CN218508464U

CN218508464U - Cofferdam structure for protecting underground structures

Info

Publication number: CN218508464U
Application number: CN202222196877.5U
Authority: CN
Inventors: 唐善培; 向斌; 李伟
Original assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Current assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-02-21
Anticipated expiration: 2032-08-18

Abstract

The utility model provides a cofferdam structure for protecting underground structures, including set up in the bored concrete pile of underground structures both sides, set up in the bailey piece beam structure on bored concrete pile top, set up in the sand bag weir body that fills on bailey piece beam structure top, bailey piece beam structure include I-steel beam layer, set up in bailey piece beam layer of I-steel beam layer top, set up in the channel-section steel beam layer of bailey piece beam layer top, set up in the steel sheet that bears of channel-section steel beam layer top. The structure can directly construct the cofferdam on the current underground structure, not only can meet the construction requirements of other projects to be constructed, but also does not need to move and change the current underground structure and influence the normal use of the current structure. Therefore, the construction influence range is small, the construction period is relatively short, the manufacturing cost is relatively low, and the purposes of shortening the construction period and saving the manufacturing cost are achieved.

Description

Cofferdam structure for protecting underground structures

Technical Field

The utility model belongs to the technical field of hydraulic engineering, concretely relates to cofferdam structure for protecting underground structures.

Background

In urban municipal construction, municipal pipeline structures such as water supply pipes, sewage pipes, gas pipes and the like often penetrate through the seabed, the lake bottom or the river bottom, the burial depth is large generally, and when cofferdams are required to be constructed in other projects in the later period, the cofferdams are crossed with underground structures, the underground structures need to be protected, and the underground structures are prevented from being damaged due to overload of additional loads on the tops.

The structure penetrating through the seabed, the lake bottom or the river bottom is generally large in buried depth, the load on the top of the structure is large, and the additional load which can be added on the top of the structure is limited, for example, the load of a cofferdam is directly added on the upper part of the structure, so that the bearing limit of the structure is exceeded, and the structure is damaged. In the prior art, for constructing a cofferdam structure on a current underground structure, the current structure is generally moved and changed, a structure route needs to be re-planned for reconstruction, extra engineering content is added, and investment is increased and the construction period is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art exists, the utility model provides a cofferdam structure for protecting underground structures can directly be under construction the cofferdam on current situation underground structures, both can satisfy the construction needs of other projects, need not move again and change current situation structures, influence the normal use of current situation structures. Therefore, the construction influence range is small, the construction period is relatively short, the manufacturing cost is relatively low, and the purposes of shortening the construction period and saving the manufacturing cost are achieved.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a cofferdam structure for protecting underground structures, including set up in the bored concrete pile of underground structures both sides, set up in the bailey piece beam structure on bored concrete pile top, set up in the sand bag weir body that fills on bailey piece beam structure top, bailey piece beam structure include I-steel beam layer, set up in bailey piece beam layer of I-steel beam layer top, set up in the channel-section steel beam layer of bailey piece beam layer top, set up in the steel sheet that bears of channel-section steel beam layer top.

Preferably, the I-shaped steel beam layer is formed by splicing a plurality of I-shaped steel beams which are arranged in parallel.

Preferably, the channel steel beam layer comprises a plurality of U-shaped channel steel beams.

Preferably, the channel steel beam layer comprises a plurality of channel steel beams which are uniformly arranged at intervals.

Preferably, the filled sand bag weir body comprises a lower layer weir body and an upper layer weir body, and the section of the upper layer weir body is of an isosceles trapezoid structure.

Preferably, the upper weir bottom width is less than the lower weir top width.

Preferably, the bailey piece beam layer includes a plurality of parallel bailey piece beams, and the portions of the bailey piece beams in the bailey piece beam layer are distributed in a manner that the middle portions are closer to the two sides.

Preferably, the cofferdam structure further comprises a high-pressure jet grouting water stop pile.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a pair of cofferdam structure for protecting underground structures adopts integrated configuration such as bored concrete pile, girder steel, bailey piece roof beam, channel-section steel, bearing steel sheet to bear the weight of the upper portion cofferdam body, wherein except that the bored concrete pile all can adopt the steel construction, can make the finished product ashore, and the installation is directly lifted by crane to the scene, convenient construction. The structure does not need to move and change the existing underground structure, directly constructs the cofferdam body, and avoids a series of problems of new route planning, investment and the like caused by newly constructed structures.

2. The utility model provides a pair of a cofferdam structure for protecting underground structures, this structure is the structure that the on-the-spot concatenation equipment formed, and convenient and fast is demolishd to this structure when the cofferdam is demolishd.

Drawings

Fig. 1 is a schematic sectional view of a cofferdam structure for protecting an underground structure according to an embodiment of the present invention;

fig. 2 is a schematic side view of a cofferdam structure for protecting an underground structure according to an embodiment of the present invention.

In the drawings, the reference numbers indicate the following list of parts:

1. filling piles; 2. a Bailey sheet beam structure; 3. filling a sand bag weir body; 4. high-pressure jet grouting water-stopping piles; 10. underwater structures; 201. an I-beam layer; 202. a Bailey sheet beam layer; 203. a channel steel beam layer; 204. a load bearing steel plate; 301. a lower weir body; 302. an upper weir body; 5. a sea bed surface.

Detailed Description

The present invention is further described in detail below with reference to specific embodiments so that those skilled in the art can more clearly understand the present invention.

It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as if they were connected either fixedly or removably, or as integrally formed structures. To those of ordinary skill in the art, the specific meaning of such terms in this patent may be understood as appropriate.

As shown in fig. 1-2, the embodiment provides a cofferdam structure for protecting an underground structure, including a cast-in-place pile 1 disposed at two sides of an underground structure 10, a beret beam structure 2 disposed at a top end of the cast-in-place pile 1, and a sand bag filling weir body 3 disposed at a top end of the beret beam structure 2, where the beret beam structure 2 includes an i-beam layer 201, a beret beam layer 202 disposed above the i-beam layer 201, a channel beam layer 203 disposed above the beret beam layer 202, and a bearing steel plate 204 disposed above the channel beam layer 203.

Specifically, underground structure 10 can be underground structures such as current situation pipeline, bored concrete pile 1 is followed underground structure 10 both sides length direction evenly spaced arrangement has a plurality ofly, bailey piece girder construction 2 is followed underground structure 10 length direction arranges, 2 bottoms of bailey piece girder construction can be slightly less than sea bed face 5, and one is convenient for installation and construction, and two is guaranteed bailey piece girder construction bottom and sea bed face 5 in close contact with. Fill sand bag weir 3 arrange in 2 tops of bailey piece girder construction, 3 bottom both sides of filling sand bag weir can be wider in bailey piece girder construction 2, the part that the weir surpassed bailey piece girder construction is directly laid on sea bed surface 5. The lower end of the cast-in-place pile 1 which plays a role of vertical supporting goes deep into a rock mass, the upper end of the cast-in-place pile is connected with the Bailey truss structure 2, the load of the upper filling sand bag weir body 3 can be directly transmitted to a pile end bearing layer, and the problem of vertical bearing of the upper weir body under stress is solved. The Bailey sheet beam structure 2 can span the current underground structure, is effectively connected with the top end of the cast-in-place pile 1, effectively transmits the load of the upper weir body to the cast-in-place pile 1, and solves the problem that the load of the upper weir body spans the current underground structure, and the top of the current structure directly bears pressure. Moreover, the bearing steel plate 204 can connect the bailey beams into a whole, so that the load of the upper weir body is uniformly distributed to the bailey beams, and the uniform stress of the weir body is ensured.

In this embodiment, as shown in fig. 2, the i-beam layer 201 is formed by splicing a plurality of i-beams arranged in parallel. Adjacent two the upper flange of I-shaped steel beam is contradicted and is met, adjacent two the lower flange of I-shaped steel beam is contradicted and is met, just the lower flange of I-shaped steel beam with 1 top of bored concrete pile is connected, the upper flange of I-shaped steel beam with beiLei slice beam layer 202 bottom is connected, plays the effect of support, simple structure, simple to operate.

The channel steel beam layer 203 comprises a plurality of channel steel beams which are uniformly arranged at intervals. The channel beam opening is down, the channel beam bottom with bailey piece roof beam layer 202 top is connected, the channel beam top with bear the weight of the steel sheet 204 and be connected, simple structure, simple to operate.

The filling sand bag weir body 3 comprises a lower layer weir body 301 and an upper layer weir body 302, and the section of the upper layer weir body 302 can be in an isosceles trapezoid structure. The upper weir 302 bottom width may be less than the lower weir 301 top width. The lower weir body 301 section can also be an isosceles trapezoid structure, that is, the whole filling sand bag weir body 3 is a large isosceles trapezoid-like structure, so that the load is distributed to the whole beret beam structure 2, and the local load is prevented from being overlarge. In order to guarantee that the trapezoidal large-section weir body slope body is stable, the middle part of the lower-layer weir body 301 is arranged above the Bailey sheet beam structure 2, the two sides of the bottom of the lower-layer weir body 301 can exceed the two sides of the Bailey sheet beam structure 2, and the exceeding part is laid on the sea bed surface 5.

Because the middle part of the filled sand bag weir body 3 has a large load, in this embodiment, the bailey piece beam layer 202 includes a plurality of bailey piece beams arranged in parallel, and the distribution state of the bailey piece beams in the bailey piece beam layer 202 is dense at the middle part and at two sides. With the arrangement, the supporting force of the middle part of the Bailey beam layer 202 is stronger, and the structure is more stable.

In this embodiment, the cofferdam structure further includes a high-pressure jet grouting water stop pile 4. The high-pressure rotary spraying water-stopping piles 4 vertically penetrate through the middle of the cofferdam body to form a water-stopping wall and stop the high water level outside the cofferdam, so that the cofferdam body can form the working condition that the outside of the cofferdam body is filled with water and the inside of the cofferdam body is not filled with water.

The cofferdam structure for protecting underground structures provided by the embodiment has the following construction steps:

(1) the cast-in-place pile 1 is constructed, namely (2) the pile top is provided with spliced I-shaped steel beams 201, namely (3) the Beilei sheet 202, namely (4) the channel steel beam 203, namely (5) the bearing steel plate 204, and (6) the water-stopping pile 4 is constructed.

In summary, compared with the method of constructing the cofferdam after the underground structure is moved and modified in the prior art, the cofferdam structure for protecting the underground structure provided by the embodiment has the advantages that the existing structure does not need to be moved and modified, the steel structure is relatively easy to assemble and disassemble on site, the route is prevented from being re-planned, the construction influence range is small, and the construction cost is saved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The cofferdam structure for protecting the underground structure is characterized by comprising cast-in-place piles (1) arranged on two sides of the underground structure (10), a Bailey sheet beam structure (2) arranged on the top end of the cast-in-place piles (1), and a filled sand bag weir body (3) arranged on the top end of the Bailey sheet beam structure (2), wherein the Bailey sheet beam structure (2) comprises an I-shaped steel beam layer (201), a Bailey sheet beam layer (202) arranged above the I-shaped steel beam layer (201), a channel steel beam layer (203) arranged above the Bailey sheet beam layer (202), and a bearing steel plate (204) arranged above the channel steel beam layer (203).

2. Cofferdam structure for protection of underground structures according to claim 1, characterized in that said i-beam layer (201) is composed of a number of spliced i-beams arranged in parallel.

3. Cofferdam structure for protection of underground structures according to claim 1, characterized in that said channel beam layer (203) comprises a plurality of U-channel steel beams.

4. Cofferdam structure for protecting underground structures according to claim 2, characterized in that said channel beam layer (203) comprises a plurality of evenly spaced channel steel beams.

5. Cofferdam structure for the protection of underground structures according to claim 1, characterized in that said sandbag weir (3) comprises a lower weir (301), an upper weir (302), said upper weir (302) being of isosceles trapezoidal configuration in section.

6. Cofferdam structure for protecting underground structures according to claim 5, characterized in that the width of the bottom of said upper weir (302) is smaller than the width of the top of said lower weir (301).

7. The cofferdam structure for protecting an underground structure of claim 6, wherein the Bailey sheet girder layer (202) comprises a plurality of Bailey sheet girders arranged in parallel, and the distribution of the Bailey sheet girders in the Bailey sheet girder layer (202) is dense at the middle part and at the two sides.

8. Cofferdam structure for the protection of underground structures according to claim 1, characterized in that it further comprises high pressure jet grouting water piles (4).