CN112832275B - Assembly structure of bottom plate and side plate of steel crane and use method of assembly structure - Google Patents
Assembly structure of bottom plate and side plate of steel crane and use method of assembly structure Download PDFInfo
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- CN112832275B CN112832275B CN202110078356.7A CN202110078356A CN112832275B CN 112832275 B CN112832275 B CN 112832275B CN 202110078356 A CN202110078356 A CN 202110078356A CN 112832275 B CN112832275 B CN 112832275B
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- bottom plate
- side plate
- hanging box
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
Abstract
The invention provides an assembling structure of a bottom plate and a side plate of a steel hanging box and a use method thereof. The locking rods can enable the installation and the disassembly of the steel hanging box side plates and the steel hanging box bottom plates to be carried out on the land. The technical scheme has the advantages of stable structure, convenience in disassembly and assembly, capability of completing the assembling and disassembling of the side plates on land, high safety, less bolt consumption, capability of effectively saving the technical effect of labor cost, and wide application in the field of steel hanging box manufacturing and construction methods.
Description
Technical Field
The invention relates to the field of steel hanging boxes, in particular to an assembling structure of a bottom plate and side plates of a steel hanging box and a using method of the assembling structure.
Background
The steel suspension box cofferdam is widely applied to construction of a deep water high pile cap at present, and the structure of the steel suspension box cofferdam mainly comprises four parts, namely a side plate, a bottom plate, an inner support and a suspension system. After the deepwater pile foundation is completed, the steel suspension box is installed and placed by using hoisting equipment, so that the whole steel suspension box (and later back cover concrete) is suspended at the top of a steel pile casing of the pile foundation, then underwater concrete is poured for back cover, after the back cover concrete forms strength, the steel suspension box is combined with the back cover concrete, and is anchored on the steel pile casing of the pile foundation through concrete, after water is pumped out, the original steel suspension box suspension system is removed, and then a series of bearing platform construction is carried out.
At present, in bridge construction, a steel suspension box construction method is mostly adopted for a deepwater bearing platform, and the installation and the disassembly of a bottom plate and a side plate of a traditional steel suspension box require underwater operation personnel, so that the installation efficiency is low and the danger is high.
Chinese patent CN206298901U, "an assembled steel hanging box", includes side walls and a bottom plate, the side walls and the bottom plate are provided with structural beams and panels; the side wall comprises a plurality of unit side plates, the unit side plates are unit side plates which are provided with the structural beams and are rectangular in panel, unit plate connecting edges are arranged on four sides of each unit side plate, and the adjacent unit side plates are mutually connected through the unit plate connecting edges to form the side wall; the periphery of bottom plate is equipped with the bottom plate and connects the limit, the unit board of unit curb plate connect the limit with the bottom plate of bottom plate is connected the limit and is connected, and this structure does not realize the structure of quick installation, and the ann of steel hanging box bottom plate and curb plate is torn open, needs underwater operation personnel, disassembles also very inconvenient.
Disclosure of Invention
The invention mainly aims to provide an assembling structure of a bottom plate and a side plate of a steel hanging box and a using method thereof, and solves the problems that underwater operation personnel are needed for assembling and disassembling the bottom plate and the side plate of the traditional steel hanging box, the assembling efficiency is low, and the danger is high.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a structure of assembling of steel hanging box bottom plate and curb plate, includes curb plate and steel hanging box bottom plate, and the curb plate border is equipped with the support angle limit, and steel hanging box bottom plate bottom is equipped with bottom plate angle limit, and the support angle limit card of curb plate is on bottom plate angle limit, the curb plate passes through the check lock lever with steel hanging box bottom plate and is connected, be equipped with quick latch segment on the bottom plate angle limit of steel hanging box bottom plate, be equipped with on the curb plate and dodge the mouth, the mouth card is dodged to the curb plate on quick latch segment, still is equipped with the quick lever of disassembling on the curb plate, and the quick lever of disassembling is connected with quick latch segment.
In the preferred scheme, the locking rod comprises a screw rod and a locking sleeve, the locking sleeve is sleeved on the screw rod, the screw rod penetrates through supporting angle edges on the upper side and the lower side of the side plate and a bottom plate angle edge of a bottom plate of the steel lifting box, a first locking nut is arranged at the bottom end of the screw rod, the lower end of the locking sleeve abuts against one side of the side plate, the top of the locking sleeve abuts against a second locking nut, and a third locking nut at the upper end of the screw rod abuts against the upper surface of the side plate.
In the preferred scheme, the bottom of the locking sleeve is provided with a base plate which is abutted against the inner side surface of the supporting corner edge at the bottom of the side plate.
In the preferred scheme, a plurality of locating pieces are arranged on a bottom plate of the steel hanging box, and locating grooves matched with the locating pieces are formed in the bottoms of the side plates.
In the preferred scheme, quick latch segment includes the fixing base, and the fixing base both sides are equipped with the latch segment, are equipped with the inclined plane of circular arc on the latch segment, latch segment and fixing base sliding connection, and the latch segment card that dodges mouthful both sides card both sides of curb plate bottom is crossed on the steel crane bottom plate.
In the preferred scheme, be equipped with the third spring between latch segment and the fixing base, be equipped with the wedge groove on the fixing base, the fixing base top is equipped with the slip voussoir, and the cooperation of the wedge groove of slip voussoir and latch segment presses the slip voussoir so that the latch segment retracts inside the fixing base.
In the preferred scheme, be equipped with the fourth spring between slip voussoir and the fixing base, be equipped with on the slip voussoir and compress tightly the post, compress tightly the post and pass the fixing base and disassemble the pole end connection fast.
In the preferred scheme, the quick disassembling rod comprises a sliding rod, the sliding rod is connected with a sliding seat in a sliding mode, a first supporting round table is arranged in the middle of the sliding rod, a first spring is arranged between the first supporting round table and the sliding seat, a second supporting round table is arranged at the bottom of the sliding rod and sleeved on the compression column, a second spring is arranged between the second supporting round table and the fixed seat, a top plate is arranged at the top of the sliding rod, a jacking nut is arranged above the top plate, and the jacking nut penetrates through the side plate and abuts against the top plate;
the jacking nut is rotated to press the sliding rod downwards, so that the end part of the sliding rod compresses the compression column to enable the locking block to loosen the connection between the bottom plate and the side plate of the steel hanging box.
In the preferred scheme, curb plate one side is equipped with first cooperation groove, and the opposite side is equipped with first connecting block, a plurality of curb plates are connected through first cooperation groove and first connecting block, and a plurality of curb plate turning junctions are connected through the second connecting block, and second connecting block both sides are equipped with the second cooperation groove of the first connecting block of matching curb plate.
The method comprises the following steps:
s1, placing the bottom plate of the steel crane in place and temporarily fixing the bottom plate;
s2, splicing the side plates, hoisting, lowering and adjusting the side plates to align positioning grooves in the bottoms of the side plates with positioning blocks of the bottom plates of the steel crane box, and positioning and mounting the side plates and the bottom plates of the steel crane box;
s3, clamping the side plate avoiding opening on a quick locking block of the bottom plate of the steel crane, and quickly locking the position of the side plate by the quick locking block;
s4, installing a locking rod to penetrate through a side plate and a bottom plate of the steel hanging box, installing a first locking nut at the bottom of the locking rod, sleeving a locking sleeve on the side plate in a sleeving manner, enabling a base plate at the bottom of the locking sleeve to abut against a supporting corner edge at the bottom of the side plate, installing a second locking nut, pressing the locking sleeve by the second locking nut, locking a third locking nut, and locking the side plate and the bottom plate of the steel hanging box;
s5, when the adjacent side plates are installed again, the second connecting block is hoisted and slidably installed;
s6, when the quick locking block is disassembled, the jacking nut is rotated to press the sliding rod downwards, so that the end part of the sliding rod compresses the compression column to enable the locking block to loosen the connection between the bottom plate and the side plate of the steel hanging box.
The invention provides an assembling structure of a bottom plate and a side plate of a steel hanging box and a use method thereof. The technical scheme has the advantages of stable structure, convenience in disassembly and assembly, capability of completing the assembling and disassembling of the side plates on land, high safety, less bolt consumption, capability of effectively saving the technical effect of labor cost, and wide application in the field of steel hanging box manufacturing and construction methods.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a general block diagram of the present invention;
FIG. 2 is a disassembled structure view of the side plate and the bottom plate of the steel suspension box of the present invention;
FIG. 3 is a view of the positioning slot on the bottom of the side plate of the present invention;
FIG. 4 is a structural view of the installation of the side plates and the bottom plate of the steel suspension box;
FIG. 5 is a sectional view of the lock lever of the present invention;
FIG. 6 is an enlarged sectional view of the lock lever of the present invention;
FIG. 7 is a disassembled view of the locking lever of the present invention;
FIG. 8 is a view of the quick release lever and quick locking block installation of the present invention;
FIG. 9 is a sectional view of the installation structure of the quick release lever and the quick locking block of the present invention;
FIG. 10 is a cross-sectional enlarged mounting structure view of the quick release lever and quick locking block of the present invention;
FIG. 11 is a cross-sectional view of the quick lock block of the present invention;
FIG. 12 is a disassembled view of the side plate and the connecting block of the present invention;
FIG. 13 is a view of the adjacent side panel mounting structure of the present invention;
in the figure: a side plate 1; a first connection block 101; a first mating groove 102; a support corner edge 103; a slide mount 104; an avoidance port 105; a positioning groove 106; a steel suspension box bottom plate 2; a positioning block 201; a floor corner edge 202; a second connecting block 3; a second mating groove 301; a locking lever 4; a screw 401; a locking sleeve 402; a backing plate 403; a first locking nut 404; a second lock nut 405; a third lock nut 406; a quick locking block 5; a fixed seat 501; a locking block 502; a sliding wedge 503; a wedge groove 504; a third spring 505; a hold-down post 506; a fourth spring 507; rapidly disassembling the rod 6; a slide bar 601; a jacking nut 602; a top plate 603; a first support pedestal 604; a first spring 605; a second support boss 606; a second spring 607.
Detailed Description
Example 1
As shown in fig. 1-13, an assembling structure of a bottom plate and a side plate of a steel hanging box comprises a side plate 1 and a bottom plate 2 of the steel hanging box, wherein a supporting corner edge 103 is arranged on the periphery of the side plate 1, a bottom plate corner edge 202 is arranged at the bottom of the bottom plate 2 of the steel hanging box, the supporting corner edge 103 of the side plate 1 is clamped on the bottom plate corner edge 202, the side plate 1 is connected with the bottom plate 2 of the steel hanging box through a locking rod 4, a quick locking block 5 is arranged on the bottom plate corner edge 202 of the bottom plate 2 of the steel hanging box, an avoiding opening 105 is arranged on the side plate 1, the avoiding opening 105 of the side plate 1 is clamped on the quick locking block 5, a quick disassembling rod 6 is further arranged on the side plate 1, and the quick disassembling rod 6 is connected with the quick locking block 5. The position connection can be carried out earlier to 1 bottom of curb plate and steel hanging box bottom plate 2, then through quick latch segment 5 with 1 quick locking of curb plate on steel hanging box bottom plate 2, reach the technique of 1 quick locking after fixing a position earlier of curb plate, it is also more convenient to make installation curb plate 1, after the quick locking, consolidate locking to curb plate 1 and steel hanging box bottom plate 2 through check lock lever 4, check lock lever 4 can make the ann of steel hanging box curb plate 1 and steel hanging box bottom plate 2 tear open and to go on the land.
In a preferable scheme, the locking rod 4 comprises a screw rod 401 and a locking sleeve 402, the locking sleeve 402 is sleeved on the screw rod 401, the screw rod 401 penetrates through the supporting corner edges 103 on the upper side and the lower side of the side plate 1 and the bottom plate corner edge 202 of the bottom plate 2 of the steel hanging box, a first locking nut 404 is arranged at the bottom end of the screw rod 401, the lower end of the locking sleeve 402 abuts against one side of the side plate 1, the top of the locking sleeve 402 abuts against a second locking nut 405, and a third locking nut 406 at the upper end of the screw rod 401 abuts against the upper surface of the side plate 1. With the structure shown in fig. 4-6, when disassembling, the side plate 1 and the steel suspension box bottom plate 2 can be loosened only by loosening the second locking nut 405 and the third locking nut 406, and the locking rod 4 can ensure that the assembling and disassembling of the steel suspension box side plate 1 and the steel suspension box bottom plate 2 can be carried out on the land.
In a preferable scheme, a backing plate 403 is arranged at the bottom of the locking sleeve 402, and the backing plate 403 abuts against the inner side surface of the supporting corner edge 103 at the bottom of the side plate 1. The backing plate 403 is used to increase the contact area and make the installation more stable.
In the preferred scheme, a plurality of locating blocks 201 are arranged on the bottom plate 2 of the steel suspension box, and the locating grooves 106 matched with the locating blocks 201 are arranged at the bottom of the side plate 1. 2-3, the positioning block 201 and the positioning slot 106 are matched to enable the installation to be connected in a positioning way.
In the preferred scheme, quick latch segment 5 is equipped with the inclined plane that the latch segment 502 was equipped with the circular arc including fixing base 501 both sides, and latch segment 502 and fixing base 501 sliding connection, the latch segment 502 card that the both sides were crossed to the dodge mouth 105 both sides of curb plate 1 bottom is blocked on steel crane bottom plate 2. A third spring 505 is arranged between the locking block 502 and the fixed seat 501, a wedge groove 504 is arranged on the fixed seat 501, a sliding wedge 503 is arranged above the fixed seat 501, the sliding wedge 503 is matched with the wedge groove 504 of the locking block 502, the sliding wedge 503 is pressed to enable the locking block 502 to retract into the fixed seat 501, a fourth spring 507 is arranged between the sliding wedge 503 and the fixed seat 501, a pressing column 506 is arranged on the sliding wedge 503, and the pressing column 506 penetrates through the fixed seat 501 to be connected with the end of the quick disassembling rod 6. With the configuration shown in fig. 11, the sliding wedge 503 is depressed to retract the locking block 502 for easy opening.
In a preferable scheme, the quick disassembling rod 6 comprises a sliding rod 601, the sliding rod 601 is slidably connected with a sliding seat 104, a first supporting circular table 604 is arranged in the middle of the sliding rod 601, a first spring 605 is arranged between the first supporting circular table 604 and the sliding seat 104, a second supporting circular table 606 is arranged at the bottom of the sliding rod 601, the second supporting circular table 606 is sleeved on a compression column 506, a second spring 607 is arranged between the second supporting circular table 606 and a fixed seat 501, a top plate 603 is arranged at the top of the sliding rod 601, a jacking nut 602 is arranged above the top plate 603, and the jacking nut 602 penetrates through a side plate 1 and abuts against the top plate 603. Rotating the jacking nut 602 depresses the sliding bar 601 so that the end of the sliding bar 601 compresses the compression post 506 to cause the locking block 502 to release the connection between the steel box bottom panel 2 and the side panel 1.
In the preferred scheme, 1 one side of curb plate is equipped with first cooperation groove 102, and the opposite side is equipped with first connecting block 101, a plurality of curb plates 1 are connected through first cooperation groove 102 and first connecting block 101, and the corner junction of a plurality of curb plates 1 is connected through second connecting block 3, and 3 both sides of second connecting block are equipped with the second cooperation groove 301 that matches the first connecting block 101 of curb plate 1. The second connecting block 3 is used for connecting the side plate 1 which is connected with the right angle, and the second connecting block 3 is locked on the bottom plate 2 of the steel crane through the locking rod 4.
Example 2
As further described in connection with example 1, the construction shown in fig. 1-13 places the steel crane floor 2 in place and temporarily fixes it.
And splicing the side plate 1, hoisting, lowering and positioning, aligning the positioning groove 106 at the bottom of the side plate 1 and the positioning block 201 of the bottom plate 2 of the steel hanging box, and positioning and installing the side plate 1 and the bottom plate 2 of the steel hanging box.
The side plate 1 avoiding opening 105 is clamped on the quick locking block 5 of the steel crane bottom plate 2, and the quick locking block 5 quickly locks the position of the side plate 1.
The locking rod 4 is installed to penetrate through the side plate 1 and the bottom plate 2 of the steel hanging box, the first locking nut 404 is installed at the bottom of the locking rod 4, the locking sleeve 402 is sleeved on the side plate 1, the base plate 403 at the bottom of the locking sleeve 402 abuts against the supporting corner edge 103 at the bottom of the side plate 1, the second locking nut 405 is installed, the locking sleeve 402 is pressed tightly by the second locking nut 405, the third locking nut 406 is locked, and the side plate 1 and the bottom plate 2 of the steel hanging box are locked.
When the adjacent side plates 1 are installed again, the second connecting blocks 3 are hoisted and slidably installed on the second connecting blocks 3.
When the quick locking block 5 is detached, the jacking nut 602 is rotated to press down the sliding rod 601, so that the end part of the sliding rod 601 compresses the compression column 506 to enable the locking block 502 to release the connection between the bottom plate 2 and the side plate 1 of the steel suspension box.
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 (5)
1. The utility model provides a structure of assembling of steel hanging box bottom plate and curb plate, characterized by: the steel hanging box comprises a side plate (1) and a steel hanging box bottom plate (2), wherein supporting corner edges (103) are arranged on the periphery of the side plate (1), bottom plate corner edges (202) are arranged at the bottom of the steel hanging box bottom plate (2), the supporting corner edges (103) of the side plate (1) are clamped on the bottom plate corner edges (202), the side plate (1) is connected with the steel hanging box bottom plate (2) through a locking rod (4), a quick locking block (5) is arranged on the bottom plate corner edges (202) of the steel hanging box bottom plate (2), an avoiding opening (105) is formed in the side plate (1), the avoiding opening (105) of the side plate (1) is clamped on the quick locking block (5), a quick disassembling rod (6) is further arranged on the side plate (1), and the quick disassembling rod (6) is connected with the quick locking block (5);
the quick locking block (5) comprises a fixed seat (501), locking blocks (502) are arranged on two sides of the fixed seat (501), an arc inclined plane is arranged on each locking block (502), each locking block (502) is connected with the fixed seat (501) in a sliding mode, and the locking blocks (502) passing through two sides of the avoidance port (105) at the bottom of the side plate (1) are clamped on the bottom plate (2) of the steel hanging box;
a fourth spring (507) is arranged between the sliding wedge block (503) and the fixed seat (501), a pressing column (506) is arranged on the sliding wedge block (503), and the pressing column (506) penetrates through the fixed seat (501) to be connected with the end part of the quick disassembling rod (6);
the quick disassembling rod (6) comprises a sliding rod (601), the sliding rod (601) is connected with a sliding seat (104) in a sliding mode, a first supporting circular table (604) is arranged in the middle of the sliding rod (601), a first spring (605) is arranged between the first supporting circular table (604) and the sliding seat (104), a second supporting circular table (606) is arranged at the bottom of the sliding rod (601), the second supporting circular table (606) is sleeved on a compression column (506), a second spring (607) is arranged between the second supporting circular table (606) and a fixed seat (501), a top plate (603) is arranged at the top of the sliding rod (601), a jacking nut (602) is arranged above the top plate (603), and the jacking nut (602) penetrates through a side plate (1) and abuts against the top plate (603);
rotating the jacking nut (602) to press down the sliding rod (601) so that the end part of the sliding rod (601) compresses the compression column (506) to enable the locking block (502) to release the connection between the steel hanging box bottom plate (2) and the side plate (1);
a first matching groove (102) is formed in one side of each side plate (1), a first connecting block (101) is arranged on the other side of each side plate (1), the side plates (1) are connected with the first connecting blocks (101) through the first matching grooves (102), corner joints of the side plates (1) are connected through second connecting blocks (3), and second matching grooves (301) matched with the first connecting blocks (101) of the side plates (1) are formed in the two sides of each second connecting block (3);
a third spring (505) is arranged between the locking block (502) and the fixed seat (501), a wedge groove (504) is formed in the fixed seat (501), a sliding wedge block (503) is arranged above the fixed seat (501), the sliding wedge block (503) is matched with the wedge groove (504) of the locking block (502), and the sliding wedge block (503) is pressed to enable the locking block (502) to retract into the fixed seat (501).
2. The splicing structure of the bottom plate and the side plates of the steel hanging box as claimed in claim 1, which is characterized in that: locking lever (4) include screw rod (401) and locking sleeve pipe (402), and locking sleeve pipe (402) cover is established on screw rod (401), and support angle limit (103) and bottom plate angle limit (202) of steel hanging box bottom plate (2) of both sides about curb plate (1) are passed in screw rod (401), screw rod (401) bottom is equipped with first lock nut (404), locking sleeve pipe (402) low side is supported and is leaned on curb plate (1) one side, locking sleeve pipe (402) top is supported and is leaned on second lock nut (405), third lock nut (406) of screw rod (401) upper end is supported and is leaned on curb plate (1) upper surface.
3. The splicing structure of the bottom plate and the side plates of the steel hanging box as claimed in claim 2, which is characterized in that: the bottom of the locking sleeve (402) is provided with a backing plate (403), and the backing plate (403) is abutted against the inner side surface of the supporting corner edge (103) at the bottom of the side plate (1).
4. The splicing structure of the bottom plate and the side plates of the steel hanging box as claimed in claim 3, which is characterized in that: a plurality of positioning blocks (201) are arranged on the bottom plate (2) of the steel crane box, and positioning grooves (106) matched with the positioning blocks (201) are formed in the bottom of the side plate (1).
5. The use method of the assembly structure of the bottom plate and the side plate of the steel suspension box as claimed in claim 4, wherein the assembly structure comprises the following steps:
the method comprises the following steps:
s1, placing the bottom plate (2) of the steel crane in place and temporarily fixing;
s2, splicing the side plates (1), lifting, lowering and adjusting the positions of the side plates to align the positioning grooves (106) at the bottoms of the side plates (1) with the positioning blocks (201) of the bottom plates (2) of the steel hanging boxes, and positioning and installing the side plates (1) and the bottom plates (2) of the steel hanging boxes;
s3, the avoidance opening (105) of the side plate (1) is clamped on the quick locking block (5) of the steel crane bottom plate (2), and the quick locking block (5) quickly locks the position of the side plate (1);
s4, installing a locking rod (4) to penetrate through a side plate (1) and a steel hanging box bottom plate (2), installing a first locking nut (404) at the bottom of the locking rod (4), sleeving a locking sleeve (402) on the side plate (1), enabling a base plate (403) at the bottom of the locking sleeve (402) to abut against a supporting corner edge (103) at the bottom of the side plate (1), installing a second locking nut (405), pressing the locking sleeve (402) by the second locking nut (405), locking a third locking nut (406) and locking the side plate (1) and the steel hanging box bottom plate (2);
s5, when the adjacent side plates (1) are installed again, the second connecting block (3) is hoisted and slidably installed on the second connecting block (3);
s6, when the quick locking block (5) is disassembled, the jacking nut (602) is rotated to press the sliding rod (601) downwards, so that the end part of the sliding rod (601) compresses the compression column (506) to enable the locking block (502) to loosen the connection between the steel hanging box bottom plate (2) and the side plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110078356.7A CN112832275B (en) | 2021-01-21 | 2021-01-21 | Assembly structure of bottom plate and side plate of steel crane and use method of assembly structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110078356.7A CN112832275B (en) | 2021-01-21 | 2021-01-21 | Assembly structure of bottom plate and side plate of steel crane and use method of assembly structure |
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| CN112832275B true CN112832275B (en) | 2022-05-27 |
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| CN114703829A (en) * | 2022-02-25 | 2022-07-05 | 中交第二航务工程局有限公司 | Assembly type dense water hanging box template for underwater cast-in-situ concrete pile cap and construction method |
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| CN215290199U (en) * | 2021-01-21 | 2021-12-24 | 中交二航局第一工程有限公司 | Fast-assembled steel hanging box |
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| CA3061782A1 (en) * | 2018-11-15 | 2020-05-15 | Aquapera Industries Inc. | Cofferdam system and method of installing the same |
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| CN107447767A (en) * | 2017-08-10 | 2017-12-08 | 重庆水利电力职业技术学院 | A kind of prefabricated reinforced concrete bottom plate steel lifted trunk and its construction method |
| CN108643207A (en) * | 2018-06-11 | 2018-10-12 | 广西路建工程集团有限公司 | Exempt from bottom concrete steel lifted trunk side plate and bottom board connector and its construction method |
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