CN111622211A - Underwater pipe pile connecting system and installation method thereof - Google Patents
Underwater pipe pile connecting system and installation method thereof Download PDFInfo
- Publication number
- CN111622211A CN111622211A CN202010479317.3A CN202010479317A CN111622211A CN 111622211 A CN111622211 A CN 111622211A CN 202010479317 A CN202010479317 A CN 202010479317A CN 111622211 A CN111622211 A CN 111622211A
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- Prior art keywords
- steel pipe
- track
- pipe pile
- rod piece
- rod
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/16—Foundations formed of separate piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an underwater pipe pile connecting system and an installation method thereof, and relates to the field of water engineering construction. The invention can effectively improve the construction efficiency and the construction quality of the connection system operation.
Description
Technical Field
The invention relates to the field of water engineering construction, in particular to an underwater pipe pile connecting system and an installation method thereof.
Background
At present, the underwater connection system of the overwater construction platform in deep water foundations at home and abroad is mostly installed in a manual underwater direct welding or bolting mode, the construction method is usually that after the construction of steel pipe piles is finished, an operator firstly measures the design position of the connection system and the distance between the steel pipe piles underwater, then cuts, assembles and welds the rod pieces of the connection system according to measured data, and finally integrally transfers the assembled and welded connection system to the water for underwater welding.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an underwater pipe pile connecting system and an installation method of the underwater pipe pile connecting system, which can effectively improve the construction efficiency and the construction quality of the connecting system operation.
In order to achieve the above object, the present invention provides an underwater pipe pile connection system, which includes a connection tie member and rails disposed at two ends of the connection tie member, wherein the rails at two ends of the connection tie member are disposed on the side surfaces of the steel pipe piles, and the rails are disposed along the height direction of the steel pipe piles, for the rails at two ends of the connection tie member, one end of the connection tie member is disposed in one rail, the other end of the connection tie member is disposed in the other rail so that the connection tie member can slide along the rail, the rail at one end of the connection tie member is disposed on the side surface of one steel pipe pile, the rail at the other end of the connection tie member is disposed on the side surface of the adjacent steel pipe pile of the steel pipe pile, and the rails at two.
On the basis of the technical scheme, the lower end of the track is provided with a stopper.
On the basis of the technical scheme, the lower end of the track at one end of the two ends of the connecting tie rod piece is provided with a height-adjusting steel base plate, and the height-adjusting steel base plate is positioned above the limiting device.
On the basis of the technical scheme, the connecting tie rod piece comprises an upper cross rod, an inclined rod and a lower cross rod.
The invention provides an installation method of an underwater pipe pile connection system, which is used for installing the underwater pipe pile connection system and comprises the following steps:
s1: welding a track on the steel pipe pile, and arranging a limiting stopper below the track;
s2: inserting and driving the steel pipe piles to a set position, and ensuring that the tracks on two adjacent steel pipe piles are opposite;
s3: placing one end of the connecting tie rod piece on a track of a steel pipe pile, placing the other end of the connecting tie rod piece on the track of the steel pipe pile connected with the steel pipe pile, and sliding the connecting tie rod piece to a position of a limiting stopper along the track to finish the installation of the connecting tie rod pieces between the adjacent steel pipe piles;
s4: and repeating the step S3 to finish the installation of the connecting tie bars between other adjacent steel pipe piles until the construction of the connecting tie bars of all the steel pipe piles is finished.
On the basis of the technical scheme, the rail is welded on the steel pipe pile, and the stopper is arranged below the rail, and the concrete steps comprise:
according to the design, determining the pipe diameter, the wall thickness and the pile spacing of the steel pipe pile and the size of a connecting tie rod piece;
processing a steel pipe pile, a connecting tie rod piece, a track and a limiter;
welding the track on the steel pipe pile, and welding a limiting stopper below the track.
On the basis of the technical scheme, the steel pipe piles are driven to the set positions in an inserting mode, the tracks on the two adjacent steel pipe piles are guaranteed to be right opposite, and the concrete steps include:
installing the floating crane to a set position, and anchoring and positioning the floating crane;
and (4) inserting and driving the steel pipe piles by using the floating crane, inserting and driving the steel pipe piles to a set position, and ensuring that the tracks on the two adjacent steel pipe piles are right opposite.
On the basis of the technical scheme, the height-adjusting steel base plate is arranged at the lower end of the track at one end of the two ends of the connecting tie rod piece and used for ensuring that the connecting tie rod piece after installation between the adjacent steel pipe piles is in a horizontal state.
On the basis of the technical scheme, the connecting tie rod piece comprises an upper cross rod, an inclined rod and a lower cross rod.
On the basis of the technical scheme, one end of the connecting tie rod piece is placed on a track of the steel pipe pile, the other end of the connecting tie rod piece is placed on the track of the steel pipe pile connected with the steel pipe pile, and the connecting tie rod piece slides downwards along the track to a position of the limiting stopper;
for the installation of the connecting tie rod pieces between the adjacent steel pipe piles, one end of a lower cross rod is placed on a track of one steel pipe pile, the other end of the lower cross rod is placed on a track of the other steel pipe pile, and the lower cross rod slides downwards along the track to a position of a limiting stopper;
placing one end of the diagonal rod on a track of one steel pipe pile, placing the other end of the diagonal rod on a track of the other steel pipe pile, and sliding the diagonal rod downwards along the track until the bottom of the diagonal rod abuts against the lower cross rod;
one end of the upper cross rod is placed on a track of one steel pipe pile, the other end of the upper cross rod is placed on a track of the other steel pipe pile, and the upper cross rod slides downwards along the track to enable the lower surface of the upper cross rod to abut against the top of the inclined rod.
Compared with the prior art, the invention has the advantages that: through setting up the track on the steel-pipe pile, treat that the steel-pipe pile is inserted and is beaten the back that targets in place, realize transferring and the installation of connecting the system member through the track on the steel-pipe pile, need not to carry out underwater operation and can realize the installation of connecting the system member, effectively promoted the efficiency of construction and the construction quality of connecting the system operation, reduced construction risk, construction cycle and the construction degree of difficulty.
Drawings
FIG. 1 is a schematic view of a connection system between underwater piles according to an embodiment of the present invention;
fig. 2 is a top view of an underwater pile connection system according to an embodiment of the present invention.
In the figure: 1-connecting tie rods, 2-rails, 3-steel pipe piles, 4-limiters, 5-heightening steel base plates, 6-upper cross rods, 7-diagonal rods, 8-lower cross rods and 9-C-shaped steel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides an underwater pipe pile connection system, configured to connect underwater pipe piles after insertion and driving, specifically including a connection system member 1 and rails 2 disposed at two ends of the connection system member 1, where the rails 2 at two ends of the connection system member 1 are disposed on side surfaces of steel pipe piles 3, and the rails 2 are disposed along a height direction of the steel pipe piles 3, and for the rails 2 at two ends of the connection system member 1, one end of the connection system member 1 is located in one rail 2, and the other end is located in the other rail 2, so that the connection system member 1 can slide along the rail 2, the rail 2 at one end of the connection system member 1 is located on a side surface of one steel pipe pile 3, the rail 2 at the other end of the connection system member 1 is located on a side surface of the steel pipe pile 3 adjacent to the steel pipe pile 3, and the rails 2 at two ends of the connection system member.
After the steel pipe pile 3 is inserted and beaten, the connection tie member 1 is transferred through the track 2 on the adjacent steel pipe pile 3, the connection between the adjacent steel pipe pile 3 is realized to the connection tie member 1 after the transfer is accomplished, and the constructor can realize the installation of the connection tie member 1 between the steel pipe pile 3 without underwater operation. Of course, after the connection tie member 1 is completely lowered, the gap between the connection tie member 1 and the steel pipe pile 3 may be filled with a rubber mat or mortar.
Further, the lower extreme of track 2 is equipped with stopper 4 for carry on spacingly to the connection system member 1 after transferring, in order to guarantee that connection system member 1 is in the horizontality, in order to realize better connection fixed function. The track 2 lower extreme of the wherein one end at connecting system member 1 both ends is equipped with heightening steel backing plate 5, heightening steel backing plate 5 is located stopper 4 top, because the depth of penetration of every steel-pipe pile 3 is probably different, alright can lead to the stopper 4 of installation not at same height on the steel-pipe pile 3, leads to transferring connecting system member 1 after accomplishing not to be in the horizontality, consequently, can be through setting up the mode of heightening steel backing plate 5 on stopper 4, heighten steel backing plate 5 through the adjustment, make connecting system member 1 below both ends be in the horizontality. The connecting tie member 1 comprises an upper cross bar 6, a diagonal bar 7 and a lower cross bar 8. Referring to fig. 2, the connecting tie member 1 is provided with C-shaped steels 9 at both ends thereof.
According to the underwater pipe pile connection system provided by the embodiment of the invention, the tracks 2 are arranged on the steel pipe piles 3, after the steel pipe piles 3 are inserted and beaten in place, the connection system rod pieces 1 are lowered and installed through the tracks 2 on the steel pipe piles 3, the connection system rod pieces 1 can be installed without underwater operation, the construction efficiency and the construction quality of connection system operation are effectively improved, and the construction risk, the construction period and the construction difficulty are reduced.
The embodiment of the invention provides an installation method of an underwater pipe pile connection system, which is used for installing the underwater pipe pile connection system, and the installation method comprises the following steps:
s1: welding a track 2 on a steel pipe pile 3, and arranging a limiting stopper 4 below the track 2;
s2: inserting and driving the steel pipe piles 3 to a set position, and ensuring that the tracks 2 on two adjacent steel pipe piles 3 are opposite;
s3: placing one end of a connecting tie rod piece 1 on a track 2 of a steel pipe pile 3, placing the other end of the connecting tie rod piece on the track 2 of the steel pipe pile 3 connected with the steel pipe pile 3, sliding the connecting tie rod piece 1 to a position of a limiting stopper 4 along the track 2 downwards, and completing installation of the connecting tie rod pieces 1 between the adjacent steel pipe piles 3;
s4: and repeating the step S3 to finish the installation of the connecting tie members 1 between other adjacent steel pipe piles 3 until the construction of the connecting tie members 1 of all the steel pipe piles 3 is finished.
Wherein, weld track 2 on steel-pipe pile 3 to set up stopper 4 in the below of track 2, concrete step includes:
s101: according to the design, determining the pipe diameter, the wall thickness and the pile spacing of the steel pipe pile 3 and the size of the connecting tie rod piece 1;
s102: processing a steel pipe pile 3, a connecting tie rod piece 1, a track 2 and a limiter 4;
s103: welding the track 2 on the steel pipe pile 3, and welding a limiting stopper 4 below the track 2.
In the embodiment of the invention, the steel pipe piles 3 are driven to the set positions in an inserting way, and the tracks 2 on the two adjacent steel pipe piles 3 are ensured to be opposite, and the concrete steps comprise:
s201: installing the floating crane to a set position, and anchoring and positioning the floating crane;
s202: and (3) inserting and driving the steel pipe piles (3) by using the floating crane, inserting and driving the steel pipe piles (3) to a set position, and ensuring that the tracks (2) on the two adjacent steel pipe piles (3) are right opposite.
The lower end of the track 2 at one end of the two ends of the connecting tie rod piece 1 is provided with a height-adjusting steel base plate 5, and the height-adjusting steel base plate 5 is used for ensuring that the connecting tie rod piece 1 after installation between the adjacent steel pipe piles 3 is in a horizontal state. The connecting tie member 1 comprises an upper cross bar 6, a diagonal bar 7 and a lower cross bar 8.
Placing one end of a connecting tie rod piece 1 on a track 2 of a steel pipe pile 3, placing the other end of the connecting tie rod piece on the track 2 of the steel pipe pile 3 connected with the steel pipe pile 3, and sliding the connecting tie rod piece 1 to a position of a limiting stopper 4 along the track 2;
for the installation of the connecting tie rod pieces 1 between the adjacent steel pipe piles 3, one end of a lower cross rod 8 is placed on a track 2 of one steel pipe pile 3, the other end of the lower cross rod is placed on a track 2 of the other steel pipe pile 3, and the lower cross rod 8 slides down to a position of a limiting stopper 4 along the track 2;
placing one end of an inclined rod 7 on a track 2 of one steel pipe pile 3, placing the other end of the inclined rod on a track 2 of the other steel pipe pile 3, and sliding the inclined rod 7 downwards along the track 2 until the bottom of the inclined rod 7 abuts against a lower cross rod 8;
one end of the upper cross rod 6 is placed on the track 2 of one steel pipe pile 3, the other end of the upper cross rod 6 is placed on the track 2 of the other steel pipe pile 3, and the upper cross rod 6 slides downwards along the track 2 to enable the lower surface of the upper cross rod 6 to abut against the top of the inclined rod 7.
After the connecting tie rod member 1 is installed, the stability of the installation of the connecting tie rod member 1 is checked, and a part with a large gap can be filled with a rubber pad or mortar. If the connection between the steel pipe piles 3 is a double-layer connection, the method for installing the connection between the underwater pipe piles according to the present invention is also applicable, and when installing the double-layer connection, the lower connection is installed by lowering first, and then the upper connection is installed by lowering.
According to the installation method of the underwater pipe pile connection system, the rails 2 are arranged on the steel pipe piles 3, after the steel pipe piles 3 are inserted and beaten in place, the connection system rod pieces 1 are placed down and installed through the rails 2 on the steel pipe piles 3, the connection system rod pieces 1 can be installed without underwater operation, the construction efficiency and the construction quality of the connection system operation are effectively improved, and the construction risk, the construction period and the construction difficulty are reduced.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. An underwater pipe pile connecting system is characterized in that: the steel pipe pile connecting structure comprises a connecting system rod piece (1) and tracks (2) arranged at two ends of the connecting system rod piece (1), wherein the tracks (2) at two ends of the connecting system rod piece (1) are used for being arranged on the side face of a steel pipe pile (3), the tracks (2) are arranged along the height direction of the steel pipe pile (3), the tracks (2) at two ends of the connecting system rod piece (1) are located in one track (2), one end of the connecting system rod piece (1) is located in the other track (2) so that the connecting system rod piece (1) can slide along the tracks (2), the track (2) at one end of the connecting system rod piece (1) is located on the side face of one steel pipe pile (3), the track (2) at the other end of the connecting system rod piece (1) is located on the side face of the adjacent steel pipe pile (3) of the steel pipe pile (3), and the tracks (2) at two ends.
2. The underwater pile connection system of claim 1, wherein: and a limiter (4) is arranged at the lower end of the track (2).
3. The underwater pile connection system of claim 2, wherein: the lower end of the track (2) at one end of the two ends of the connecting tie rod piece (1) is provided with a height-adjusting steel base plate (5), and the height-adjusting steel base plate (5) is positioned above the limiting stopper (4).
4. The underwater pile connection system of claim 1, wherein: the connecting tie rod piece (1) comprises an upper cross rod (6), an inclined rod (7) and a lower cross rod (8).
5. A method of installing an underwater inter-pile connection system according to claim 1, comprising the steps of:
s1: welding a track (2) on the steel pipe pile (3), and arranging a stopper (4) below the track (2);
s2: inserting and driving the steel pipe piles (3) to a set position, and ensuring that the tracks (2) on two adjacent steel pipe piles (3) are opposite;
s3: one end of a connecting tie rod piece (1) is placed on a track (2) of a steel pipe pile (3), the other end of the connecting tie rod piece is placed on the track (2) of the steel pipe pile (3) connected with the steel pipe pile (3), the connecting tie rod piece (1) slides downwards along the track (2) to a position of a limiting stopper (4), and installation of the connecting tie rod pieces (1) between the adjacent steel pipe piles (3) is completed;
s4: and (8) repeating the step (S3) to finish the installation of the connecting tie members (1) between other adjacent steel pipe piles (3) until the construction of the connecting tie members (1) of all the steel pipe piles (3) is finished.
6. The method for installing an underwater pile connection system according to claim 5, wherein the rail (2) is welded to the steel pipe pile (3), and the stopper (4) is provided below the rail (2), and the method comprises the following steps:
according to the design, determining the pipe diameter, the wall thickness and the pile spacing of the steel pipe pile (3) and the size of the connecting tie rod piece (1);
processing a steel pipe pile (3), a connecting tie rod piece (1), a track (2) and a limiter (4);
welding the track (2) on the steel pipe pile (3), and welding a limiting stopper (4) below the track (2).
7. The method for installing the underwater pipe pile connection system according to claim 5, wherein the steel pipe piles (3) are driven to a set position and the tracks (2) on two adjacent steel pipe piles (3) are ensured to be opposite, and the method comprises the following specific steps:
installing the floating crane to a set position, and anchoring and positioning the floating crane;
and (3) inserting and driving the steel pipe piles (3) by using the floating crane, inserting and driving the steel pipe piles (3) to a set position, and ensuring that the tracks (2) on the two adjacent steel pipe piles (3) are right opposite.
8. The method of claim 5, wherein the method comprises: the lower end of the track (2) at one end of the two ends of the connecting tie rod piece (1) is provided with a height-adjusting steel base plate (5), and the height-adjusting steel base plate (5) is used for ensuring that the connecting tie rod piece (1) after installation between the adjacent steel pipe piles (3) is in a horizontal state.
9. The method of claim 5, wherein the method comprises: the connecting tie rod piece (1) comprises an upper cross rod (6), an inclined rod (7) and a lower cross rod (8).
10. The method for installing the underwater pipe pile connection system according to claim 9, wherein the connecting tie member (1) is placed at one end on a rail (2) of a steel pipe pile (3) and at the other end on the rail (2) of the steel pipe pile (3) connected to the steel pipe pile (3), and the connecting tie member (1) is slid down along the rail (2) to the stopper (4), and the method comprises the following steps;
for the installation of the connecting tie rod piece (1) between the adjacent steel pipe piles (3), one end of a lower cross rod (8) is placed on a track (2) of one steel pipe pile (3), the other end of the lower cross rod is placed on a track (2) of the other steel pipe pile (3), and the lower cross rod (8) slides down to a position of a limiting stopper (4) along the track (2);
one end of the diagonal rod (7) is placed on the track (2) of one steel pipe pile (3), the other end of the diagonal rod is placed on the track (2) of the other steel pipe pile (3), and the diagonal rod (7) slides downwards along the track (2) until the bottom of the diagonal rod (7) abuts against the lower cross rod (8);
one end of the upper cross rod (6) is placed on the track (2) of one steel pipe pile (3), the other end of the upper cross rod is placed on the track (2) of the other steel pipe pile (3), and the upper cross rod (6) slides downwards along the track (2) to abut against the lower surface of the upper cross rod (6) and the top of the inclined rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010479317.3A CN111622211A (en) | 2020-05-29 | 2020-05-29 | Underwater pipe pile connecting system and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010479317.3A CN111622211A (en) | 2020-05-29 | 2020-05-29 | Underwater pipe pile connecting system and installation method thereof |
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| CN111622211A true CN111622211A (en) | 2020-09-04 |
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| CN202010479317.3A Pending CN111622211A (en) | 2020-05-29 | 2020-05-29 | Underwater pipe pile connecting system and installation method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280398A (en) * | 1997-04-07 | 1998-10-20 | Nkk Corp | Landslide preventive steel pipe pile having box-shaped truss or ring truss type pile head connection structure |
| CN104196000A (en) * | 2014-08-01 | 2014-12-10 | 中国铁建大桥工程局集团有限公司 | Rapid construction method for strong-stormy-wave deep sea underwater connection system |
| CN206052689U (en) * | 2016-08-31 | 2017-03-29 | 浙江兴土桥梁临时钢结构工程有限公司 | A kind of steel-pipe pile linked system under water |
| CN206052759U (en) * | 2016-08-31 | 2017-03-29 | 浙江兴土桥梁临时钢结构工程有限公司 | A kind of steel-pipe pile attachment means under water |
| CN107964970A (en) * | 2017-11-30 | 2018-04-27 | 同济大学 | A kind of double steel sheet-pile cofferdam slidingtype reinforcing pull rod system |
| CN110565672A (en) * | 2019-08-28 | 2019-12-13 | 中铁大桥局集团有限公司 | construction method of bare rock low-pile bearing platform foundation |
| CN210459184U (en) * | 2019-08-02 | 2020-05-05 | 杭州市交通工程集团有限公司 | Deepwater steel pipe pile connecting device |
-
2020
- 2020-05-29 CN CN202010479317.3A patent/CN111622211A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280398A (en) * | 1997-04-07 | 1998-10-20 | Nkk Corp | Landslide preventive steel pipe pile having box-shaped truss or ring truss type pile head connection structure |
| CN104196000A (en) * | 2014-08-01 | 2014-12-10 | 中国铁建大桥工程局集团有限公司 | Rapid construction method for strong-stormy-wave deep sea underwater connection system |
| CN206052689U (en) * | 2016-08-31 | 2017-03-29 | 浙江兴土桥梁临时钢结构工程有限公司 | A kind of steel-pipe pile linked system under water |
| CN206052759U (en) * | 2016-08-31 | 2017-03-29 | 浙江兴土桥梁临时钢结构工程有限公司 | A kind of steel-pipe pile attachment means under water |
| CN107964970A (en) * | 2017-11-30 | 2018-04-27 | 同济大学 | A kind of double steel sheet-pile cofferdam slidingtype reinforcing pull rod system |
| CN210459184U (en) * | 2019-08-02 | 2020-05-05 | 杭州市交通工程集团有限公司 | Deepwater steel pipe pile connecting device |
| CN110565672A (en) * | 2019-08-28 | 2019-12-13 | 中铁大桥局集团有限公司 | construction method of bare rock low-pile bearing platform foundation |
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Application publication date: 20200904 |