Buckle type vertical seam connecting structure of concrete diaphragm wall and wave wall

Abstract

The invention belongs to the technical field of engineering structures, and particularly relates to a buckle type vertical seam connecting structure of a concrete anti-seepage wall and a wave wall, which comprises the concrete anti-seepage wall, the wave wall and a buckle type base arranged between the concrete anti-seepage wall and the wave wall. The invention provides a buckle type vertical seam connecting structure of a concrete diaphragm wall and a wave wall. The bottom of a buckle type base is connected with the concrete diaphragm wall; the top of the buckle type base is located at the tail end of the wave wall bottom plate, the vertical seam is sealed through water stopping, and the anti-seepage reliability is high; the settlement amount of the wave wall is reserved at the neck of the base, uneven settlement of the dam crest is avoided, and deformation coordination of the wave wall is guaranteed; the edges of the two sides of the base are slopes, and the dam body filling quality is guaranteed; the construction technology is mature; the anti-seepage system of the wave wall and the concrete anti-seepage wall can be effectively sealed, the water retaining effect of the wave wall is fully utilized, and engineering investment is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering structures, and in particular relates to a buckle-type vertical seam connection structure of a concrete anti-seepage wall and a wave-breaking wall. Background Art

[0002] The local material dam has low requirements for geological conditions and can be made of local materials. It is the most commonly used in China. In areas where clay materials are scarce and the overburden is deep, the asphalt concrete core wall dam is a conventional dam type. The dam foundation anti-seepage type generally adopts concrete anti-seepage wall connected to bedrock curtain grouting, and the asphalt concrete core wall is connected to the dam foundation concrete anti-seepage wall through the core wall base.

[0003] In general, the bank slope dam section has been excavated to the bedrock, and there is no need to build a concrete anti-seepage wall. The asphalt concrete core wall is directly connected to the base curtain grouting. At the dam head section, the concrete expanded base plug is connected to the bank slope curtain grouting to achieve the bank slope dam section foundation anti-seepage. In the gentle river valley section with a deep overburden, the bank slope dam section still cannot be excavated to the bedrock, and the foundation still needs a concrete anti-seepage wall for anti-seepage. In this case, the traditional practice is generally to raise the concrete anti-seepage wall to the dam top elevation, or insert the top of the concrete anti-seepage wall into the wave wall bottom plate to form an anti-seepage system.

[0004] These two commonly used types of connection between concrete anti-seepage walls and wave-breaking walls have their own limitations. The method of raising the concrete anti-seepage wall to the dam crest elevation has limited application conditions. It is not applicable to situations where the dam crest elevation is not high enough and needs to be combined with a wave-breaking wall for water retention. This is because the concrete anti-seepage wall and the wave-breaking wall cannot be effectively connected, making the anti-seepage system not closed and not meeting the requirements of the specification. In order to make the dam crest elevation meet the wave-proof requirements, the dam body will be raised, which will increase the dam engineering workload and worsen the economic efficiency. At the same time, the top of the concrete anti-seepage wall will undergo a large displacement after water storage, resulting in a gap in the anti-seepage system. The dam crest is a rockfill body except for the concrete anti-seepage wall, which has a relatively large rigidity. After long-term operation, the dam crest road surface is prone to uneven subsidence. The type in which the top of the concrete anti-seepage wall is inserted into the wave-breaking wall bottom plate can avoid the shortcomings of the former, but the anti-seepage axis often cannot be located exactly within the range of the wave-breaking wall bottom plate, especially for earth-rock dams with a wider dam top or earth-rock dams that need to be raised and thickened. The dam axis is far away from the wave-breaking wall. In order to connect the wave-breaking wall, the wave-breaking wall bottom plate needs to be lengthened; at the same time, the bottom of the concrete anti-seepage wall is built on rock, and the wave-breaking wall foundation is mostly rockfill filled by the dam body. The stiffness of the two is quite different, and the wave-breaking wall has the problem of uneven settlement. When the covering layer is thick, the deformation of the top of the wave-breaking wall will be larger.

[0005] Therefore, in view of the above-mentioned limitations of the current connection type between concrete cut-off wall and wave-breaking wall, it is very necessary to study and explore a new connection type that is more reliable, more economical and can adapt to uneven settlement. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned problems existing in traditional technologies and to provide a snap-on vertical seam connection structure for a concrete anti-seepage wall and a wave-breaking wall, which has the advantages of strong ability to adapt to uneven settlement, reliable anti-seepage connection, simple construction and wide application range.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a buckle type vertical seam connection structure of a concrete anti-seepage wall and a wave-breaking wall, comprising a concrete anti-seepage wall, a wave-breaking wall and a buckle type base arranged therebetween.

[0009] The bottom of the snap-on base is connected to the concrete anti-seepage wall;

[0010] The top of the snap-on base is located at the end of the wave-breaking wall bottom plate, and the vertical seams are sealed with water stops;

[0011] The neck of the snap-on base is reserved to ensure that uneven settlement does not occur on the dam top and that the deformation of the wave-breaking wall is coordinated with the settlement.

[0012] Furthermore, in the above-mentioned snap-in type vertical seam connection structure of the concrete anti-seepage wall and the wave-breaking wall, the snap-in type base is a cast-in-place concrete base, and the surface of the concrete anti-seepage wall is roughened before casting the base, and the embedded dowel bars are bent and extended into the base.

[0013] Furthermore, in the above-mentioned snap-in type vertical seam connection structure of the concrete anti-seepage wall and the wave-breaking wall, the bottom of the snap-in type base is connected to the concrete anti-seepage wall by dowel bars, and has good integrity; the two side edges of the snap-in type base are sloped to ensure the quality of dam body filling.

[0014] Furthermore, in the above-mentioned snap-on vertical seam connection structure between the concrete anti-seepage wall and the wave-breaking wall, the overcast section of the concrete anti-seepage wall is chiseled out, the reserved steel bars are cleaned and bent to an anchoring angle, and the wall top connection section is roughened.

[0015] Furthermore, in the above-mentioned snap-on vertical seam connection structure between the concrete anti-seepage wall and the wave-breaking wall, the waterstop is selected from copper waterstop or rubber waterstop according to the project scale and deformation calculation results.

[0016] Furthermore, in the above-mentioned snap-on vertical seam connection structure between the concrete anti-seepage wall and the wave-breaking wall, when the wave-breaking wall is far away from the anti-seepage axis, the wave-breaking wall and the concrete anti-seepage wall are connected by a connecting plate, and multiple connecting plates can be locally arranged.

[0017] Furthermore, in the above-mentioned buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall, the settlement amount is determined by the following formula:

[0018]

[0019] Where: S is the final settlement of the dam body or dam foundation; P i is the vertical stress of the calculated soil layer caused by the dam body load, kPa; E i is the deformation modulus of the i-th calculated soil layer, kPa; h i is the thickness of the i-th soil layer, m.

[0020] Furthermore, in the above-mentioned buckle-type vertical seam connection structure of the concrete anti-seepage wall and the wave-breaking wall, the construction method thereof comprises the following steps:

[0021] S1. Remove the overcast section of the poured concrete anti-seepage wall, chisel out the embedded connecting bars, bend them to the anchoring angle and clean them; roughen the surface within the interface between the top of the concrete anti-seepage wall and the buckle-type base casting;

[0022] S2. Snap-on base arrangement: To avoid the base restricting the overall deformation of the wave-breaking wall, a suitable reserved settlement space at the base neck is planned according to the characteristics of the dam body and dam foundation, and the base shape is determined;

[0023] S3. For the steel bar binding, formwork, water stop erection, concrete pouring and curing of the clip-on base, the longitudinal joints of the base should be staggered with the joints of the concrete anti-seepage wall groove section;

[0024] S4, dam filling, wave-breaking wall reinforcement binding, formwork, water stop erection, concrete construction; when the anti-seepage axis is far away from the wave-breaking wall, the connecting plate reinforcement, water stop and concrete are constructed simultaneously;

[0025] S5. Dam top filling and road surface construction.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention provides a snap-on vertical seam connection structure of a concrete anti-seepage wall and a wave-breaking wall, wherein the bottom of the connection base is snap-on connected to the top of the concrete anti-seepage wall, and the top of the base is connected to the end of the bottom plate of the wave-breaking wall by vertical seams and water stops, so that the anti-seepage reliability is high; the neck of the base reserves the settlement of the wave-breaking wall to avoid uneven settlement of the dam top and ensure the coordinated deformation of the wave-breaking wall; the edges on both sides of the base are slopes to ensure the filling quality of the dam body; the construction technology is relatively mature; the anti-seepage system of the wave-breaking wall and the concrete anti-seepage wall can be effectively closed, the water retaining effect of the wave-breaking wall is fully utilized, and the project investment is saved.

[0028] 2. The present invention solves many limitations of traditional connection methods: the method of raising the concrete anti-seepage wall to the dam top cannot effectively connect with the wave-breaking wall, making the anti-seepage system not closed. At the same time, raising the dam body will increase investment, and there will be uneven settlement on the dam top road surface. The top of the concrete anti-seepage wall is inserted into the bottom plate of the wave-breaking wall. It is suitable for the situation where the anti-seepage axis is within the range of the bottom plate of the wave-breaking wall. The bottom of the concrete anti-seepage wall is built on rock, and the foundation of the wave-breaking wall is the dam body filling material. The stiffness of the two is quite different, and the wave-breaking wall has the problem of large deformation of the top of the wall.

[0029] 3. The present invention has a simple structure, convenient construction and a wide range of applications. It is particularly suitable for the connection of concrete anti-seepage walls and wave-breaking walls in wide and gentle river valley slope sections with thick covering layers and for the treatment of dam body leakage using concrete anti-seepage walls in existing earth-rock dams. It has a good application prospect.

[0030] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a schematic diagram of the longitudinal section arrangement of the snap-on vertical seam connection structure in the first embodiment;

[0033] Figure 2 It is a schematic diagram of the cross-sectional arrangement of the buckle-type vertical seam connection structure of the present invention in the first embodiment;

[0034] Figure 3 It is a schematic diagram of the cross-sectional arrangement of the snap-on vertical seam connection structure in the second embodiment;

[0035] In the accompanying drawings, the reference numerals of the various components are as follows:

[0036] 01-concrete anti-seepage wall, 02-reserved dowel bars, 03-snap-on base, 04, 05, 06, 07-waterstop, 08-connecting plate, 09-dam body, 10-wave-breaking wall. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] This embodiment provides a buckle-type vertical seam connection structure of a concrete anti-seepage wall and a wave-breaking wall, which is mainly composed of a concrete anti-seepage wall 01, a reserved dowel bar 02, a buckle-type base 03, a water stop (04, 05), a connecting plate 08, a dam body 09, and a wave-breaking wall 10. The buckle-type base 03 is arranged between the concrete anti-seepage wall 01 and the wave-breaking wall 10, and the bottom of the buckle-type base 03 is connected to the concrete anti-seepage wall 01; the top of the buckle-type base 03 is located at the end of the bottom plate of the wave-breaking wall 10, and the vertical seam is closed by the water stop (04, 05). The neck of the buckle-type base 03 is reserved to ensure that there is no uneven settlement on the dam top and to ensure the settlement amount of deformation coordination of the wave-breaking wall 10.

[0040] In this embodiment, the snap-on base 03 is a cast-in-place concrete base. Before casting the base, the surface of the concrete anti-seepage wall 01 is roughened, and the embedded reinforcing bars are bent and extended into the base.

[0041] In this embodiment, the bottom of the snap-on base 03 is connected to the concrete anti-seepage wall 01 through inserted reinforcement, and has good integrity; the edges on both sides of the snap-on base 03 are sloped to ensure the filling quality of the dam body 09.

[0042] In this embodiment, the overcast section of the concrete anti-seepage wall 01 is chiseled out, the reserved steel bars are cleaned and bent to the anchoring angle, and the wall top connection section is roughened.

[0043] In this embodiment, the waterstop (04, 05) is selected from copper waterstop or rubber waterstop according to the project scale and deformation calculation results.

[0044] In this embodiment, the wave-breaking wall 10 is relatively close to the anti-seepage axis.

[0045] In this embodiment, the construction method includes the following steps:

[0046] S1. Remove the overcast section of the poured concrete anti-seepage wall, chisel out the embedded connecting bars, bend them to the anchoring angle and clean them; roughen the surface within the interface between the top of the concrete anti-seepage wall and the buckle-type base casting;

[0047] S2. Snap-on base arrangement. To avoid the base restricting the overall deformation of the wave-breaking wall, a suitable reserved settlement space is planned for the base neck according to the characteristics of the dam body and dam foundation, and the base shape is determined; the settlement amount is determined by the following formula:

[0048]

[0049] Where: S is the final settlement of the dam body or dam foundation; P i is the vertical stress of the calculated soil layer caused by the dam body load, kPa; E iis the deformation modulus of the i-th calculated soil layer, kPa; h i is the thickness of the i-th soil layer, m.

[0050] S3. For the steel bar binding, formwork, water stop erection, concrete pouring and curing of the clip-on base, the longitudinal joints of the base should be staggered with the joints of the concrete anti-seepage wall groove section;

[0051] S4, dam filling, wave-breaking wall reinforcement binding, formwork, water stop erection, concrete construction;

[0052] S5. Dam top filling and road surface construction.

[0053] Embodiment 2

[0054] This embodiment provides a snap-on vertical seam connection structure of a concrete anti-seepage wall and a wave-breaking wall, which is mainly composed of a concrete anti-seepage wall 01, a reserved dowel bar 02, a snap-on base 03, a water stop (04, 05, 06, 07), a connecting plate 08, a dam body 09, and a wave-breaking wall 10. The snap-on base 03 is arranged between the concrete anti-seepage wall 01 and the wave-breaking wall 10, and the bottom of the snap-on base 03 is connected to the concrete anti-seepage wall 01; the top of the snap-on base 03 is located at the end of the bottom plate of the wave-breaking wall 10, and the vertical seam is closed by a water stop (04, 05). The neck of the snap-on base 03 is reserved to ensure that there is no uneven settlement on the dam top and to ensure the settlement amount of deformation coordination of the wave-breaking wall 10.

[0055] In this embodiment, the snap-on base 03 is a cast-in-place concrete base. Before casting the base, the surface of the concrete anti-seepage wall 01 is roughened, and the embedded reinforcing bars are bent and extended into the base.

[0056] In this embodiment, the bottom of the snap-on base 03 is connected to the concrete anti-seepage wall 01 through inserted reinforcement, and has good integrity; the edges on both sides of the snap-on base 03 are sloped to ensure the filling quality of the dam body 09.

[0057] In this embodiment, the overcast section of the concrete anti-seepage wall 01 is chiseled out, the reserved steel bars are cleaned and bent to the anchoring angle, and the wall top connection section is roughened.

[0058] In this embodiment, the waterstop (04, 05) is selected from copper waterstop or rubber waterstop according to the project scale and deformation calculation results.

[0059] In this embodiment, the wave-breaking wall 10 is far away from the anti-seepage axis, and the wave-breaking wall 10 is connected to the concrete anti-seepage wall 01 through a connecting plate 08. Multiple connecting plates 08 can be set locally, and the vertical joints between the connecting plates 08 are closed with water stops (06, 07).

[0060] In this embodiment, the construction method includes the following steps:

[0061] S1. Remove the overcast section of the poured concrete anti-seepage wall, chisel out the embedded connecting bars, bend them to the anchoring angle and clean them; roughen the surface within the interface between the top of the concrete anti-seepage wall and the buckle-type base casting;

[0062] S2. Snap-on base arrangement. To avoid the base restricting the overall deformation of the wave-breaking wall, a suitable reserved settlement space is planned for the base neck according to the characteristics of the dam body and dam foundation, and the base shape is determined; the settlement amount is determined by the following formula:

[0063]

[0064] Where: S is the final settlement of the dam body or dam foundation; P i is the vertical stress of the calculated soil layer caused by the dam body load, kPa; E i is the deformation modulus of the i-th calculated soil layer, kPa; h i is the thickness of the i-th soil layer, m.

[0065] S3. For the steel bar binding, formwork, water stop erection, concrete pouring and curing of the clip-on base, the longitudinal joints of the base should be staggered with the joints of the concrete anti-seepage wall groove section;

[0066] S4, dam filling, wave-breaking wall reinforcement binding, formwork, water stop erection, concrete construction; when the anti-seepage axis is far away from the wave-breaking wall, the connecting plate reinforcement, water stop and concrete are constructed simultaneously;

[0067] S5. Dam top filling and road surface construction.

[0068] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A buckle-type vertical seam connection structure of a concrete anti-seepage wall and a wave-breaking wall, characterized in that: It includes a concrete anti-seepage wall, a wave-breaking wall and a snap-on base between the two. The bottom of the snap-on base is connected to the concrete anti-seepage wall; The top of the snap-on base is located at the end of the wave-breaking wall bottom plate, and the vertical seams are sealed with water stops; The neck of the snap-on base is reserved to ensure that uneven settlement does not occur on the dam top and that the deformation of the wave-breaking wall is coordinated with the settlement.

2. The buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall according to claim 1 is characterized in that: The snap-on base is a cast-in-place concrete base. Before casting the base, the surface of the concrete anti-seepage wall is roughened, and the embedded reinforcing bars are bent and extended into the base.

3. The buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall according to claim 2 is characterized in that: The bottom of the snap-on base is connected to the concrete anti-seepage wall through inserted reinforcement, and has good integrity; the edges on both sides of the snap-on base are sloped to ensure the filling quality of the dam body.

4. The buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall according to claim 3 is characterized in that: The overcast section of the concrete anti-seepage wall is chiseled out, the reserved steel bars are cleaned and bent to an anchoring angle, and the wall top connection section is roughened.

5. The buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall according to claim 1 is characterized in that: The waterstop is selected from copper waterstop or rubber waterstop according to the project scale and deformation calculation results.

6. The buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall according to claim 1 is characterized in that: When the wave-breaking wall is far away from the anti-seepage axis, the wave-breaking wall is connected to the concrete anti-seepage wall through a connecting plate, and multiple connecting plates can be arranged locally.

7. The buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall according to claim 1 is characterized in that: The amount of sedimentation is determined by the following formula: Where: S is the final settlement of the dam body or dam foundation; P i is the vertical stress of the calculated soil layer caused by the dam body load, kPa; E i is the deformation modulus of the i-th calculated soil layer, kPa; h i is the thickness of the i-th soil layer, m.

8. The buckle-type vertical joint connection structure of the concrete anti-seepage wall and the wave-breaking wall according to claim 1 is characterized in that: The construction method includes the following steps: S1. Remove the overcast section of the poured concrete anti-seepage wall, chisel out the embedded connecting bars, bend them to the anchoring angle and clean them; roughen the surface within the interface between the top of the concrete anti-seepage wall and the buckle-type base casting; S2. Snap-on base arrangement: To avoid the base restricting the overall deformation of the wave-breaking wall, a suitable reserved settlement space at the base neck is planned according to the characteristics of the dam body and dam foundation, and the base shape is determined; S3. For the steel bar binding, formwork, water stop erection, concrete pouring and curing of the clip-on base, the longitudinal joints of the base should be staggered with the joints of the concrete anti-seepage wall groove section; S4, dam filling, wave-breaking wall reinforcement binding, formwork, water stop erection, concrete construction; when the anti-seepage axis is far away from the wave-breaking wall, the connecting plate reinforcement, water stop, and concrete are constructed simultaneously; S5. Dam top filling and road surface construction.

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