steel suspender 2'" and is not connected with or contacted with the precast concrete support wall 1, and when a crane or a travelling crane lifts the precast concrete support wall 1, the hanging ring 4-2 'is connected to a crane or a travelling crane to drive the steel hanging rod 2' to ascend, so that the precast concrete supporting wall 1 is pulled out from the bottom.
In the above embodiments 1 and 2, in order to enhance the connection strength between the first steel strand 2 or the second steel strand 2 'and the precast concrete supporting wall 1, the second fixing device 3 for fixing the first steel strand 2 or the second steel strand 2' is preferably pre-embedded at the lower end of the hollow tube 1-1 in the precast concrete supporting wall 1, the second fixing device 3 includes the second anchor pad 3-1 at the lower end of the hollow tube 1-1, and the third steel strand clamp 3-2 is disposed below the second anchor pad 3-1.
Besides the above structure, the second fixing device 3 can be adopted, and a person skilled in the art can select other fixing devices for the ends of the steel strands according with the above principle, for example, a hanging ring is embedded in the precast concrete supporting wall 1, and the lower ends of the first steel strand 2 or the second steel strand 2' are fixed on the hanging ring, so that the implementation of the technical scheme of the invention is not affected.
In the above embodiments 1 to 4, the bottom end of the precast concrete segment wall 1 is preferably provided with the protective steel sheet 1-2, wherein in embodiments 1 and 2, as shown in fig. 11, the second fixing means 3 is welded to the protective steel sheet 1-2. In example 3, as shown in fig. 10, a steel boom 2' "was directly welded to a steel shield plate 1-2. The protection steel plate 1-2 not only can prevent the precast concrete supporting wall 1 from being damaged when being put into and pulled out of the foundation pit, but also can reduce the friction resistance and increase the local compressive strength of the concrete when the precast concrete supporting wall 1 is put into and pulled out of the soil, and the welding connection of the second fixing device 3 and the protection steel plate 1-2 further increases the fixing strength of the second fixing device 3 at the bottom of the precast concrete supporting wall 1.
As a modification of the above embodiments 1 to 3, the shield steel plate 1-2 is preferably detachably attached to the bottom end of the precast concrete segment 1. As shown in fig. 12, the protection steel plate 1-2 is fixed on the outer side of the precast concrete supporting wall 1 through countersunk screws 7, and grooves are formed in the positions, used for installing countersunk screws 5, on the protection steel plate 1-2 so that the countersunk screws 7 are flush with the surface of the protection steel plate 1-2 after being screwed into the inner wire sleeves 1-4 of the precast concrete supporting wall 1. Through designing the protection steel plate 1-2 into detachable structural mode, can be convenient for change the serious steel strand wires in top wearing and tearing because of repeated anchor into new steel strand wires, the change mode is as follows: the protection steel plate 1-2 is firstly disassembled, then the first steel strand clamp 3-2 is disassembled to fix one end of a new steel strand with the lower end of an original steel strand, then the old steel strand is pulled out from the upper end of the precast concrete supporting wall 1 and simultaneously pulls the new steel strand into position, the new steel strand is cut off after being in position, the bottom end of the new steel strand is anchored by adopting the first steel strand clamp 3-2, and finally the protection steel plate 1-2 is fixed on the precast concrete supporting wall 1 by using the countersunk head screw 7, so that replacement is completed.
When the precast concrete supporting wall 1 is hammered into the soil, the protective steel plate 1-2 is mainly extruded, rubbed and stressed by the countersunk screws 7 against shearing, and stiffening ribs or filled concrete can be arranged in the protective steel plate 1-2 to prevent the precast concrete supporting wall 1 from being damaged.
The protection steel plate 1-2 can be divided into two parts, wherein the detachable part is only arranged at the position on the precast concrete supporting wall 1 corresponding to the first steel strand clamp 3-2, the non-detachable part is positioned at other positions at the bottom of the precast concrete supporting wall 1, and a tongue-and-groove is arranged at the joint of the detachable part and the non-detachable part so that the surfaces of the detachable part and the non-detachable part are flush.
Further, in the above embodiments 1 and 4, as shown in fig. 13, the upper end surface of the precast concrete segment wall 1 may be provided with a preformed hole coaxial with and communicating with the hollow tube 1-1, the preformed hole having a diameter larger than that of the hollow tube 1-1.
In embodiment 1, in order to prevent the first steel strand 2 from shrinking into the hollow tube 1-1 when the precast concrete segment wall 1 is in use, a tip 8 may be disposed at the top end of the first steel strand 2, the tip 8 may be placed in a preformed hole, and when the precast concrete segment wall 1 is pulled out by using the first steel strand 2, the tip 8 may be detached from the steel strand 2 and the steel strand 2 may be fixed on the second steel strand clamp 4-1 after the steel strand 2 is pulled out by the tip 8. As shown in fig. 14, the end 8 may be composed of a sleeve 8-1 and a nut 8-2, where the inner diameter of the sleeve 8-1 gradually decreases from bottom to top. When the end head 8 is used, the first steel strand 2 passes through the inner diameter of the sleeve 8-1, then the nut 8-2 is screwed up, and the first steel strand 2 can be clamped out by the upper part of the sleeve 8-1. Furthermore, threads or grooves may be provided on the upper inner side of the sleeve 8-1 to further grip the first steel strand 2.
In embodiment 4, the lower end of the sleeve 4-1 '"can extend into the preformed hole to be in threaded connection with the steel hanger rod 2'", and the upper end of the sleeve 4-1 '"extends out of the preformed hole to be in threaded connection with the hanging ring 4-2'" so that the hanging ring 4-2 '"is positioned above the precast concrete supporting wall 1, thereby facilitating the connection of the hanging ring 4-2'" with a crane or a travelling crane.
In the present invention, the first steel strand clamp 4-1, the second steel strand clamp 4-2 "and the third steel strand clamp 3-2 may be dedicated clamps for fixing steel strands in the prior art, and the lifting beam 4-2 may be designed according to actual needs.
In the process of pulling out the precast concrete support wall 1, as the upper ends of the first steel stranded wires 2, the second steel stranded wires 2 'and the steel hanging rods 2' "can swing back and forth, in order to prevent the precast concrete support wall 1 from being locally damaged due to repeated scraping and touching of the concrete by the first steel stranded wires 2, the second steel stranded wires 2 'and the steel hanging rods 2'", the hollow pipe 1-1 pre-buried at the upper part of the precast concrete support wall 1 is preferably a steel pipe, and the hollow pipe 1-1 pre-buried at other positions of the precast concrete support wall 1 can be a plastic pipe such as PVC. In addition, the surfaces of the steel strands 2 may be coated with a lubricant to reduce friction between the first steel strands 2, the second steel strands 2 'and the steel hanger rods 2' "and the hollow tube 1-1.
The foregoing is a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention and are intended to be comprehended within the scope of the present invention.
Claims (11)
1. The pulling-out device for the precast concrete support wall is characterized in that a vertical hollow tube is embedded in the precast concrete support wall, the pulling-out device comprises a pulling-out mechanism penetrating through the hollow tube, the lower end of the pulling-out mechanism is fixedly arranged inside the precast concrete support wall and positioned at the lower end of the hollow tube, the upper end of the pulling-out mechanism is freely placed in the hollow tube and extends to the upper part of the precast concrete support wall, a first fixing device for tensioning the pulling-out mechanism is arranged at the upper end of the pulling-out mechanism, and the first fixing device is not connected with the precast concrete support wall;
the pulling mechanism is a first steel strand, the first fixing device comprises a lifting beam, a first steel strand clamp and a first anchor pad arranged between the upper end face of the lifting beam and the first steel strand clamp, the upper end of the first steel strand passes through the lifting beam and is fixed at the upper end of the lifting beam through the first steel strand clamp, and the lifting beam is contacted with the upper end face of the precast concrete support wall under the action of the first steel strand;
the lower extreme of lifting beam is provided with first U type guard plate, precast concrete support wall card is established the U type inslot of first U type guard plate, be provided with on the first U type guard plate and be used for passing the through-hole of first steel strand wires.
2. The extracting device for the precast concrete supporting wall according to claim 1, wherein the side surface of the U-shaped groove of the first U-shaped protection plate is an arc surface, the center of the arc surface is located at the outer side of the first U-shaped protection plate, and stiffening ribs are arranged at the outer side of the first U-shaped protection plate.
3. The pulling-out device for the precast concrete supporting wall according to claim 2, wherein a second fixing device for fixing the first steel strand is embedded in the precast concrete supporting wall at the lower end of the hollow tube, the second fixing device comprises a second anchor backing plate at the lower end of the hollow tube, and a third steel strand clamp is arranged below the second anchor backing plate.
4. The extracting device for the precast concrete supporting wall according to claim 3, wherein the bottom end of the precast concrete supporting wall is provided with a protective steel plate, and the second fixing device is welded with the protective steel plate.
5. The extracting device for a precast concrete supporting wall according to claim 4, wherein the protection steel plate is detachably connected to a bottom end of the precast concrete supporting wall, a stiffening rib extending to an inside of the precast concrete supporting wall is provided at an inside of the protection steel plate, or concrete extending to the inside of the precast concrete supporting wall is poured at an inside of the protection steel plate.
6. The extracting device for a precast concrete supporting wall according to claim 5, wherein the upper end surface of the precast concrete supporting wall is provided with a preformed hole which is coaxial with and communicated with the hollow tube, and the diameter of the preformed hole is larger than that of the hollow tube.
7. The pulling-out device for the precast concrete support wall is characterized in that a vertical hollow tube is embedded in the precast concrete support wall, the pulling-out device comprises a pulling-out mechanism penetrating through the hollow tube, the lower end of the pulling-out mechanism is fixedly arranged inside the precast concrete support wall and positioned at the lower end of the hollow tube, the upper end of the pulling-out mechanism is freely placed in the hollow tube and extends to the upper part of the precast concrete support wall, a first fixing device for tensioning the pulling-out mechanism is arranged at the upper end of the pulling-out mechanism, and the first fixing device is not connected with the precast concrete support wall;
the pulling mechanism is a second steel strand, a groove is formed in the upper end of the precast concrete supporting wall, a second U-shaped protection plate is arranged in the groove, the first fixing device comprises rectangular steel and a second steel strand clamp, the rectangular steel and the second steel strand clamp are arranged on the upper end face of the second U-shaped protection plate and located in the groove, a lifting hole is formed in the side wall of the rectangular steel, the second steel strand clamp is arranged in the rectangular steel, the upper end of the second steel strand penetrates through the second U-shaped protection plate and the rectangular steel and is fixed on the rectangular steel through the second steel strand clamp, and the rectangular steel is in contact with the end face of the groove under the action of the second steel strand.
8. The extracting device for the precast concrete supporting wall according to claim 7, wherein a second fixing device for fixing the second steel strand is embedded in the precast concrete supporting wall at the lower end of the hollow pipe, the second fixing device comprises a second anchor backing plate at the lower end of the hollow pipe, and a third steel strand clamp is arranged below the second anchor backing plate.
9. The extracting device for the precast concrete supporting wall according to claim 8, wherein the bottom end of the precast concrete supporting wall is provided with a protective steel plate, and the second fixing device is welded with the protective steel plate.
10. The extracting device for the precast concrete segment wall according to claim 9, wherein the protection steel plate is detachably connected to the bottom end of the precast concrete segment wall, the inside of the protection steel plate is provided with a stiffening rib extending to the inside of the precast concrete segment wall, or the inside of the protection steel plate is poured with concrete extending to the inside of the precast concrete segment wall.
11. The extracting device for a precast concrete supporting wall according to claim 10, wherein the upper end surface of the precast concrete supporting wall is provided with a preformed hole which is coaxial with and communicated with the hollow tube, and the diameter of the preformed hole is larger than that of the hollow tube.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113427.0A CN108086319B (en) | 2018-02-05 | 2018-02-05 | Pulling-out device for precast concrete supporting wall |
| PCT/CN2018/092744 WO2019148751A1 (en) | 2018-02-05 | 2018-06-26 | Pulling-out device for precast concrete support wall |
| US16/489,615 US10900191B2 (en) | 2018-02-05 | 2018-06-26 | Pulling-out device for prefabricated concrete support wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113427.0A CN108086319B (en) | 2018-02-05 | 2018-02-05 | Pulling-out device for precast concrete supporting wall |
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| Publication Number | Publication Date |
|---|---|
| CN108086319A CN108086319A (en) | 2018-05-29 |
| CN108086319B true CN108086319B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810113427.0A Active CN108086319B (en) | 2018-02-05 | 2018-02-05 | Pulling-out device for precast concrete supporting wall |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019148751A1 (en) * | 2018-02-05 | 2019-08-08 | 山东大学 | Pulling-out device for precast concrete support wall |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167761A (en) * | 2000-11-30 | 2002-06-11 | Takeshi Shinohara | Extracting method of buried concrete pile and extracting hooking tool |
| CN205312861U (en) * | 2015-11-18 | 2016-06-15 | 中国一冶集团有限公司 | Handling and draw prefabricated hollow for concrete pipe pile auxiliary device |
| CN208533528U (en) * | 2018-02-05 | 2019-02-22 | 山东大学 | Extracting apparatus for precast concrete braced wall |
-
2018
- 2018-02-05 CN CN201810113427.0A patent/CN108086319B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167761A (en) * | 2000-11-30 | 2002-06-11 | Takeshi Shinohara | Extracting method of buried concrete pile and extracting hooking tool |
| CN205312861U (en) * | 2015-11-18 | 2016-06-15 | 中国一冶集团有限公司 | Handling and draw prefabricated hollow for concrete pipe pile auxiliary device |
| CN208533528U (en) * | 2018-02-05 | 2019-02-22 | 山东大学 | Extracting apparatus for precast concrete braced wall |
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| CN108086319A (en) | 2018-05-29 |
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