CN116815803A - Modularized rapid-assembly steel sleeve cofferdam structure and construction method thereof - Google Patents

Abstract

The utility model belongs to the technical field of bridge infrastructure structures, and particularly relates to a modular rapid-assembly steel sleeve box cofferdam structure and a construction method thereof. The utility model provides a modular quickly assembled steel sleeve box cofferdam structure, which can be formed by arranging a modular concave-convex plate unit, an end angle connecting piece unit, an inner side supporting rod unit and a screw-connection piece on an assembled bottom plate unit, wherein the modular concave-convex plate unit comprises a bottom plate unit, a bottom plate unit and a bottom plate unit, wherein the bottom plate unit comprises a bottom plate, a bottom plate and a bottom plate, and the bottom plate unit comprises a bottom plate, a top plate and a bottom plate, and the bottom plate is provided with a bottom plate, a top plate and a bottom plate and a top plate respectively connected with the bottom plate through screws and bolts respectively: 1. the adjacent modular concave-convex plate units can be inserted and then screwed, so that the enough stability of the side plate structure is ensured; 2. and an end angle connecting piece unit and an inner side supporting rod unit are further reinforced between the side plates, so that the whole steel sleeve cofferdam is finally ensured to have enough enclosing supporting strength.

Description

Modularized rapid-assembly steel sleeve cofferdam structure and construction method thereof

Technical Field

The utility model belongs to the technical field of bridge infrastructure structures, and particularly relates to a modular rapid-assembly steel sleeve box cofferdam structure and a construction method thereof.

Background

The steel sleeve cofferdam refers to a temporary water-blocking structure, and has the functions of firstly enclosing and then pumping water when a pier or a bearing platform is constructed, so that a water-free construction space is finally formed. The structure of the conventional common steel sleeve cofferdam mainly comprises a bottom plate and side plates.

For example, chinese utility model patent publication No. CN206916758U, publication date 2018.01.23 discloses a steel casing cofferdam comprising: cross connecting piles, profile steel weir plates and supporting steel bars.

The steel sleeve cofferdam has the advantages of simple structure, convenience in construction and the like. But at the same time, at least the following 2 prominent disadvantages exist in the actual use process: 1. the section steel weir plate is a whole, so that the production difficulty is high, and the transportation is inconvenient; 2. the lack of necessary reinforcement structure between two adjacent shaped steel weirs finally makes the box profile stability of rectangle relatively poor.

Therefore, various block-type and assembled box cofferdams are developed later, which is similar to the modular rapid assembly mode. For example, chinese patent publication No. CN213062061U and publication No. 2021.04.27 discloses a sectional steel box cofferdam, which comprises a side plate, wherein the side plate comprises a plurality of transverse distribution beam i-beams and a vertical main beam, two ends of each transverse distribution beam i-beam are respectively provided with a groove splicing i-beam and a groove splicing steel groove, the groove splicing i-beams are connected with the groove splicing steel grooves in a sliding and meshing manner, the vertical main beam is provided with a distribution beam, the side plate is provided with a plurality of first channel steel, the first channel steel is internally meshed with the first channel steel, the side plate is distributed around a bored pile, and two ends of the side plate are connected through spiral steel pipe columns.

The segmented steel sleeve cofferdam has the advantage of 'zero integration', and ensures that side plates with relatively smaller specifications are convenient to produce and carry. However, the splicing structure is relatively simple, and the whole cofferdam side plate finally formed has the defects of relatively poor structural stability and insufficiently firm connection.

Therefore, in view of the above, a new steel sleeve cofferdam with an optimized assembly mode and relatively high stability of an assembly structure is urgently needed.

Disclosure of Invention

The utility model provides a modular quickly assembled steel sleeve box cofferdam structure, which can be formed by arranging a modular concave-convex plate unit, an end angle connecting piece unit, an inner side supporting rod unit and a screw-connection piece on an assembled bottom plate unit, wherein the modular concave-convex plate unit comprises a bottom plate unit, a bottom plate unit and a bottom plate unit, wherein the bottom plate unit comprises a bottom plate, a bottom plate and a bottom plate, and the bottom plate unit comprises a bottom plate, a top plate and a bottom plate, and the bottom plate is provided with a bottom plate, a top plate and a bottom plate and a top plate respectively connected with the bottom plate through screws and bolts respectively: 1. the adjacent modular concave-convex plate units can be inserted and then screwed, so that the enough stability of the side plate structure is ensured; 2. and an end angle connecting piece unit and an inner side supporting rod unit are further reinforced between the side plates, so that the whole steel sleeve cofferdam is finally ensured to have enough enclosing supporting strength.

In addition, the utility model also provides a construction method of the steel sleeve cofferdam structure, wherein one step in the method is to set and prefabricate the shape and the size of the modularized concave-convex plate unit, and finally, the smooth splicing of the side plates is ensured.

The utility model adopts the technical proposal that: the utility model provides a steel bushing box cofferdam structure that modulization was assembled fast, includes assembling the bottom plate unit, sets up assemble the bottom plate unit on being used for assembling the modulization concave-convex plate unit that forms the curb plate, set up two adjacent the terminal angle connecting piece unit on the curb plate, set up two adjacent inboard bracing piece unit on the curb plate, and set up on the modulization concave-convex plate unit, and be used for connecting adjacent the spiro union piece of modulization concave-convex plate unit or terminal angle connecting piece unit or inboard bracing piece unit.

The further preferable technical scheme is as follows: the spliced bottom plate unit comprises 2 rectangular plates, 2 side grooves which are arranged on the rectangular plates and used for forming bearing platform holes, and pile foundation holes arranged on the rectangular plates.

The further preferable technical scheme is as follows: the assembled bottom plate unit further comprises vertical bars which are arranged on the upper surfaces of the two rectangular plates in pairs, are L-shaped in cross section and are used for clamping and fixing the end corners of the two adjacent side plates, and upper holes which are arranged on the vertical bars at the end corners and are used for installing the screw-connection pieces.

The further preferable technical scheme is as follows: the modular concave-convex plate unit comprises a plate body, groove plates arranged on two adjacent side surfaces of the plate body, convex plates arranged on two other adjacent side surfaces of the plate body, and plate body holes arranged on the groove plates and the convex plates and used for installing the screw-connection pieces.

The further preferable technical scheme is as follows: the modular concave-convex plate unit further comprises an inner stiffening plate arranged on the plate body.

The further preferable technical scheme is as follows: the end corner connector unit comprises L-shaped insertion blocks which are arranged on two adjacent side plates and are used for clamping the groove plates, L-shaped groove blocks which are arranged on two adjacent side plates and are used for inserting the protruding plates, and upper block holes which are arranged on the L-shaped insertion blocks and the L-shaped groove blocks and are used for installing the screw connectors.

The further preferable technical scheme is as follows: the inner side support rod unit comprises 2 fixing rods respectively arranged on the inner side surfaces of the two adjacent side plates, and support rods arranged on the two fixing rods.

The further preferable technical scheme is as follows: the inner side support rod unit further comprises an end groove which is arranged on the fixing rod and the support rod and used for inserting and installing the inner side stiffening plate.

The further preferable technical scheme is as follows: the inner side support rod unit further comprises a countersink which is arranged on the fixing rod and used for installing the screw-on piece, and the countersink is provided with an arc-shaped straight groove which is used for penetrating through the screw-on piece on the inner side surface of the end socket.

The construction method of the modular quickly assembled steel box cofferdam structure comprises the steps of firstly setting and prefabricating the shape and the size of a modular concave-convex plate unit before assembly construction, setting the shape of the modular concave-convex plate unit to be square, setting the size of the modular concave-convex plate unit to be 3m, 2m and 1m of side length, or setting the shape of the modular concave-convex plate unit to be rectangular, and setting the size of the modular concave-convex plate unit to be 3m of width 1m, 2m of width 1m of length and 1m of width 1m of length.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of a modular attapulgite unit according to the present utility model.

Fig. 3 is a schematic diagram of the structure of the assembled floor unit according to the present utility model in a top view.

FIG. 4 is a schematic view of one method of using the screw of the present utility model.

Fig. 5 is a schematic view of the position and shape of an L-shaped insert block according to the present utility model.

FIG. 6 is a schematic view of the position and shape of the grooved L-shaped block according to the present utility model.

Fig. 7 is a schematic view showing 2 different methods of using the medial strut members of the present utility model in a top view.

Fig. 8 is a schematic structural view of the inner support rod unit according to the present utility model.

FIG. 9 is a schematic diagram of a method of using the header tank of the present utility model.

FIG. 10 is a schematic diagram of a method of using a counterbore of the present utility model.

In the figures, the meaning of each label is as follows:

bearing platform a;

the assembly bottom plate unit 1, the modularized concave-convex plate unit 2, the end corner connector unit 3, the inner side support rod unit 4 and the screw connector 5;

rectangular plate 101, side groove 102, pile foundation hole 103, vertical bar 104 at end corner, upper bar hole 105, plate 201, groove plate 202, protruding plate 203, plate hole 204, inner stiffening plate 205, L-shaped insert 301, L-shaped block 302 with groove, upper block hole 303, fixing bar 401, supporting bar 402, end groove 403, and countersink 404.

Detailed Description

The following description is of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model.

As shown in fig. 1-10, the modular quickly assembled steel box cofferdam structure comprises an assembled bottom plate unit 1, a modular concave-convex plate unit 2 arranged on the assembled bottom plate unit 1 and used for assembling side plates, an end angle connecting piece unit 3 arranged on two adjacent side plates, an inner side supporting rod unit 4 arranged on two adjacent side plates, and a screw-connection piece 5 arranged on the modular concave-convex plate unit 2 and used for connecting the adjacent modular concave-convex plate unit 2 or the end angle connecting piece unit 3 or the inner side supporting rod unit 4.

In this embodiment, the steel box cofferdam is rectangular in shape and comprises a bottom plate and four side plates, the bottom plate is an assembled bottom plate unit 1, and the side plates are composed of a plurality of modularized concave-convex plate units 2 which are different in size, mutually matched in size and all four sides in an inserted and screwed mode. Therefore, the steel sleeve cofferdam has the double advantages of 'zero integration' and enough stable structure.

Furthermore, the corner connector units 3 serve to further strengthen the connection strength between the adjacent side plates. In other words, the specific action parts of the corner connector units 3 include 4 positions, namely, 4 side plates which are spliced in a right angle corresponding to each other. Similarly, the inner support bar unit 4 is also provided to reinforce two adjacent side plates which are already at right angles.

Then a number of said screws 5 are provided, which have the following 3 different use scenarios:

1. part of the screw-connection pieces 5 are only used for screw-connecting and fixing two adjacent modular concave-convex plate units 2;

2. part of the screw-connection pieces 5 are used for simultaneously fixing 2 modular concave-convex plate units 2 and 1 end angle connector unit 3;

3. part of the screw 5 is used for simultaneously fixing 2 pieces of the modular concave-convex plate units 2 and 1 inner side support rod unit 4.

Finally, the splicing structure of the steel sleeve cofferdam is further reinforced.

The assembled base plate unit 1 comprises 2 rectangular plates 101, 2 side grooves 102 which are arranged on the rectangular plates 101 and used for forming bearing platform holes, and pile foundation holes 103 which are arranged on the rectangular plates 101.

In this embodiment, 2 side slots 102 are spliced together to form a rectangular slot to allow the passage of a bearing or pier, and the pile holes 103 also function similarly to allow the passage of pile foundations.

The assembled base plate unit 1 further comprises vertical bars 104 which are respectively arranged on the upper surfaces of the two rectangular plates 101, have L-shaped cross sections and are used for clamping and fixing the end corners of the two adjacent side plates, and upper bar holes 105 which are arranged on the vertical bars 104 at the end corners and are used for installing the screw-on parts 5.

In this embodiment, the screw connection 5 is a combination of a bolt and a nut.

In addition, the vertical bar 104 at the end corner is fixedly connected with the rectangular plate 101, and the right-angle outer side edge of the vertical bar is close to or directly coincides with the right-angle side edge of the rectangular plate. The vertical bars 104 at the end corners are used for simultaneously attaching the outer side surfaces of two adjacent side plates, and the rectangular frame formed by the four side plates is transversely limited front, back, left and right.

And then the vertical bars 104 at the end corners are connected with the side plates by combining the upper holes 105 and the screw-connection pieces 5, so that the assembled bottom plate unit 1 and the side plates are not separated up and down.

Correspondingly, at this time, the above-mentioned screw-coupling members 5 simultaneously coupling 2 blocks of the modular attapulgite units 2 and 1 corner connector units 3 are required to be further coupled with the vertical bars 104 at the corners.

Therefore, the plurality of screw-coupling members 5 may be bolts of various specifications having different lengths, or the bolt lengths may be uniformly set to be sufficiently large.

The modular attapulgite unit 2 comprises a plate body 201, groove plates 202 provided on two adjacent sides of the plate body 201, protrusion plates 203 provided on two other adjacent sides of the plate body 201, and plate body holes 204 provided on the groove plates 202 and the protrusion plates 203 for mounting the screw 5.

In this embodiment, the modular concept of the steel box cofferdam is embodied on the size and shape of the plate 201, and the size and shape of the steel box cofferdam can be properly adjusted in a certain range, so that the steel box cofferdam can be finally spliced to form a complete rectangular side plate.

In addition, in order to improve the splice strength between adjacent ones of the modular attapulgite units 2, two of the groove plates 202, or two of the projection plates 203 may alternatively be formed as an integral "L-shaped" plate.

Finally, the groove plate 202 may be a single "U" plate, or may be formed from 2 single plates to form a groove shape.

The modular attapulgite unit 2 further comprises inner stiffening plates 205 arranged on the plate body 201.

In this embodiment, the inner stiffening plate 205 is used to reinforce the plate 201 itself, so as to avoid the plate 201 from being easily bent, which does not affect the plugging and screwing effect of the groove plate 202 and the protruding plate 203.

The corner connector unit 3 includes L-shaped insertion blocks 301 provided on the adjacent two side plates and used for engaging the groove plates 202, grooved L-shaped blocks 302 provided on the adjacent two side plates and used for inserting the protruding plates 203, and block upper holes 303 provided on the L-shaped insertion blocks 301 and the grooved L-shaped blocks 302 and used for mounting the screw 5.

In this embodiment, a single L-shaped insert block 301 is inserted into all the splice floor units 1 on the sides of both side plates at the same time, as is the grooved L-shaped block 302. Therefore, the vertical bar 104, the L-shaped insertion block 301 and the grooved L-shaped block 302 at the end corners all require at least one row of bolt passing holes from top to bottom, i.e., the bar upper holes 105 and the block upper holes 303.

In addition, the width of the slotted L-shaped block 302 is larger than the width of the L-shaped insert block 301, which is: the latter is thickened first and then the two ends are grooved.

In addition, the grooved L-shaped block 302 may optionally be attached to the inner side of the vertical bar 104 at the end corner, and the L-shaped insert 301 does not have to be attached to the vertical bar 104 at the end corner again by expanding its middle.

The inside support rod unit 4 includes 2 fixing rods 401 respectively provided on the inner sides of the adjacent two side plates, and support rods 402 provided on the two fixing rods 401.

In this embodiment, the number of the inner support bar units 4 is 4 or 8, and the inner support bar units are evenly arranged inside the 4 end corners of the steel box cofferdam.

In addition, the fixing rods 401 and the supporting rods 402 are integrally formed, and the fixing rods 401 can be optionally arranged on the plate body 201 or the inner stiffening plate 205.

The inner support bar unit 4 further includes a tip groove 403 provided on the fixing bar 401 and the support bar 402 for inserting and mounting the inner stiffening plate 205.

In the present embodiment, the end groove 403 is partially provided on the support bar 402, so that it is ensured that the inner stiffening plate 205, even with a relatively wide width, can be completely engaged into the end groove 403, and the fixing bar 401 can simultaneously abut against the inner side surface of the plate 201, and the side plates can be reinforced.

The inner support rod unit 4 further comprises a counter bore 404 which is arranged on the fixing rod 401 and is used for installing the screw connector 5, and the counter bore 404 is provided with an arc straight groove which is used for penetrating through the screw connector 5 on the inner side surface of the end groove 403.

In this embodiment, the third installation mode of the inner support rod unit 4 is to install the fixing rod 401 at the splicing position of the spliced floor unit 1, that is, to reuse the screw 5.

The counter bore 404 is used for inserting bolts first, and finally, the fixing rod 401 is stably pressed on the groove plate 202 and the protruding plate 203.

Finally, the countersunk holes 404 extend across the head grooves 403 in a manner that ensures that even relatively thick bolts can be installed smoothly by properly breaking apart the two plates that have been "split" at the fixing bar 401.

The construction method of the modular quickly assembled steel box cofferdam structure comprises the steps of firstly setting and prefabricating the shape and the size of a modular concave-convex plate unit 2 before assembly construction, setting the shape of the modular concave-convex plate unit 2 to be square, and setting the size to be 3m, 2m and 1m of side length, or setting the shape of the modular concave-convex plate unit 2 to be rectangular, and setting the size to be 3m and 1m of width, 2m and 1m of length and 1m of width.

In this embodiment, in the above construction method, when designing the shape and size of the modular attapulgite units 2, it is necessary to ensure that an indefinite number of modular attapulgite units 2 can be spliced into a complete rectangular side plate.

The above shapes and dimensions refer to the board 201, and the groove board 202 and the protruding board 203 are still respectively installed on two adjacent sides of the board 201 no matter how the shapes and dimensions of the board 201 change, so that the board 201 is ensured not to change and not to affect the splicing effect when the board 201 is set in a modularized manner.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various modifications may be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model. These are all non-inventive modifications which are intended to be protected by the patent laws within the scope of the appended claims.

Claims (10)

1. A steel bushing box cofferdam structure of modular quick assembly, its characterized in that: the assembly bottom plate unit (1) is arranged on the assembly bottom plate unit (1) and used for assembling a modularized concave-convex plate unit (2) forming a side plate, end angle connecting piece units (3) arranged on two adjacent side plates, inner side supporting rod units (4) arranged on two adjacent side plates, and screw connectors (5) arranged on the modularized concave-convex plate unit (2) and used for connecting the adjacent modularized concave-convex plate unit (2) or the end angle connecting piece units (3) or the inner side supporting rod units (4).

2. The modular quickly assembled steel box cofferdam structure as set forth in claim 1, wherein: the spliced bottom plate unit (1) comprises 2 rectangular plates (101), 2 side grooves (102) which are formed in the rectangular plates (101) and used for forming bearing platform holes, and pile foundation holes (103) formed in the rectangular plates (101).

3. The modular quickly assembled steel box cofferdam structure as set forth in claim 2, wherein: the assembled bottom plate unit (1) further comprises vertical strips (104) which are arranged on the upper surfaces of the two rectangular plates (101) in a pair, are L-shaped in cross section and are used for clamping and fixing the end corners of the two adjacent side plates, and strip upper holes (105) which are arranged on the vertical strips (104) at the end corners and are used for installing the screw connectors (5).

4. A modular fast assembled steel casing cofferdam structure as claimed in claim 3, wherein: the modular concave-convex plate unit (2) comprises a plate body (201), groove plates (202) arranged on two adjacent side surfaces of the plate body (201), protruding plates (203) arranged on two other adjacent side surfaces of the plate body (201), and plate body holes (204) which are arranged on the groove plates (202) and the protruding plates (203) and are used for installing the screw-connection pieces (5).

5. The modular quickly assembled steel box cofferdam structure of claim 4, wherein: the modular attapulgite unit (2) further comprises an inner stiffening plate (205) arranged on the plate body (201).

6. The modular quickly assembled steel box cofferdam structure of claim 4, wherein: the corner connector unit (3) comprises L-shaped insertion blocks (301) arranged on two adjacent side plates and used for clamping the groove plates (202), L-shaped groove blocks (302) arranged on two adjacent side plates and used for inserting the protruding plates (203), and block upper holes (303) arranged on the L-shaped insertion blocks (301) and the L-shaped groove blocks (302) and used for installing the screw connectors (5).

7. The modular quickly assembled steel box cofferdam structure of claim 5, wherein: the inner support rod unit (4) comprises 2 fixing rods (401) respectively arranged on the inner sides of the two adjacent side plates, and support rods (402) arranged on the two fixing rods (401).

8. The modular quickly assembled steel box cofferdam structure of claim 7, wherein: the inner side support rod unit (4) further comprises end grooves (403) which are arranged on the fixing rods (401) and the support rods (402) and are used for inserting and installing the inner side stiffening plates (205).

9. The modular quickly assembled steel box cofferdam structure of claim 8, wherein: the inner side support rod unit (4) further comprises a countersunk hole (404) which is arranged on the fixing rod (401) and used for installing the screw-on piece (5), and the countersunk hole (404) is provided with an arc-shaped straight groove which is used for penetrating through the screw-on piece (5) on the inner side surface of the end groove (403).

10. A method for constructing a modular quickly assembled steel casing cofferdam structure as claimed in claim 1, which is characterized in that: before assembly construction, the steel sleeve cofferdam is firstly set and prefabricated for the shape and the size of the modular concave-convex plate unit (2), wherein the shape of the modular concave-convex plate unit (2) is square, the size is 3m, 2m and 1m of side length, or the shape of the modular concave-convex plate unit (2) is rectangular, and the size is 3m long and 1m wide, 2m long and 1m wide and 1m long and 1m wide.