CN211036992U - Bored concrete pile concrete pouring device - Google Patents
Bored concrete pile concrete pouring device Download PDFInfo
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- CN211036992U CN211036992U CN201921313383.2U CN201921313383U CN211036992U CN 211036992 U CN211036992 U CN 211036992U CN 201921313383 U CN201921313383 U CN 201921313383U CN 211036992 U CN211036992 U CN 211036992U
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- 239000002689 soil Substances 0.000 claims abstract description 35
- 230000002787 reinforcement Effects 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 230000010412 perfusion Effects 0.000 claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 16
- 239000004566 building material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 11
- 238000005553 drilling Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000001802 infusion Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Abstract
The utility model provides a bored concrete pile concrete pouring device, wherein a pouring platform plate is arranged on the upper surface of a working platform; a lifting position control body and a vibrating rod position control plate are sequentially arranged on the upper surface of the casting platform plate from bottom to top; a vibrating rod connecting pipe of the concrete vibrating rod sequentially penetrates through a connecting pipe guide pipe and a flexible hoop from bottom to top; the lifting of the concrete vibrating rod is controlled by the lifting control body; when a poor stratum exists in a foundation soil layer, arranging a perfusion control sleeve outside a pile body reinforcement cage at the poor stratum part, and arranging an arc plate position control spring between a rigid arc plate of the perfusion control sleeve and a longitudinal reinforcement; when the pile body reinforcement cage is sunk and positioned, the arc plate position control spring is in a pressed state through the arc plate pull rope. The utility model discloses can effectively promote the bearing capacity of platform support mound, can avoid the not enough problem of the vertical degree of steel reinforcement cage and pile body, can also save building material, reduce the degree of difficulty of concrete vibration construction.
Description
Technical Field
The utility model relates to a foundation engineering field, in particular to can improve quality and the efficiency that pile body concrete poured into, reduce bad ground to the drilling bored concrete pile concrete filling device of filling construction influence, be applicable to drilling bored concrete pile construction engineering.
Background
The cast-in-situ bored pile has the characteristics of convenience and quickness in construction, high bearing capacity and the like, and is always the most common pile foundation form applied to projects such as bridges, house buildings and the like. During the concrete pouring construction of the bored pile, it is often the key and difficult point of engineering control how to effectively improve the bearing capacity of the platform support pier, improve the quality control quality of concrete pouring filling, reduce the difficulty of concrete vibration construction and the like.
The prior art has provided a bored pile concrete filling device, by the machine jar frame, hoist engine, roller, guided way, spacing guide way, fortune hopper, overhead traveling crane pulley, cross the hopper, pipe are constituteed, have the spacing feeding of guided way, finish before the concrete setting stage, have 5 meters pipe reverse insertion stroke, can ensure that the concrete is closely knit. Although the device can satisfy concrete filling and the construction requirement of vibrating, the field operation is complicated, the concrete compactness of vibrating is difficult to control, and fails to solve the influence problem of bad soil layer to pile body concrete filling coefficient.
In view of this, in order to improve the concrete pouring quality in the cast-in-situ bored pile construction process, the present invention provides a cast-in-situ bored pile concrete pouring device capable of improving the bearing capacity of a platform support pier, reducing the difficulty of concrete vibration construction, and effectively controlling the concrete pouring filling quality.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a not only can promote the bearing capacity of platform support mound, can reduce the degree of difficulty of concrete vibration construction moreover, can also carry out the drilling bored concrete pile concrete filling device of effective control to the sufficient quality of concrete filling.
In order to realize above arbitrary utility model purpose, the utility model provides a bored concrete pile concrete filling device sets up on the ground soil body, include: the pile side pile casing is arranged in foundation soil, and platform support piers and supporting plate anchor bars are arranged on the foundation soil at intervals relative to two sides of the pile side pile casing, wherein the top end of each platform support pier is provided with a working platform plate, connecting pipe guide pipes are arranged on each casting platform plate at uniform intervals along the circumferential direction, a lifting control body and a vibrating rod control plate are sequentially arranged on the upper surface of each casting platform plate from bottom to top, and a vibrating rod connecting pipe of a concrete vibrating rod sequentially penetrates through the connecting pipe guide pipes and the vibrating rod control plate from bottom to top; a pile body reinforcement cage is arranged in the pile side pile casing, and the pile body reinforcement cage consists of longitudinal reinforcements and circumferential stirrups; when a bad soil layer exists in a foundation soil body, a filling control sleeve is arranged on the outer side of a pile body reinforcement cage at the bad soil layer position and is connected with a longitudinal reinforcement, wherein the filling control sleeve is formed by arranging rigid arc plates and flexible arc plates at intervals, an arc plate position control spring is arranged between the rigid arc plates of the filling control sleeve and the longitudinal reinforcement, one end of an arc plate stay cord is connected with the rigid arc plates of the filling control sleeve, the other end of the arc plate stay cord penetrates through a stay cord guide tube on the arc plate stay cord and then is connected with external rolling and pulling equipment,
in some embodiments, a guide tube reinforcement is disposed between the longitudinal reinforcement and the pull cord guide tube.
In some embodiments, the perfusion control sleeve forms a structure with a circular cross-section, and the number of rigid and flexible arc plates is the same.
In some embodiments, the rigid arc plate and the flexible arc plate are connected by adhesion or bolts; the rigid arc plate is formed by rolling a steel plate, and the flexible arc plate is a rubber plate.
In some embodiments, the arc plate pull cord intersects the infusion control sleeve at a location centered on the center of the infusion control sleeve.
In some embodiments, a flexible hoop is arranged at a corresponding position on the vibrating rod position control plate, the vibrating rod connecting pipe penetrates through the flexible hoop, and the vibrating rod connecting pipe is firmly connected with the flexible hoop through a hoop fastening rib.
In some embodiments, the flexible ferrule is made of rubber material and is adhesively connected with the vibrating rod position control plate.
In some embodiments, 3-6 connecting pipe guide pipes are arranged on the pouring platform plate at uniform intervals along the circumferential direction, and the pouring platform plate is vertically welded with the connecting pipe guide pipes.
In some embodiments, the upper end of the anchor bar of the supporting plate is provided with a diagonal bracing supporting plate connected with the foundation soil body, and a pier-side diagonal bracing is arranged between the platform supporting pier and the diagonal bracing supporting plate.
In some embodiments, the platform support pier is positioned adjacent to the pile side casing, the gusset anchor is positioned outside the platform support pier, and the platform support pier is higher than the pile side casing.
Compared with the prior art, the utility model has the following characteristics and beneficial effect:
1. the utility model discloses set up mound side bracing and bracing backup pad between platform support mound and the ground soil body, can effectively promote the bearing capacity that the platform supported the mound.
2. The utility model discloses set up the filling control sleeve pipe of constituteing by rigidity arc board and flexible arc board at bad soil layer position to accessible arc board accuse position spring and arc board stay cord control filling control sleeve pipe's bullet expand the condition, not only can carry out effective control to the sufficient quality of concrete pouring, can avoid the not enough problem of the vertical degree of steel reinforcement cage and pile body moreover, can also save building material.
3. The utility model discloses set up 3 ~ 6 connecting pipe stand pipes along the hoop even interval on pouring the landing slab to the lift of accessible lift accuse body control concrete vibrating rod has reduced the degree of difficulty of concrete vibrating construction.
Drawings
Fig. 1 is a schematic view of a bored concrete pile concrete pouring device according to an embodiment of the present invention.
Fig. 2 is a schematic view illustrating a structure of the perfusion control sleeve of fig. 1 coupled with longitudinal bars.
In the figure: 1-a foundation soil body; 2-platform support piers; 3-supporting plate anchor bars; 4-a working platform plate; 5-bracing a support plate; 6-pier side inclined strut; 7-pile side pile casing; 8-hoop reinforcement; 9-longitudinal steel bars; 10-pouring a platform plate; 11-connecting the pipe guide; 12-lifting control body; 13-a vibrating rod position control plate; 14-a concrete vibrating rod; 15-vibrating rod connecting pipe; 16-a flexible cuff; 17-a ferrule fastening rib; 18-pile body concrete; 19-perfusion control cannula; 20-rigid arc plates; 21-arc plate position control spring; 22-arc plate pull rope; 23-a pull rope guide tube; 24-a flexible arc plate; 25-guide tube reinforcing ribs; 26-pile body reinforcement cage; 27-poor soil layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Concrete mix proportion design and pouring construction technical requirement, on-the-spot hoist and mount construction technical requirement, the rolling of shaped steel and welding construction technical requirement, bolt-up construction technical requirement etc. no longer give unnecessary details in this embodiment, the key explanation the utility model relates to an embodiment of device.
Fig. 1 is the concrete pouring device of the bored concrete pile of the present invention, and fig. 2 is the pouring control sleeve and the longitudinal reinforcement bar connecting structure of fig. 1.
Referring to fig. 1-2, the bored concrete pile concrete pouring device is arranged on a foundation soil body (1), a pile side pile casing (7) is arranged in the foundation soil body (1), platform support piers (2) and supporting plate anchor bars (3) are arranged on the foundation soil body (1) at intervals relative to two sides of the pile side pile casing (7), wherein the platform support piers (2) are arranged close to the pile side pile casing (7), the supporting plate anchor bars (3) are arranged on the outer sides of the platform support piers (2), and the platform support piers (2) are higher than the pile side pile casing (7); the top of platform buttress (2) sets up work platform board (4), and fagging anchor bar (3) upper end sets up bracing backup pad (5) that meet with the ground soil body (1), and wherein fagging anchor bar (3) perpendicular to ground soil body (1) set up, and bracing backup pad (5) are on a parallel with the ground soil body (1), sets up mound side bracing (6) between platform buttress (2) and bracing backup pad (5).
Checking the spatial position of a pile side pile casing (7), arranging a pouring platform plate (10) on the upper surface of a working platform plate (4), and arranging 3-6 connecting pipe guide pipes (11) on the pouring platform plate (10) along the circumferential direction at even intervals, wherein the connecting pipe guide pipes (11) are perpendicular to the pouring platform plate (10). The upper surface of the casting platform plate (10) is sequentially provided with a lifting control body (12) and a vibrating rod control plate (13) from bottom to top, wherein the height of the lifting control body (12) is adjustable.
The vibrating rod connecting pipe (15) of the concrete vibrating rod (14) sequentially penetrates through the connecting pipe guide pipe (11) and the vibrating rod position control plate (13) from bottom to top, a flexible hoop (16) is arranged at a corresponding position on the vibrating rod position control plate (13), the vibrating rod connecting pipe (15) penetrates through the flexible hoop (16), and the vibrating rod connecting pipe (15) is firmly connected with the flexible hoop (16) through a hoop fastening rib (17).
At the moment, the construction of pile body concrete (18) is synchronously carried out by adopting the concrete vibrating rod (14) on the casting platform plate (10), and the lifting of the concrete vibrating rod (14) is controlled by the lifting control body (12).
Be provided with pile body steel reinforcement cage (26) in stake side pile casing (7), pile body steel reinforcement cage (26) comprises longitudinal reinforcement (9) and hoop reinforcement (8), when there is bad soil layer (27) in ground soil body (1), sets up in pile body steel reinforcement cage (26) outside at bad soil layer (27) position and fills control sleeve pipe (19), fills control sleeve pipe (19) and connects longitudinal reinforcement (9), wherein fills control sleeve pipe (19) and adopts rigidity arc board (20) and flexible arc board (24) interval that quantity equals to lay and form, forms a cross section and is circular shape structure.
As shown in fig. 2, an arc plate position control spring (21) is arranged between a rigid arc plate (20) of the perfusion control sleeve (19) and the longitudinal steel bar (9), one end of an arc plate pull rope (22) is connected with the rigid arc plate (20) of the perfusion control sleeve (19), the other end of the arc plate pull rope passes through a pull rope guide tube (23) on the arc plate pull rope (22) and then is connected with external coiling and pulling equipment, and the arc plate pull rope (22) is intersected at the circle center position of the perfusion control sleeve (19).
When the pile body reinforcement cage (26) is sunk and positioned, the arc plate position control spring (21) is in a pressed state through the arc plate pull rope (22); when the pile body concrete (18) is poured, the pulling force of the arc plate pulling rope (22) on the rigid arc plate (20) is removed, so that the pouring control sleeve (19) is outwards expanded under the action of the arc plate position control spring (21) to form a side wall enclosure of the pile body concrete (18).
In some embodiments, a guide tube reinforcement (25) is provided between the longitudinal reinforcement (9) and the pull cord guide tube (23).
The flexible hoop (16) is made of rubber materials and is connected with the vibrating rod position control plate (13) in a sticking mode.
The hoop fastening rib (17) adopts a hose hoop; the poor soil layer comprises a soft soil interlayer or a fracture zone or a loose sand layer.
The rigid arc plate (20) is connected with the flexible arc plate (24) through adhesion or bolts; the rigid arc plate (20) is formed by rolling a steel plate, and the flexible arc plate (24) is a rubber plate.
The foundation soil body (1) is a strongly weathered argillaceous siltstone; a bad soil layer (27) with the thickness of 2m exists in the foundation soil body (1), and the bad soil layer (27) is a clay interlayer.
The platform support pier (2) is made of a steel pipe material with the diameter of 120mm and the wall thickness of 2 mm.
The supporting plate anchor bars (3) are formed by rolling deformed steel bars with the diameter of 32 mm.
The working platform plate (4) is made of a steel plate with the thickness of 10 mm.
The inclined strut supporting plate (5) is formed by rolling a steel plate with the thickness of 10 mm.
The pier side inclined strut (6) is made of a steel pipe with the diameter of 60mm and is connected with the platform support pier (2) and the inclined strut support plate (6) in a welding mode.
The pile side pile casing (7) is formed by rolling a steel plate with the diameter of 1m and the thickness of 5 mm.
The pouring platform plate (10) is made of a steel plate with the thickness of 10mm, a connecting pipe guide pipe (11) is preset on the pouring platform plate, and the pouring platform plate (10) is vertically welded with the connecting pipe guide pipe (11).
The guide pipe (11) of the connecting pipe is made of a steel pipe material with the diameter of 10 cm.
The lifting control body (12) adopts a hydraulic jack with the stroke of 50 cm.
The vibrating rod position control plate (13) is made of a steel plate with the thickness of 2 mm.
The diameter of the concrete vibrating rod (14) is 50 mm.
The vibrating rod connecting pipe (15) adopts a rubber pipe matched with the concrete vibrating rod (14).
The flexible hoop (16) is made of rubber tube material with the inner diameter of 6cm and the wall thickness of 1 cm.
The hoop fastening rib (17) adopts a throat hoop with the width of 2 cm.
The strength of the pile body concrete (18) is C35.
The perfusion control sleeve (19) is formed by arranging rigid arc plates (20) and flexible arc plates (24) at intervals, the number of the rigid arc plates (20) is the same as that of the flexible arc plates (24), and the central angles are 60 degrees, so that the rigid arc plates (20) are connected with the flexible arc plates (24) in a sticking way.
The rigid arc plate (20) is formed by rolling a steel plate with the thickness of 10 mm. The flexible arc plate (24) is formed by cutting a rubber plate with the thickness of 2 mm.
The arc plate position control spring (21) is made of spring materials with the diameter of 2 cm.
The arc plate pull rope (22) adopts a steel wire rope with the diameter of 1 cm.
The pull rope guide pipe (23) is made of a steel pipe with the diameter of 20 mm.
The guide pipe reinforcing rib (25) is made of a reinforcing steel bar with the diameter of 10 mm.
The pile body reinforcement cage (26) is composed of longitudinal reinforcements (9) and hoop reinforcements (8). Wherein the hoop reinforcement (8) adopts a twisted steel bar with the diameter of 12 mm; the longitudinal steel bars (9) adopt thread steel bars with the diameter of 25 mm.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a bored concrete pile concrete filling device, sets up on ground soil body (1), its characterized in that includes:
the concrete vibrating rod comprises a pile side pile casing (7) which is arranged in a foundation soil body (1) in a striking mode, platform supporting piers (2) and supporting plate anchor bars (3) which are positioned on the foundation soil body (1) and are arranged at intervals relative to two sides of the pile side pile casing (7), wherein a working platform plate (4) is arranged at the top end of each platform supporting pier (2), connecting pipe guide pipes (11) are arranged on a casting platform plate (10) at uniform intervals along the circumferential direction, a lifting control body (12) and a vibrating rod control panel (13) are sequentially arranged on the upper surface of the casting platform plate (10) from bottom to top, and a vibrating rod connecting pipe (15) of a concrete vibrating rod (14) sequentially penetrates through the connecting pipe guide pipes (11) and the vibrating rod control panel (13) from bottom to top;
a pile body reinforcement cage (26) is arranged in the pile side pile casing (7), and the pile body reinforcement cage (26) consists of longitudinal reinforcements (9) and circumferential stirrups (8);
when there is bad soil layer (27) in foundation soil body (1), pile body steel reinforcement cage (26) outside at bad soil layer (27) position sets up perfusion control sleeve pipe (19), perfusion control sleeve pipe (19) connect vertical reinforcing bar (9), wherein perfusion control sleeve pipe (19) adopt rigidity arc board (20) and flexible arc board (24) interval to lay and form, set up arc board accuse position spring (21) between rigidity arc board (20) and vertical reinforcing bar (9) of perfusion control sleeve pipe (19), arc board stay cord (22) one end is connected with rigidity arc board (20) of perfusion control sleeve pipe (19), the other end passes stay cord stand pipe (23) on arc board stay cord (22) the back and links to each other with outside book draws equipment.
2. The bored pile concrete pouring device according to claim 1, wherein a guide tube reinforcing bar (25) is provided between the longitudinal reinforcement bar (9) and the pull rope guide tube (23).
3. The bored pile concrete pouring device according to claim 1, wherein the pouring control sleeve (19) is formed in a structure having a circular cross section, and the number of the rigid arc plates (20) and the flexible arc plates (24) is the same.
4. The bored pile concrete pouring device according to claim 1, wherein the rigid arc plate (20) and the flexible arc plate (24) are connected by adhesion or by bolts; the rigid arc plate (20) is formed by rolling a steel plate, and the flexible arc plate (24) is a rubber plate.
5. The bored pile concrete pouring device according to claim 1, wherein the arc plate pulling rope (22) intersects at a position of a circle center of the pouring control sleeve (19).
6. The bored pile concrete pouring device according to any one of claims 1 to 5, wherein a flexible ferrule (16) is provided at a corresponding position on the vibrating rod position control plate (13), and the vibrating rod connecting tube (15) passes through the flexible ferrule (16), and the vibrating rod connecting tube (15) is firmly connected with the flexible ferrule (16) through a ferrule fastening rib (17).
7. The bored pile concrete pouring device according to claim 6, wherein the flexible ferrule (16) is made of rubber material and is adhesively connected to the vibrating rod position control plate (13).
8. The cast-in-place bored pile concrete pouring device according to any one of claims 1 to 5, wherein 3 to 6 connecting pipe guide pipes (11) are preset on the casting platform plate (10) at uniform intervals in the circumferential direction, and the casting platform plate (10) is vertically welded to the connecting pipe guide pipes (11).
9. The cast-in-place bored pile concrete pouring device according to any one of claims 1 to 5, wherein a bracing support plate (5) connected to the foundation soil body (1) is provided at the upper end of the support plate anchor bar (3), and a pier-side bracing (6) is provided between the platform support pier (2) and the bracing support plate (5).
10. The cast-in-place bored pile concrete pouring device according to any one of claims 1 to 5, wherein the platform support pier (2) is disposed adjacent to the pile side casing (7), the shoe anchor (3) is located outside the platform support pier (2), and the platform support pier (2) is higher than the pile side casing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921313383.2U CN211036992U (en) | 2019-08-09 | 2019-08-09 | Bored concrete pile concrete pouring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921313383.2U CN211036992U (en) | 2019-08-09 | 2019-08-09 | Bored concrete pile concrete pouring device |
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| Publication Number | Publication Date |
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| CN211036992U true CN211036992U (en) | 2020-07-17 |
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| CN201921313383.2U Active CN211036992U (en) | 2019-08-09 | 2019-08-09 | Bored concrete pile concrete pouring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281849A (en) * | 2020-09-03 | 2021-01-29 | 宁波汇洲生态建设有限公司 | Concrete filling pile construction equipment and construction method |
| CN114837187A (en) * | 2022-03-28 | 2022-08-02 | 中冶集团武汉勘察研究院有限公司 | Support device for installing cast-in-place bored pile concrete pouring guide pipe and use method thereof |
| CN115522537A (en) * | 2022-09-26 | 2022-12-27 | 中交(福州)建设有限公司 | Ultra-deep punching cast-in-place pile construction system and method suitable for large-water-head soft foundation |
| CN117051834A (en) * | 2023-08-30 | 2023-11-14 | 中交一公局第一工程有限公司 | Construction method for automatically pulling up steel casing in stages in complex stratum |
-
2019
- 2019-08-09 CN CN201921313383.2U patent/CN211036992U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281849A (en) * | 2020-09-03 | 2021-01-29 | 宁波汇洲生态建设有限公司 | Concrete filling pile construction equipment and construction method |
| CN112281849B (en) * | 2020-09-03 | 2022-04-08 | 宁波汇洲生态建设有限公司 | Concrete filling pile construction equipment and construction method |
| CN114837187A (en) * | 2022-03-28 | 2022-08-02 | 中冶集团武汉勘察研究院有限公司 | Support device for installing cast-in-place bored pile concrete pouring guide pipe and use method thereof |
| CN115522537A (en) * | 2022-09-26 | 2022-12-27 | 中交(福州)建设有限公司 | Ultra-deep punching cast-in-place pile construction system and method suitable for large-water-head soft foundation |
| CN115522537B (en) * | 2022-09-26 | 2025-08-19 | 中交(福州)建设有限公司 | Ultra-deep punching bored pile construction system and method suitable for large-head soft foundation |
| CN117051834A (en) * | 2023-08-30 | 2023-11-14 | 中交一公局第一工程有限公司 | Construction method for automatically pulling up steel casing in stages in complex stratum |
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