CN212835451U - But two double-walled steel cofferdams of two fore shafts plug-in - Google Patents
But two double-walled steel cofferdams of two fore shafts plug-in Download PDFInfo
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- CN212835451U CN212835451U CN202020906552.XU CN202020906552U CN212835451U CN 212835451 U CN212835451 U CN 212835451U CN 202020906552 U CN202020906552 U CN 202020906552U CN 212835451 U CN212835451 U CN 212835451U
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Abstract
The utility model discloses a but two fore shaft plug-in double-walled steel cofferdams belongs to the engineering construction underground structure supporting technical field under water. Comprises a steel box column, a steel box segment and a locking structure; the steel box column comprises two layers of steel box column walls and steel box column rib plates, and the steel box sections comprise two layers of steel box section walls and steel box section rib plates so as to form a double-wall steel structure; the steel box column is provided with two matching ends, and the steel box segment is in locking and inserting connection with the matching ends through a locking structure; each mating end corresponds to two locking structures, and the two locking structures are located at two side ends of the mating end. The utility model provides a but have and prop no purlin double-locking notch plug double-wall steel cofferdam construction technology, the accuracy of make full use of steel case post is inserted and is beaten and take one's place, and the double-locking notch lock of steel case festival section and steel case post both sides connects, realizes that reuse can be dismantled to double-wall steel cofferdam's modular, has avoided the transportation of the whole festival section double-wall steel cofferdam of large-tonnage, hoists, sinks the difficult problem of taking one's place for construction convenience can dismantle reuse, has practiced thrift the cost.
Description
Technical Field
The utility model relates to an underwater engineering construction excavation supporting technical field, concretely relates to but two locking closure plug-in double-walled steel cofferdams.
Background
At present, in the field of engineering construction, deep foundation pit excavation is often performed in underwater structure construction. The foundation pit in water is different from the traditional large-scale building deep foundation pit, and is characterized in that the depth of the foundation pit is large, the influence of water is caused, and the water depth can reach more than 10m sometimes. Therefore, when the underwater construction is carried out, a closed water retaining structure must be formed in the area to be constructed, and the stability of the structure must be ensured during the construction process. Influenced by underwater construction, the water retaining structure must be accurately positioned, and meanwhile, the construction is convenient, and the cost is saved. The water retaining structure in deep water often adopts a double-wall steel cofferdam, and the structure has higher rigidity.
Furthermore, for ease of transport and sinking, steel cofferdams are typically manufactured in sections and hoisted to sink in sections and then welded in situ (see fig. 1). After the cofferdam construction is finished, multiple supports in water are constructed so as to ensure the stability of a supporting structure when water is pumped out and mud is sucked in the cofferdam and an underwater bearing platform is constructed. In the construction process, the self weight of the manufactured cofferdam is large, so that the transportation and sinking operation are troublesome, and in addition, the welding operation of the cofferdam of each section is carried out underwater, so that the great construction inconvenience is brought.
Patent document with publication number CN108677979A discloses a square fabricated double-wall steel cofferdam and its construction method, which uses a supporting system of purlin for positioning; meanwhile, a single locking notch is adopted, and locking connection is realized by using a V-shaped locking block with an outward opening and a rectangular frame locking notch with a notch.
In view of the above-mentioned prior art, the applicant of the present invention has made a lot of repeated and beneficial researches, and the final product has obtained effective results and formed the technical solutions to be described below.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a but two locking closure plug-in double-walled steel cofferdams to solve among the prior art by the construction cost increase problem that leads to because of integral hoisting and transportation construction.
In order to achieve the above object, the present invention provides the following technical solutions:
a double-locking-opening pluggable double-wall steel cofferdam comprises steel box columns, steel box sections and locking structures;
the steel box column comprises two layers of steel box column walls and at least one steel box column rib plate integrally arranged between the two layers of steel box column walls, and the steel box section comprises two layers of steel box section walls and at least one steel box section rib plate integrally arranged between the two layers of steel box section walls so as to form a double-wall steel structure;
the steel box column is provided with two matching ends, and the two steel box sections and the two matching ends are correspondingly locked and inserted through the locking structures one by one;
each matching end corresponds to two locking structures, and the two locking structures are respectively positioned at two side ends of the matching end in a one-to-one correspondence manner.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further, the steel box column comprises a corner column and a side column;
the steel box column walls of the corner columns are in a folded angle shape and are used for being arranged at four corners of the cofferdam;
and the steel box column walls of the side columns are straight and are used for being arranged on each edge of the cofferdam.
Further, the locking structure comprises a steel box locking port and a wall plate hook head;
the steel box locking openings are respectively arranged at two ends of the column wall of each layer of the steel box in a one-to-one correspondence manner;
the wall plate hook heads are respectively arranged at two ends of the wall of each layer of the steel box section in a one-to-one correspondence manner;
the steel box locking port can be correspondingly locked, connected and inserted with the wallboard hook head.
Further, the steel box column is of a double-hollow square steel column structure;
the steel box column is provided with an extending direction, and the steel box column is provided with a first end and a second end along the extending direction; the first end of the steel box column is provided with a cutting edge structure;
the steel box column is provided with a layer of steel box column wall on two opposite sides between the second end and the first end.
Further, channel steel is arranged between the inner layer of hollow square steel and the outer layer of hollow square steel every 3m in the extension direction;
the channel steel is obliquely arranged along an angle of 45 degrees.
Further, at least two steel box section rib plates are uniformly arranged in the steel box sections at intervals of 3 meters in the extending direction of the steel box column;
at least two steel box column floor, along its extending direction is evenly arranged at 3 meters intervals in the steel box column.
Furthermore, the bottom of the rib plate of the steel box section is provided with a side supporting angle steel between two layers of the walls of the steel box section for supporting.
Furthermore, a waterproof material is arranged in the locking structure.
Further, the waterproof material is a waterproof expansion adhesive tape or waterproof cloth.
The utility model has the advantages of as follows:
the utility model provides a but have and prop no purlin double-locking notch plug double-wall steel cofferdam construction technology, the accuracy of make full use of steel case post is inserted and is beaten and take one's place, and the double-locking notch lock of steel case festival section and steel case post both sides connects, realizes that reuse can be dismantled to double-wall steel cofferdam's modular, has avoided the transportation of the whole festival section double-wall steel cofferdam of large-tonnage, hoists, sinks the difficult problem of taking one's place for construction convenience can dismantle reuse, has practiced thrift the cost.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and the structures, proportions, sizes, etc. shown in the present specification are only used to match the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and any modifications of the structures, changes of the proportion relations, or adjustments of the sizes, should still fall within the scope of the technical contents disclosed in the present invention without affecting the functions and the achievable objects of the present invention.
FIG. 1 is a schematic overall plan structure view of a conventional double-wall steel cofferdam;
fig. 2 is a schematic view of the position connection between the steel box column and the steel box segment provided by the embodiment of the present invention;
fig. 3 is a schematic view of an installation position of the locking structure in the embodiment of the present invention;
fig. 4 is a partial enlarged view of the locking structure provided in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of the position of the wall plate hook head in the embodiment of the present invention;
fig. 6 is a schematic view of the position structure of the steel box locking notch in the embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the steel box column comprises a steel box column 1, a steel box column rib plate 11, a steel box column wall 12, a steel box locking notch 13, a steel box section 2, a steel box section rib plate 21, a steel box section wall 22, a wall plate hook head 23, a locking structure 3 and support angle steel 4.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-6, the embodiment of the utility model provides a but double-locking-notch plug-in type double-walled steel cofferdam, including steel box column 1, steel box segment 2 and halving structure 3, insert to beat to take one's place for the accuracy of make full use of steel box column 1, and the halving structure 3 double-locking-notch halving between steel box segment 2 and the steel box column 1 both sides, realize that reuse can be dismantled to the modular of double-walled steel cofferdam, avoided the whole double-walled steel cofferdam of large-tonnage segment in the transportation, hoist and sink the problem of the difficulty of taking one's place, make convenient construction, and can dismantle reuse, effectively practiced thrift construction cost. The specific settings are as follows:
the steel box column 1 is of a hollow square steel column structure; the steel box column 1 has an extension direction, and the steel box column 1 has a first end and a second end along the extension direction; the first end of the steel box column 1 is provided with a cutting edge structure for being inserted into the ground layer through accurate positioning, and construction is facilitated.
The steel box column 1 has a layer of steel box column walls 12 on opposite sides between the second end and the first end, respectively, to form a double-walled rectangular steel structure. Specifically, the steel box column 1 comprises a corner column and side columns, wherein the steel box column wall 12 of the corner column is in a folded angle shape and is used for being arranged at four corners of the cofferdam; the steel box column wall 12 of the side column is straight and is used for being arranged on each edge of the cofferdam.
More specifically, the steel box column 1 is of a double-hollow square steel nested structure which is made of Q345-grade steel and has the thickness of 20 mm; the outer side length of the section of the steel box column 1 perpendicular to the extending direction of the steel box column is 1300mm, and the inner side length of the section is 700 mm; the length of the steel box column 1 can be determined according to actual measurement and calculation. Channel steel is arranged between the inner layer of hollow square steel and the outer layer of hollow square steel every 3m in the extending direction, and the channel steel is obliquely arranged along an angle of 45 degrees.
The steel box section 2 comprises two layers of steel box section walls 22 and a plurality of steel box section rib plates 21 integrally arranged between the two layers of steel box section walls 22; the steel box segment 2 is made of Q345 steel, the thickness of the wall 22 of the steel box segment is 20mm, and the thickness of the rib plate 21 of the steel box segment is 10 mm; each of said steel box sections 2 has a length of 3 m.
Preferably, a plurality of steel box section rib plates 21 are uniformly arranged at intervals of 3 meters in the extending direction of the steel box section 2 along the steel box column 1; two-layer be equipped with a plurality of steel case post floor 11 between the steel case post wall 12, steel case post floor 11 with the level corresponds between the steel case festival floor 21, and staggered arrangement between steel case post floor 11 and the channel-section steel for show the steadiness that promotes the structure.
Further preferably, the bottom of the rib plate 21 of the steel box section is provided with edge support angle iron 4 between two layers of the steel box section walls 22 for supporting, so that the steel box column wall 12 is locally reinforced, the local stress of the steel box column wall can meet the strength requirement under the action of supporting jacking force, and a cofferdam structure with high spatial rigidity is formed without a steel purlin.
The locking structure 3 is arranged between the steel box column 1 and the steel box section 2 and used for realizing the stable connection between the steel box column 1 and the steel box section 2 to form a closed cofferdam structure.
Specifically, as shown in fig. 4-6, the locking structure 3 includes steel box locking openings 13 respectively disposed at two ends of two layers of steel box column walls 12, and right-angled wall plate hook heads 23 respectively disposed at two ends of two layers of steel box section walls 22; the steel box fore shaft 13 of 1 side of steel box post can correspond the lock with the wallboard gib head 23 of 2 sides of steel box section is inserted and is closed to this forms two fore shaft structures between steel box post 1 and steel box section 2, and two fore shaft structures can conveniently connect steel box post 1 and steel box section 2 to also can conveniently dismantle steel box post 1 and steel box section 2 through the plug of two fore shaft structures, realize the dismantlement reuse of double-walled steel cofferdam.
Preferably, the steel box locking notch 13 is filled with waterproof materials, so as to achieve better water-stopping effect on the basis of the steel box column wall 12 and the steel box section wall 22.
The waterproof material can adopt but is not limited to a waterproof expansion rubber strip.
Reasonable gaps are reserved at all the butt joints of the double-locking-opening pluggable double-wall steel cofferdam so as to meet the requirements of plugging of necessary water-stop cloth and considering the existence of construction errors.
As a preferred scheme of this embodiment, for the soil body excavation supporting construction stability in the cofferdam is accomplished in the cooperation, still be provided with multichannel horizontal inner strut in the closed cofferdam, form the space supporting system between horizontal strut and steel box column 1 and the steel box segment 2, promoted the stability of structure greatly.
The construction method of the double-locking-opening pluggable double-wall steel cofferdam comprises the following steps:
firstly, according to field conditions, a steel box column 1 and a steel box segment 2 with preset lengths are manufactured, the steel box column 1 is formed by welding a steel box column wall 12 and internal channel steel, and the steel box column 1 is manufactured into a whole.
Through the accurate positioning technology, the corner column of the steel box column 1 at four corners is firstly inserted and punched, and the bottom of the steel box column 1 is provided with a cutting edge angle which can be conveniently inserted and punched. The accurate positioning technology is the key for ensuring the smooth operation of the next construction process.
And inserting and punching the side columns of the steel box columns 1 at the four sides according to the distance of 3 m.
After the inserting and beating construction of all the steel box columns 1 is completed, the positions of the steel box columns are retested, and the correct positions are determined.
And performing inserting and beating construction of the steel box segment 2. Before construction, a waterproof expansion adhesive tape is sleeved on the wall plate hook head 23, or water stop cloth is filled between the locking connection parts of the steel box sections 2 and the steel box columns 1, then symmetrical construction is sequentially carried out on opposite sides, after a standard section steel box consisting of the steel box columns and the steel box sections on two sides is inserted and beaten, construction of the next standard section steel box is carried out until all steel box construction is completed.
After the construction of the steel box sections 2 at the bottom ends is finished, the steel box sections 2 are continuously constructed upwards, and the upper steel box sections and the lower steel box sections 2 are also connected by adopting a locking structure 3.
And after the construction of the steel box column 1 and the steel box section 2 is completed, supporting the horizontal inner support frame, and completing the construction of all the supports in water according to the designed number.
Carrying out mud suction in water, and constructing corresponding inner supports; and (5) sucking the mud until the designed depth is reached, and then performing construction of underwater bottom sealing concrete.
And drawing out the water stored in the cofferdam to carry out the construction of the main structure in the cofferdam.
And according to the construction process, the horizontal inner support frame is dismantled layer by layer from bottom to top.
And after the construction of the main structure in the water is finished, removing the cofferdam.
And sequentially pulling out the steel box sections 2 from top to bottom in a reverse order, and finally pulling out the steel box column 1.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. The utility model provides a but double-locking mouth plug-in double-walled steel cofferdam which characterized in that: comprises a steel box column, a steel box segment and a locking structure; wherein the content of the first and second substances,
the steel box column comprises two layers of steel box column walls and at least one steel box column rib plate integrally arranged between the two layers of steel box column walls, and the steel box section comprises two layers of steel box section walls and at least one steel box section rib plate integrally arranged between the two layers of steel box section walls so as to form a double-wall steel structure;
the steel box column is provided with two matching ends, and the two steel box sections and the two matching ends are correspondingly locked and inserted through the locking structures one by one;
each matching end corresponds to two locking structures, and the two locking structures are respectively positioned at two side ends of the matching end in a one-to-one correspondence manner.
2. A double-locking-opening pluggable double-wall steel cofferdam as recited in claim 1, wherein said steel box columns comprise corner columns and side columns;
the steel box column walls of the corner columns are in a folded angle shape and are used for being arranged at four corners of the cofferdam;
and the steel box column walls of the side columns are straight and are used for being arranged on each edge of the cofferdam.
3. The double-locking-opening pluggable double-wall steel cofferdam of claim 1, wherein said locking structure comprises a steel box locking opening and a wall plate hook head;
the steel box locking openings are respectively arranged at two ends of the column wall of each layer of the steel box in a one-to-one correspondence manner;
the wall plate hook heads are respectively arranged at two ends of the wall of each layer of the steel box section in a one-to-one correspondence manner;
the steel box locking port can be correspondingly locked, connected and inserted with the wallboard hook head.
4. The double-locking-opening pluggable double-wall steel cofferdam of claim 1, wherein the steel box columns are of a double hollow square steel column structure;
the steel box column is provided with an extending direction, and the steel box column is provided with a first end and a second end along the extending direction; the first end of the steel box column is provided with a cutting edge structure;
the steel box column is provided with a layer of steel box column wall on two opposite sides between the second end and the first end.
5. The double-locking-opening pluggable double-wall steel cofferdam of claim 4, wherein channel steel is arranged between the inner and outer layers of hollow square steel every 3m in the extending direction;
the channel steel is obliquely arranged along an angle of 45 degrees.
6. The double-locking-opening pluggable double-wall steel cofferdam of claim 4, wherein at least two of said steel box section rib plates are uniformly arranged at intervals of 3 meters in the extension direction of the steel box column in said steel box section;
at least two steel box column floor, along its extending direction is evenly arranged at 3 meters intervals in the steel box column.
7. The double-locking-opening pluggable double-wall steel cofferdam of claim 6, wherein the bottom of the rib plate of the steel box section is provided with edge support angle steel between two layers of the steel box section walls for supporting.
8. The double-locking-opening pluggable double-wall steel cofferdam of claim 1, wherein the locking structure is internally provided with a waterproof material.
9. The double-locking-opening pluggable double-wall steel cofferdam of claim 8, wherein the waterproof material is waterproof expansion rubber strip or waterproof cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020906552.XU CN212835451U (en) | 2020-05-26 | 2020-05-26 | But two double-walled steel cofferdams of two fore shafts plug-in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020906552.XU CN212835451U (en) | 2020-05-26 | 2020-05-26 | But two double-walled steel cofferdams of two fore shafts plug-in |
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| Publication Number | Publication Date |
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| CN212835451U true CN212835451U (en) | 2021-03-30 |
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|---|---|---|---|
| CN202020906552.XU Active CN212835451U (en) | 2020-05-26 | 2020-05-26 | But two double-walled steel cofferdams of two fore shafts plug-in |
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| CN (1) | CN212835451U (en) |
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