CN212835454U

CN212835454U - River-blocking cofferdam

Info

Publication number: CN212835454U
Application number: CN202021185850.0U
Authority: CN
Inventors: 尹惠军; 何泽民; 杨才通
Original assignee: Shanghai River Construction Co ltd
Current assignee: Shanghai River Construction Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-03-30
Anticipated expiration: 2030-06-23

Abstract

The utility model relates to a river blocking cofferdam, it includes dyke heart, and dyke heart outer wall includes water-facing inclined plane, top surface and back of the body water inclined plane, and the concrete layer has all been laid to the outer wall of dyke heart fixedly, and the end is consolidated with the tip fixedly connected with of river course bottom surface butt on concrete layer, and in the reinforcing end inserted the river course bottom surface, the inside fixed inserting of dyke heart is equipped with braced frame, and braced frame's top and both sides all are fixed with concrete layer, the utility model discloses have the effect of improving cofferdam stability in order to guarantee its degree of safety.

Description

River-blocking cofferdam

Technical Field

The utility model belongs to the technical field of hydraulic engineering's technique and specifically relates to a river-blocking cofferdam is related to.

Background

The cofferdam is a temporary enclosure structure constructed for building permanent water conservancy facilities in the water conservancy project construction, has the function of preventing water and soil from entering the construction position of a building so as to drain water in the cofferdam, excavate a foundation pit and construct the building, is generally mainly used in the water conservancy project construction, is generally dismantled after being used up except being used as a part of a formal building, has the height higher than the highest water level which can appear in the construction period, is formed by filling earth and stone, is mostly used as an upstream and downstream transverse cofferdam, can fully utilize local materials, has strong adaptability to the foundation and is simple in construction process.

The existing Chinese patent with reference to publication number CN203113359U discloses an earth-rock cofferdam structure, which comprises a cofferdam filling body, wherein a seepage-proofing body and a vertical seepage-proofing wall are arranged inside the cofferdam filling body, the seepage-proofing body comprises an inclined part and a horizontal part, one end of the horizontal part is connected with the lower end of the inclined part, the vertical seepage-proofing wall is close to the water-facing side of the cofferdam filling body, the top end of the vertical seepage-proofing wall is connected with the other end of the horizontal part of the seepage-proofing body, and the seepage-proofing body and the vertical seepage-proofing wall together form a seepage-proofing structure for preventing water from permeating from the water-facing side to the back water side of the coffer; the structure can adopt the high-height earth-rock cofferdam for the construction of the large-flow river channel water conservancy and hydropower engineering of the deep and thick covering layer of the narrow river valley, and the scale of the diversion and water release building is reduced.

The above prior art solutions have the following drawbacks: the cofferdam is easy to collapse or have fractures when the river speed is accelerated or other accidental impacts happen, and the safety degree of the cofferdam is insufficient due to poor stability of the cofferdam.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a river-blocking cofferdam reaches the effect that improves cofferdam stability in order to guarantee its degree of safety.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the river blocking cofferdam comprises a dike core, wherein the outer wall of the dike core comprises a water-facing inclined plane, a top surface and a water-backing inclined plane, a concrete layer is fixedly laid on the outer wall of the dike core, the concrete layer is fixedly connected with a reinforcing end which is abutted against the bottom surface of a river channel, the reinforcing end is inserted into the bottom surface of the river channel, a supporting framework is fixedly inserted into the dike core, and the top and two sides of the supporting framework are fixed with the concrete layer.

Through adopting above-mentioned technical scheme, the setting on water-facing inclined plane and back of the body water inclined plane makes the focus of dyke heart lower, fixes concrete layer on dyke heart outer wall, can improve the steadiness of dyke heart greatly, and concrete layer self's intensity is enough to bear the river simultaneously and assaults, and the support skeleton is fixed inside the dyke heart and with concrete layer, and then has improved the steadiness between dyke heart and the concrete layer greatly for the stability of cofferdam improves greatly, and then has guaranteed the security of cofferdam.

The utility model discloses further set up to: the dike core comprises a metal gabion mesh layer and a clay layer fixed above the metal gabion mesh layer, and the metal gabion mesh layer is formed by filling stones and fine stone particles into the metal gabion mesh layer.

By adopting the technical scheme, the weight formed by combining the metal gabion mesh, the stones and the fine stone particles is far greater than the weight of the clay, so that the gravity center of the dike core is greatly reduced, and the safety and stability of the cofferdam are further improved.

The utility model discloses further set up to: and the corrosion-resistant layer is fixedly paved outside the concrete layer close to the water-facing inclined plane.

Through adopting above-mentioned technical scheme, the setting of corrosion-resistant layer has effectively prevented that the river from causing the impact corrosion to concrete layer for a long time, can effectively improve concrete layer's life and guarantee its self intensity, and then has guaranteed that the stability of cofferdam keeps well.

The utility model discloses further set up to: and an impact resistant layer is fixedly paved on the outer wall of the corrosion resistant layer.

Through adopting above-mentioned technical scheme, the shock-resistant layer is fixed outside corrosion-resistant layer, can prevent effectively that the river from leading to the fact the damage to corrosion-resistant layer's impact is great, and then has played the effect that reinforcing cofferdam shock resistance effect.

The utility model discloses further set up to: and a water absorbing layer is fixedly laid on the side wall of the concrete layer close to the backwater inclined plane.

Through adopting above-mentioned technical scheme, because the roof on concrete layer is higher than the highest water level that probably appears in the construction period, nevertheless when the river strikes the cofferdam, probably have the unrestrained face that flies to the cofferdam, and then the setting on the layer that absorbs water can effectively absorb the unrestrained, prevents effectively that the unrestrained flow from leading to the fact the construction inconveniently to the inside construction site.

The utility model discloses further set up to: one side of the dike core close to the back water inclined plane is fixedly inserted with a steel sheet pile, and the bottom end of the steel sheet pile is inserted into the bottom surface of the river channel.

Through adopting above-mentioned technical scheme, in the river course was inserted to the bottom of steel sheet pile, when guaranteeing self stability, can be further prevent effectively that the wave flower from flying to cross the layer top that absorbs water and getting into the construction place, and then guaranteed the normal clear of construction.

The utility model discloses further set up to: and a water retaining plate is vertically fixed at one end of the top of the concrete layer, which is close to the water-carrying inclined plane.

Through adopting above-mentioned technical scheme, the setting up of water-stop board can carry out the wave flower interception from the top of cofferdam, and then has prevented effectively that the wave flower from flying through in the cofferdam gets into the construction place.

The utility model discloses further set up to: the top of the concrete layer is arranged in a wavy manner, and the length direction of the waves is parallel to the length direction of the water retaining plate.

Through adopting above-mentioned technical scheme, wavy setting makes the river when assaulting on the cofferdam, can upwards move along the inclined plane that faces water of cofferdam, and wavy setting still has the effect of intercepting rivers many times when can heighten the height of concrete layer upper surface.

The utility model discloses further set up to: the top end of the supporting framework penetrates through the concrete layer and then is fixedly extended into the water retaining plate.

Through adopting above-mentioned technical scheme, the top of supporting framework stretches into water-stop board can and rather than fixed, can strengthen water-stop board's stability.

The utility model discloses further set up to: the bottom of the supporting framework extends downwards to be inserted into the bottom surface of the river channel.

Through adopting above-mentioned technical scheme, insert the overall stability that the braced skeleton in the river course can strengthen the cofferdam for the safety degree of cofferdam improves greatly.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the strength of the concrete layer is enough to bear river impact, and the supporting framework is arranged inside the dike core and fixed with the concrete layer, so that the stability between the dike core and the concrete layer is greatly improved, the stability of the cofferdam is greatly improved, and the safety of the cofferdam is further ensured;

2. the anti-impact layer is fixed outside the corrosion-resistant layer, so that the damage of the river to the corrosion-resistant layer due to large impact can be effectively prevented, and the effect of enhancing the anti-impact effect of the cofferdam is further achieved;

3. the supporting framework inserted into the river channel can strengthen the overall stability of the cofferdam, so that the safety degree of the cofferdam is greatly improved.

Drawings

Fig. 1 is a sectional view of the present embodiment.

In the figure, 1, a dyke core; 11. a metal gabion mesh layer; 12. a clay layer; 2. a water-facing slope; 21. a top surface; 22. a water-backed slope; 3. a concrete layer; 31. reinforcing the end; 32. a water-stop plate; 4. a corrosion-resistant layer; 5. an impact resistant layer; 6. a water-absorbing layer; 7. steel sheet piles; 8. and supporting the framework.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a river-blocking cofferdam, including dyke core 1, dyke core 1 outer wall includes water-facing inclined plane 2, top surface 21 and back of the body water inclined plane 22, dyke core 1 includes metal gabion stratum reticulare 11 and fixes clay layer 12 above metal gabion stratum reticulare 11, metal gabion stratum reticulare 11 is filled with stone and fine stone granule combination by metal gabion, concrete layer 3 has all been laid to dyke core 1 outer wall fixedly, concrete layer 3 and the tip of river course bottom surface butt all fixedly connected with the reinforcement end 31 of vertical setting, reinforcement end 31 and concrete layer 3 are integrated into one piece; because the weight of metal gabion stratum reticulare 11 is far greater than clay layer 12 for the focus of dyke core 1 is lower, and the intensity of concrete layer 3 self is enough to bear the river and assault simultaneously, and will dyke core 1 parcel including improving cofferdam intensity, when consolidating end 31 and concrete layer 3 and fixing, can also fix with the river course bottom surface, and then make the stability of cofferdam improve greatly, guaranteed the security of cofferdam.

As shown in fig. 1, a corrosion-resistant layer 4 is fixedly laid on a side wall of the concrete layer 3 close to the water-facing inclined plane 2, in this embodiment, the corrosion-resistant layer 4 is made of polytetrafluoroethylene, an impact-resistant layer 5 is fixedly laid on an outer wall of the corrosion-resistant layer 4, and in this embodiment, the impact-resistant layer 5 is composed of a plurality of twisted queen character blocks; the setting of corrosion-resistant layer 4 has prevented effectively that the river from contacting with concrete layer 3 for a long time, causes the river to make concrete layer 3's intensity reduce to the corruption of concrete, and shock resistance layer 5's setting can be through the impact force that weakens the river, and then can play the guard action to corrosion-resistant layer 4 and concrete layer 3.

As shown in fig. 1, concrete layer 3 is close to the fixed layer 6 that absorbs water of having laid of lateral wall on back water inclined plane 22, layer 6 that absorbs water in this embodiment is laid for the inflation bag that absorbs water and forms, the inflation can be carried out after the inflation bag absorbs water, and then can play the guard action to the cofferdam, one side that dyke heart 1 is close to back water inclined plane 22 is vertical to be fixed with steel sheet pile 7, steel sheet pile 7 is Larsen steel sheet pile 7 in this embodiment, in the vertical river course bottom that inserts of steel sheet pile 7, can further prevent to fly through the wave flower that absorbs water layer 6 and get into the construction site.

As shown in fig. 1, a water retaining plate 32 is vertically fixed at one end of the top wall of the concrete layer 3 close to the water-back inclined plane 22, the top wall of the concrete layer 3 is arranged in a wavy manner, and the length direction of the wave is parallel to the length direction of the water retaining plate 32; the arrangement of the water retaining plate 32 can effectively prevent spray from flying from the top of the concrete layer 3 to enter a construction site, the wavy arrangement can prevent the spray with smaller impact force from hitting the water retaining plate 32, the supporting framework 8 is fixed inside the dike core 1, the periphery and the top of the supporting framework 8 are fixed with the inside of the concrete layer 3, the top end of part of the supporting framework 8 penetrates through the concrete layer 3 and then extends into the water retaining plate 32 for fixing, and the bottom end of the supporting framework 8 is inserted into the bottom surface of a river channel;

the implementation principle of the embodiment is as follows: the river firstly impacts the impact-resistant layer 5, if spray-coated with spray, the lower speed spray is stopped by the top wall of the wavy concrete layer 3 and the water blocking plate 32, the spray exceeding the water blocking plate 32 falls onto the water absorbing layer 6 to be absorbed, and the spray flying over the water absorbing layer 6 is stopped by the steel sheet pile 7, so that river water can be effectively prevented from entering the construction site; support frame 8 is fixed with concrete layer 3 to support frame 8 top and bottom insert in water stop 32 and the river course bottom respectively, metal gabion stratum reticulare 11 are fixed in the bottom of dyke heart 1, and clay layer 12 is fixed at the top of dyke heart 1, the focus of greatly reduced cofferdam, make the stability of cofferdam improve greatly, and then guaranteed the security of cofferdam.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A river-damming cofferdam comprising a core (1) characterized by: the river channel embankment structure is characterized in that the outer wall of the embankment core (1) comprises a water-facing inclined surface (2), a top surface (21) and a water-backing inclined surface (22), a concrete layer (3) is fixedly paved on the outer wall of the embankment core (1), the concrete layer (3) is fixedly connected with a reinforcing end (31) abutted to the bottom surface of a river channel, the reinforcing end (31) is inserted into the bottom surface of the river channel, a supporting framework (8) is fixedly inserted into the interior of the embankment core (1), and the top and two sides of the supporting framework (8) are fixed with the concrete.

2. A river cofferdam according to claim 1 wherein: the dike core (1) comprises a metal gabion mesh layer (11) and an clay layer (12) fixed above the metal gabion mesh layer (11), and the metal gabion mesh layer (11) is formed by filling stones and fine stone particles in the metal gabion mesh.

3. A river cofferdam according to claim 1 wherein: and a corrosion-resistant layer (4) is fixedly laid outside the concrete layer (3) close to the water-facing inclined plane (2).

4. A river cofferdam according to claim 3 wherein: and an impact resistant layer (5) is fixedly paved on the outer wall of the corrosion resistant layer (4).

5. A river cofferdam according to claim 1 wherein: and a water absorbing layer (6) is fixedly laid on the side wall of the concrete layer (3) close to the backwater inclined plane (22).

6. A river cofferdam according to claim 5 wherein: one side of the dike core (1) close to the water-back inclined plane (22) is fixedly inserted with a steel sheet pile (7), and the bottom end of the steel sheet pile (7) is inserted into the bottom surface of the river channel.

7. A river cofferdam according to claim 1 wherein: and a water retaining plate (32) is vertically fixed at one end of the top of the concrete layer (3) close to the backwater inclined plane (22).

8. A river cofferdam according to claim 7 wherein: the top of the concrete layer (3) is arranged in a wavy manner, and the length direction of the waves is parallel to the length direction of the water retaining plate (32).

9. A river cofferdam according to claim 7 wherein: the top end of the supporting framework (8) penetrates through the concrete layer (3) and then is fixed and extends into the water retaining plate (32).

10. A river cofferdam according to claim 1 wherein: the bottoms of the supporting frameworks (8) extend downwards to be inserted into the bottom surface of the river channel.