CN113737794B - Fast cut-off device for pile head of cast-in-situ bored pile and use method thereof - Google Patents
Fast cut-off device for pile head of cast-in-situ bored pile and use method thereof Download PDFInfo
- Publication number
- CN113737794B CN113737794B CN202111006888.6A CN202111006888A CN113737794B CN 113737794 B CN113737794 B CN 113737794B CN 202111006888 A CN202111006888 A CN 202111006888A CN 113737794 B CN113737794 B CN 113737794B
- Authority
- CN
- China
- Prior art keywords
- cut
- pile head
- piece
- pieces
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
Landscapes
- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a fast cut-off device for a pile head of a bored pile, which comprises a cut-off device and a plugging device, wherein the cut-off device comprises a structure frame, the inner wall of the structure frame is circumferentially provided with a plurality of turnable cut-off pieces, each cut-off piece is closed to enable the center of the structure frame to form a guide pipe avoidance hole, the plugging device plugs the guide pipe avoidance hole, one end of each cut-off piece is provided with a rotating shaft, the rotating shaft is rotatably connected with the inner wall of the structure frame, one end of each guide piece is connected with the rotating shaft, the cut-off pieces are vertically arranged with the guide pieces, the area of each guide piece is smaller than that of each cut-off piece, the cut-off device and the plugging device are matched for use, so that the bored pile is separated into two parts before concrete is solidified, the work load of cut-off after solidification is greatly reduced, the cut-off pieces and the guide pieces are arranged at 90 degrees, the cut-off pieces sag under the action of gravity before the concrete is poured in place, a grouting channel is in an open state, and the cut-off pieces are automatically under the assistance of the guide pieces when the concrete is poured in place, and no additional execution mechanism is needed.
Description
Technical Field
The invention relates to the field of cast-in-situ bored pile construction, in particular to a rapid cut-off device for a pile head of a cast-in-situ bored pile and a using method thereof.
Background
The cast-in-situ bored pile is a pile formed by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation on an engineering site, placing a reinforcement cage and pouring concrete in the pile hole, and can be classified into a immersed tube cast-in-situ pile, a cast-in-situ bored pile and the like according to different hole forming methods. In each industry engineering construction, the bored concrete pile is the most common pile foundation structure always, and the pile head of bored concrete pile handles traditional method and adopts the manual work to chisel out the concrete part, exposes the reinforcing bar and uses with the process of going after, and this kind of mode is wasted time and energy, and the special chisel that rises in recent years plays also promotes gradually, nevertheless because equipment is comparatively professional, and the popularization range receives the restriction.
In the prior art, the content recorded in the construction method of the ecological pile cutting system of the cast-in-situ bored pile is CN 108589728B, the pile head is transversely cut by adopting a cutting piece mechanical type, the mechanism is complex, the main reinforcement of a reinforcement cage is avoided when the pile head is cut, and the implementation difficulty is high.
Disclosure of Invention
The invention provides a rapid cutting device for a bored pile head and a using method thereof, which solve the problem of rapid cutting of the bored pile head.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a fast cut-off device for a pile head of a bored pile comprises a cut-off device and a plugging device, wherein the cut-off device comprises a structural frame, a plurality of turnable cut-off pieces are arranged on the inner wall of the structural frame along the circumferential direction, each cut-off piece is closed to enable the center of the structural frame to form a guide pipe avoiding hole, and the plugging device plugs the guide pipe avoiding hole.
In the preferred scheme, section one end is equipped with the pivot, and the pivot is rotated with the structure frame inner wall and is connected, still is equipped with the guide piece, and guide piece one end is connected with the pivot, and the section is arranged with the guide piece is perpendicular, and the guide piece area is less than the section area.
In the preferred scheme, the inner wall of the structure frame is circumferentially provided with a plurality of sleeves, and the sleeves are used for being sleeved with the reinforcing steel bars.
In the preferred scheme, the plugging device includes well cavity pole, and well cavity pole outer wall slides and has cup jointed the slip handle, and well cavity pole lower extreme is equipped with first articulated seat, and the slip handle lower extreme is equipped with the articulated seat of second, and first articulated seat outer fringe is equipped with a plurality of rotatable second skeleton poles, and the articulated seat outer fringe of second is equipped with a plurality of rotatable first skeleton poles, and each first skeleton pole is articulated with each second skeleton pole, and first skeleton pole and the outside parcel of second skeleton pole have the outer cover, and hole is dodged to outer cover shutoff pipe.
In the preferred scheme, the upper end of the hollow rod is provided with a liquid injection port, the lower end of the hollow rod is provided with a plurality of spray holes along the circumferential direction, and the spray holes are formed in the outer side of the outer cover.
In the preferred scheme, be equipped with the space ring between first articulated seat and the articulated seat of second, the space ring cup joints with the cavity pole, and the space ring is equipped with a plurality of air vents, and the slip handle inner wall is equipped with a plurality of air channels, and outer front cover inboard space passes through air vent and air channel and outside intercommunication.
In the preferred scheme, first articulated seat and the articulated seat one side of second are equipped with the fixed cover of front cover, and the fixed cover of front cover is used for compressing tightly outer front cover.
In the preferred scheme, a blocking rod is further sleeved in the hollow rod, a plug is arranged at the lower end of the blocking rod, and the plug blocks the spray hole.
In the preferred scheme, the inner wall of the structural frame is provided with a magnetic block which stops and attracts the guide piece.
Comprises a use method of the composition, and the composition,
s1, installing a cutter on a reinforcement cage, and inserting a guide pipe;
s2, pouring concrete into the hole body from the guide pipe to an elevation, and closing the cut-off pieces;
s3, inserting and expanding the occluder through the catheter avoidance hole;
s4, lifting the plugging device to enable the outer cover to plug the conduit avoidance hole;
s5, waiting for the concrete of the pile head to solidify;
s6, injecting high-pressure liquid from an upper end liquid injection port of the hollow rod, and spraying the high-pressure liquid from a spray hole to separate pile head concrete;
and S7, hanging the pile head out and recovering the cutter and the plugging device.
The invention has the beneficial effects that: the cut-off device and the plugging device are used in a matched mode, so that the bored pile concrete is separated into two parts before solidification, and the cut-off workload after solidification is greatly reduced; the grouting channel is in an open state, and when the concrete is poured in place, the cut-off pieces are automatically closed under the assistance of the guide pieces without an additional execution mechanism; after the concrete is poured in place, the plugging device is opened to timely seal the conduit hole, and the plugging device is matched with the cutoff piece to realize separation before concrete solidification, so that the difficulty of removing the solidified pile head is greatly reduced; the plugging device adopts a hollow shaft, and high-pressure liquid can be injected into the hollow shaft, so that the residual connection point of the pile head is burst, and the traditional mechanical operations such as beating, shearing and the like are not needed; the inside skeleton pole is lived to outer front cover parcel, prevents that the concrete from invading to destroy hinge structure.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic plan view of the present invention.
FIG. 2 is a plan view of the first state of the interceptor of the present invention.
FIG. 3 is a schematic plan view of the chopper of the present invention in state two.
Figure 4 is a schematic front view of the truncator of the present invention.
Fig. 5 is a schematic view of the present invention showing the connection of the cutoff piece and the guide piece.
Figure 6 is a schematic view of the occluding device of the present invention in a contracted state.
Figure 7 is a schematic view of the occluding device of the present invention in an expanded state.
Figure 8 is a schematic plan view of the occluding device of the present invention.
Fig. 9 is a view showing the structure of the occluder in an expanded state according to the present invention.
Figure 10 is a view of the occluding device of the present invention in a contracted state.
Fig. 11 is an enlarged view of the present invention at the first hinge seat.
Fig. 12 is a schematic view of the injection port at the upper end of the sliding stem of the present invention.
Figure 13 is a broken cross-sectional view of the occluding device of the present invention.
FIG. 14 is a first construction drawing of the present invention.
FIG. 15 is a second construction drawing of the present invention.
FIG. 16 is a third construction drawing of the present invention.
FIG. 17 is a fourth construction drawing of the present invention.
In the figure: a cutter 1; a structural frame 101; a cut-off piece 102; a sleeve 103; a guide piece 104; a rotating shaft 105; a catheter clearance hole 106; a magnetic block 107; an occluder 2; an outer cover 201; a hollow shaft 202; a slide handle 203; a first skeletal rod 204; a first hinge base 205; a second hinged seat 206; a cover fixing sleeve 207; a nozzle 208; a space ring 209; a vent hole 210; a vent groove 211; a blocking rod 212; a plug 213; a second skeletal rod 214; a conduit 3; a hole body 4; and (5) reinforcing steel bars.
Detailed Description
As shown in fig. 1-17, a fast cut-off device for a pile head of a bored pile comprises a cut-off device 1 and a plugging device 2, wherein the cut-off device 1 comprises a structure frame 101, a plurality of reversible cut-off pieces 102 are arranged on the inner wall of the structure frame 101 along the circumferential direction, each cut-off piece 102 is closed to enable the center of the structure frame 101 to form a guide pipe avoiding hole 106, and the plugging device 2 plugs the guide pipe avoiding hole 106.
When the concrete is poured in place, the guide pipe 3 is taken out, the plugging device 2 is inserted from the guide pipe avoidance hole 106 and plugged from the lower end of the guide pipe avoidance hole 106, before the concrete is solidified, the pile head part and the cast-in-place pile are already divided into two parts, and the pile head part can be quickly detached by lifting up after the cast-in-place pile and the pile head are solidified.
In a preferable scheme, a rotating shaft 105 is arranged at one end of the section piece 102, the rotating shaft 105 is rotatably connected with the inner wall of the structure frame 101, a guide piece 104 is further arranged, one end of the guide piece 104 is connected with the rotating shaft 105, the section piece 102 is vertically arranged with the guide piece 104, and the area of the guide piece 104 is smaller than that of the section piece 102.
Because of the small area of the guide piece 104, the concrete can pass through and impact the guide piece 104, so that the guide piece 104 rotates the cutoff piece 102 until it is completely closed.
In a preferred scheme, a plurality of sleeves 103 are arranged on the inner wall of the structural frame 101 along the circumferential direction, and each sleeve 103 is used for being sleeved with each steel bar 5 of the steel bar cage, so that the cutter 1 is installed and fixed.
In the preferred scheme, the occluder 2 comprises a hollow rod 202, a sliding handle 203 is sleeved on the outer wall of the hollow rod 202 in a sliding manner, a first hinged seat 205 is arranged at the lower end of the hollow rod 202, a second hinged seat 206 is arranged at the lower end of the sliding handle 203, a plurality of rotatable second skeleton rods 214 are arranged on the outer edge of the first hinged seat 205, a plurality of rotatable first skeleton rods 204 are arranged on the outer edge of the second hinged seat 206, each first skeleton rod 204 is hinged to each second skeleton rod 214, outer covers 201 are wrapped on the outer sides of the first skeleton rod 204 and the second skeleton rods 214, and the outer covers 201 occlude the conduits to avoid the holes 106.
When the occluder 2 is in a contracted state, the maximum cross-sectional area is small, and the occluder is easy to pass through the catheter avoidance hole 106, and when the occluder 2 is in an expanded state, the maximum cross-sectional area is large, and the catheter avoidance hole 106 is covered and occluded.
In a preferred embodiment, the upper end of the hollow rod 202 is provided with a liquid injection port, the lower end of the hollow rod 202 is provided with a plurality of injection holes 208 along the circumferential direction, and the injection holes 208 are arranged outside the outer cover 201.
After the cast-in-place pile and the pile head are solidified, high-pressure liquid is injected into the liquid injection port, the high-pressure liquid is sprayed out through the spray holes 208, the outer cover 201 and other positions of the interface are extruded, so that the residual concrete connection points are broken, and the pile head is more convenient to lift.
In a preferred scheme, a spacer 209 is arranged between the first hinged seat 205 and the second hinged seat 206, the spacer 209 is sleeved with the hollow rod 202, the spacer 209 is provided with a plurality of vent holes 210, the inner wall of the sliding handle 203 is provided with a plurality of vent grooves 211, and the inner space of the outer cover 201 is communicated with the outside through the vent holes 210 and the vent grooves 211.
In the preferred scheme, first articulated seat 205 and second articulated seat 206 one side are equipped with the fixed cover 207 of front cover, and the fixed cover 207 of front cover is used for compressing tightly outer front cover 201, plays the sealed effect of interface, because outer front cover 201 attaches in the outside of first skeleton pole 204 and each second skeleton pole 214, the concrete can not enter into the inner space, prevents that articulated structure from being solidified and destroyed, easily clears up the concrete attached to the surface when shutoff device 2 retrieves.
In a preferable scheme, a blocking rod 212 is further sleeved in the hollow rod 202, a plug 213 is arranged at the lower end of the blocking rod 212, and the plug 213 blocks the jet hole 208, so that concrete is prevented from being solidified and entering the inner cavity of the hollow rod 202.
The upper end of the blocking rod 212 is equivalent to an extension rod, even if the sliding handle 203 is pulled to the uppermost end, the upper end of the blocking rod 212 still protrudes out of the sliding handle 203, so that the holding operation is convenient.
In a preferable scheme, the inner wall of the structure frame 101 is provided with a magnetic block 107, and the magnetic block 107 stops and sucks the guide piece 104.
The construction method comprises the following steps of,
s1, installing a cutter 1 on a reinforcement cage, and inserting a guide pipe 3;
s2, pouring concrete into the hole body 4 from the guide pipe 3 to an elevation, enabling the concrete slurry to impact the guide piece 104 to drive the cut-off piece 102 to be closed, and enabling the guide piece 104 to abut against the magnetic block 107 and be sucked and fixed;
s3, inserting the occluder 2 from the catheter avoidance hole 106, respectively holding the upper end of the occluding rod 212 and the sliding handle 203 with two hands, and unfolding the occluder 2;
s4, lifting the plugging device 2 upwards to enable the outer cover 201 to plug the catheter avoidance hole 106;
s5, waiting for the concrete of the pile head to solidify;
s6, after the pile head concrete is solidified, detaching the blocking rod 212, injecting high-pressure liquid from the liquid injection port at the upper end of the hollow rod 202, and ejecting the high-pressure liquid from the ejection hole 208 to separate the pile head concrete;
s7, hanging the pile head out to expose the steel bar 5, facilitating the use of the post process, removing concrete wrapping the interceptor 1 and the plugging device 2, and recycling the interceptor 1 and the plugging device 2.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (7)
1. The utility model provides a drilling bored concrete pile head cuts device fast which characterized by: the device comprises a cutter (1) and a plugging device (2), wherein the cutter (1) comprises a structure frame (101), a plurality of reversible cutting pieces (102) are arranged on the inner wall of the structure frame (101) along the circumferential direction, each cutting piece (102) is closed to enable the center of the structure frame (101) to form a conduit avoidance hole (106), and the plugging device (2) plugs the conduit avoidance hole (106);
one end of the cutting piece (102) is provided with a rotating shaft (105), the rotating shaft (105) is rotatably connected with the inner wall of the structural frame (101), the cutting piece is also provided with a guide piece (104), one end of the guide piece (104) is connected with the rotating shaft (105), the cutting piece (102) and the guide piece (104) are vertically arranged, and the area of the guide piece (104) is smaller than that of the cutting piece (102);
the inner wall of the structure frame (101) is circumferentially provided with a plurality of sleeves (103), and the sleeves (103) are used for being sleeved with the reinforcing steel bars (5);
the plugging device (2) comprises a hollow rod (202), a sliding handle (203) is sleeved on the outer wall of the hollow rod (202) in a sliding mode, a first hinged seat (205) is arranged at the lower end of the hollow rod (202), a second hinged seat (206) is arranged at the lower end of the sliding handle (203), a plurality of rotatable second skeleton rods (214) are arranged on the outer edge of the first hinged seat (205), a plurality of rotatable first skeleton rods (204) are arranged on the outer edge of the second hinged seat (206), each first skeleton rod (204) is hinged to each second skeleton rod (214), outer cover covers (201) are wrapped on the outer sides of the first skeleton rods (204) and the second skeleton rods (214), and holes (106) are avoided by plugging conduits of the outer cover covers (201).
2. The cast-in-situ bored pile head quick cutting device according to claim 1, wherein: the upper end of the hollow rod (202) is provided with a liquid injection port, the lower end of the hollow rod (202) is provided with a plurality of spray holes (208) along the circumferential direction, and the spray holes (208) are arranged on the outer side of the outer cover (201).
3. The cast-in-situ bored pile head quick cutting device according to claim 1, wherein: be equipped with between first articulated seat (205) and the articulated seat of second (206) spacer ring (209), spacer ring (209) cup joint with cavity pole (202), and spacer ring (209) are equipped with a plurality of air vents (210), and slip handle (203) inner wall is equipped with a plurality of air channels (211), and outer front cover (201) inboard space passes through air vent (210) and air channel (211) and outside intercommunication.
4. The cast-in-situ bored pile head quick cutting device according to claim 1, wherein: a cover fixing sleeve (207) is arranged on one side of the first hinging seat (205) and the second hinging seat (206), and the cover fixing sleeve (207) is used for pressing the outer cover (201).
5. The cast-in-situ bored pile head quick cutting device according to claim 2, wherein: a blocking rod (212) is further sleeved in the hollow rod (202), a plug (213) is arranged at the lower end of the blocking rod (212), and the plug (213) blocks the spray hole (208).
6. The cast-in-situ bored pile head quick cutting device according to claim 1, wherein: the inner wall of the structure frame (101) is provided with a magnetic block (107), and the magnetic block (107) stops and attracts the guide piece (104).
7. The use method of the rapid cutoff device for the pile head of the cast-in-situ bored pile according to claim 2, wherein:
s1, installing a cutter (1) on a reinforcement cage, and inserting a guide pipe (3);
s2, pouring concrete into the hole body (4) from the guide pipe (3) to an elevation, and closing the cut-off pieces (102);
s3, inserting and expanding the occluder (2) through the catheter avoidance hole (106);
s4, lifting the plugging device (2) to enable the outer cover (201) to plug the catheter avoidance hole (106);
s5, waiting for the concrete of the pile head to solidify;
s6, injecting high-pressure liquid from an injection port at the upper end of the hollow rod (202), and spraying the high-pressure liquid from the spray hole (208) to separate pile head concrete;
s7, hanging out the pile head and recovering the cutter (1) and the plugging device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111006888.6A CN113737794B (en) | 2021-08-30 | 2021-08-30 | Fast cut-off device for pile head of cast-in-situ bored pile and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111006888.6A CN113737794B (en) | 2021-08-30 | 2021-08-30 | Fast cut-off device for pile head of cast-in-situ bored pile and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113737794A CN113737794A (en) | 2021-12-03 |
| CN113737794B true CN113737794B (en) | 2023-02-24 |
Family
ID=78734039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111006888.6A Active CN113737794B (en) | 2021-08-30 | 2021-08-30 | Fast cut-off device for pile head of cast-in-situ bored pile and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113737794B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU393402A1 (en) * | 1970-01-16 | 1973-08-10 | витель Ю. В. Дмитревич, Г. Ф. Ларина , Б. Г. Лызо Всесоюзный научно исследовательский институт строительного , дорожного машиностроени | |
| CN104234038A (en) * | 2014-03-03 | 2014-12-24 | 王磊 | Bored concrete pile construction technology without breaking of pile head |
| CN109235436A (en) * | 2018-10-22 | 2019-01-18 | 中国建筑第八工程局有限公司 | The working device of pile crown and its construction method |
| CN109629557A (en) * | 2018-12-18 | 2019-04-16 | 五冶集团上海有限公司 | A kind of cast-in-situ bored pile pile crown isolating device and its application method |
| CN109989394A (en) * | 2019-05-14 | 2019-07-09 | 贵州建工集团有限公司 | A kind of cast-in-place concrete pile section stake partition and its construction method |
| CN211621581U (en) * | 2019-12-06 | 2020-10-02 | 荆州市华升新型材料股份有限公司 | Pile head breaking device for concrete cast-in-place pile |
| CN212670568U (en) * | 2020-07-16 | 2021-03-09 | 中铁二局集团有限公司 | Pile head breaking device used before initial setting of concrete |
-
2021
- 2021-08-30 CN CN202111006888.6A patent/CN113737794B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU393402A1 (en) * | 1970-01-16 | 1973-08-10 | витель Ю. В. Дмитревич, Г. Ф. Ларина , Б. Г. Лызо Всесоюзный научно исследовательский институт строительного , дорожного машиностроени | |
| CN104234038A (en) * | 2014-03-03 | 2014-12-24 | 王磊 | Bored concrete pile construction technology without breaking of pile head |
| CN109235436A (en) * | 2018-10-22 | 2019-01-18 | 中国建筑第八工程局有限公司 | The working device of pile crown and its construction method |
| CN109629557A (en) * | 2018-12-18 | 2019-04-16 | 五冶集团上海有限公司 | A kind of cast-in-situ bored pile pile crown isolating device and its application method |
| CN109989394A (en) * | 2019-05-14 | 2019-07-09 | 贵州建工集团有限公司 | A kind of cast-in-place concrete pile section stake partition and its construction method |
| CN211621581U (en) * | 2019-12-06 | 2020-10-02 | 荆州市华升新型材料股份有限公司 | Pile head breaking device for concrete cast-in-place pile |
| CN212670568U (en) * | 2020-07-16 | 2021-03-09 | 中铁二局集团有限公司 | Pile head breaking device used before initial setting of concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113737794A (en) | 2021-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104863142A (en) | Pentagonal prism composite soil pile machine | |
| ITTO20100507A1 (en) | DEVICE AND METHOD OF PERFORATION IN CONSTITUTION OF SOIL. | |
| CN104727306A (en) | Cast-in place pile pouring and pile head cutting-off method | |
| CN102605771B (en) | Construction method for drilling cast-in-place concrete pipe pile and drilling tool for concrete pipe pile | |
| JP5762238B2 (en) | Structure and removal method of steel pipe pile | |
| CN113737794B (en) | Fast cut-off device for pile head of cast-in-situ bored pile and use method thereof | |
| CN111364464A (en) | Construction equipment for pouring concrete into karst cave and construction method thereof | |
| JPH04289319A (en) | Method and apparatus for forming soil cement composite pile | |
| JP4582477B2 (en) | Ground improvement device provided with expanded wing excavation wing and method for constructing cored reinforcement | |
| CN202659195U (en) | Incision-salvage device for drill pipes and casing pipes | |
| CN113846671B (en) | Up-down separately digging type construction method for underground passage crossing under upper building pile foundation | |
| CN212405143U (en) | Pile cutting device | |
| CN215482945U (en) | Pile head separating device for bored pile | |
| CN113818502B (en) | Underpinning method for pile foundation with lower end located in underground passage | |
| JP5339966B2 (en) | tube | |
| JPS6119774B2 (en) | ||
| CN112012210B (en) | Pile head breaking device of bridge pile foundation | |
| CN102619219A (en) | Drilling construction method for cast-in-place concrete variable threaded tubular pile and drilling tool for implementing drilling construction method | |
| CN209585019U (en) | A kind of cast-in-situ bored pile pile crown reinforcing bar protective device | |
| CN210086498U (en) | Fill wall lacing bar built-in fitting in shear force wall | |
| CN106498938B (en) | A kind of application method of cast-in-place concrete pile head shaping equipment | |
| CN201521247U (en) | Grouting drill bit with check valve | |
| CN212477731U (en) | Construction equipment for pouring concrete into karst cave | |
| JPH0464696A (en) | Tunnel lining method and form device therefor | |
| CN109371960A (en) | A kind of SRP engineering method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |