CN221235996U

CN221235996U - Novel dam structure for geological conditions with non-uniform stratum lithology

Info

Publication number: CN221235996U
Application number: CN202322946430.XU
Authority: CN
Inventors: 王庆; 包松林
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2024-06-28
Anticipated expiration: 2033-11-01

Abstract

The utility model discloses a novel dam structure for geological conditions with non-uniform stratum lithology, which comprises the following components: the weir body is of a grout block Dan Waibao reinforced concrete structure, and a curved weir surface is adopted for the weir top to pass through the water surface; the cylindrical concrete piles are arranged at the lower ends of the weir bodies and buried underground; the reinforcing component is connected with the upstream of the weir; the anti-collision assembly is abutted to the downstream of the weir body, and the reinforcing assembly and the anti-collision assembly both comprise reinforcing tooth walls buried underground. The dam structure solves the technical problems of high construction cost of a low dam type engineering under the condition of non-uniformity of stratum lithology, poor adaptability and stability of foundation lithology change and the like in the prior art.

Description

Novel dam structure for geological conditions with non-uniform stratum lithology

Technical Field

The utility model relates to the technical field of hydraulic engineering, in particular to a novel dam structure for geological conditions with non-uniform stratum lithology.

Background

The low dam type of the existing gravity dam is constructed under complex geological conditions of a plurality of wide and shallow rivers in China, has poor adaptability to foundation lithology change, large excavation quantity of earth and stone and high construction cost. The reason is that gravity dam site selection requires adequate strength and integrity and uniformity of the dam foundation rock. Formation lithology inhomogeneities are an important challenge in the construction of dams. Formation lithology refers to the composition, physicochemical properties, color, structure, and the like of the rock that makes up the formation. Rock on the earth surface is decomposed into rock scraps through physical and chemical weathering and is transported to be sediments, and the sediments are in a loose state and are called as a fourth sedimentary layer, namely 'soil'. The formation lithology refers to lithology of a site of a selected dam for hydraulic and hydroelectric engineering construction, for example, the lithology distribution of the site of the dam from top to bottom is as follows: the first layer is a new flood control and impact lamination layer of a fourth system, and lithology is pale yellow fine sand; the second layer is a new system layer on the third system, and the lithology is reddish brown old clay; the third layer is a system-opening group layer on the dwarfism system, and the lithology is gray tuff; the fourth layer is early-stage invasion rock stratum of Yanshan, and lithology is reddish brown biotite granite. The depth of each layer is variable, namely the thickness is variable, and the allowed bearing capacity, water permeability and other indexes of each layer are quite different, so that the dam foundation is necessarily built on a complete stratum with the same lithology, and the excavation amount can only be increased downwards. If the novel dam structure is used, the large excavation of engineering construction can be avoided, and the excavation amount of the earth and stone can be greatly reduced.

Aiming at the problems that the stability and the flood resistance of a main building overflow dam in water conservancy and hydropower engineering are insufficient and a relief pool thereof is easy to be destroyed by water when the flow speed is high, the flood capacity is high, the peak value is high and the impact force is strong in some river sudden floods or regional mountain floods, a novel practical dam type structure is required to be invented, the earth and stone excavation amount of a dam built under the condition of non-uniform stratum lithology is reduced, the engineering cost is reduced, the stability of the dam body is maintained when the flood is checked or the flood is even and exceeds the standard, the damage caused by flood scouring is effectively reduced, and the disaster resistance and disaster reduction capability of the engineering are enhanced.

Disclosure of utility model

The application provides a novel dam structure for geological conditions with nonuniform formation lithology, which solves the technical problems of high construction cost of a low dam type engineering, poor adaptability stability of foundation lithology change and the like under the nonuniform formation lithology condition in the existing dam construction practice.

The utility model adopts the technical scheme that: a novel dam structure for use in formation lithology non-uniform geological conditions, comprising: the top end of the weir body adopts a curved weir surface; the cylindrical concrete piles are arranged at the lower ends of the weir bodies and buried underground; the reinforcing component is connected with the upstream of the weir body and comprises a reinforcing tooth wall buried underground; and the anti-flushing assembly is arranged at the downstream of the weir body.

Further, the reinforcement assembly further comprises a blocking plate, one end, far away from the weir body, of the blocking plate is provided with a reinforcement tooth wall, the blocking plate is made of reinforced concrete, and steel bars of the blocking plate are connected with the weir body.

Further, an anti-washing tooth wall is further arranged at the downstream of the weir body, and the anti-flushing component is abutted against the anti-washing tooth wall.

Further, the impact assembly further comprises an impact plate, and a group of reinforcing tooth walls are respectively arranged at the upstream end and the downstream end of the impact plate.

Further, a reverse filtering layer is arranged below the impact plate, and a drain hole is further formed in the part, close to the downstream, of the impact plate.

Further, the impact plate is made of reinforced concrete, a settlement joint is arranged between the impact plate and the anti-panning tooth wall, and a water stopping material is filled in the joint.

Further, the weir body comprises a serous masonry layer filled in the center of the weir body and a reinforced concrete layer coated on the outer layer of the serous masonry layer.

Further, the weir also includes at least one drain communicating the lowermost surface of the curvilinear weir surface and the downstream bottom of the weir.

Further, the weir body comprises a plurality of weir blocks, the plurality of weir blocks are sequentially connected in the length direction of the weir body, expansion joints are arranged between adjacent weir blocks, and water stopping materials are filled in the expansion joints.

Compared with the prior art, the dam body is provided with the cylindrical concrete pile by adopting the curved dam surface design at the top end, and the reinforcing component and the anti-impact component are arranged at the upstream end and the downstream end of the dam body, so that the overall stability of the dam body can be improved, the risks of sliding and overturning of the dam body are reduced, more importantly, the sectional area of the dam body is reduced, the consumption of concrete and stone of the dam body is reduced, the non-uniform geological conditions of stratum lithology can be well adapted through the structure, the structural strength and the stability of the whole dam body are ensured, the large excavation of engineering construction is avoided, the excavation quantity of earth and stone is greatly reduced, and the engineering cost is remarkably reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a novel dam structure according to a main embodiment of the present utility model;

FIG. 2 is a schematic plan view of a weir block according to the present utility model;

Fig. 3 is a schematic diagram of a cross-sectional structure (with bridge) of a novel dam structure according to other embodiments of the present utility model.

1. A weir body; 11. a curvilinear weir surface; 12. anti-wash tooth wall; 2. a cylindrical concrete pile; 3. a reinforcement assembly; 31. a slide blocking plate; 4. an anti-collision component; 41. a wash-resistant plate; 5. reinforcing the tooth wall; 6. a reverse filtration layer; 13. a stone layer; 14. a reinforced concrete layer; 111. a curve segment; 112. a straight line segment; 113. a reverse arc section; 7. a drain pipe; 15. a weir block; 16. an expansion joint; 8. and a traffic bridge.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The utility model provides a novel dam structure for geological conditions with nonuniform stratum lithology, as shown in figure 1, in a main embodiment, the dam structure mainly comprises a dam body 1, a cylindrical concrete pile 2, a reinforcing component 3 and an anti-flushing component 4, wherein the dam body 1 is a main body structure of the whole dam and is used for intercepting water flow, the top end of the dam body 1 is designed by adopting a curved dam surface 11, so that the water flow is smooth, at least one cylindrical concrete pile 2 is arranged at the lower end of the dam body and buried underground, and the piles are component parts of the dam, bear vertical force and horizontal force and have anti-skid stabilization effect; the reinforcing component 3 is positioned at the upstream of the weir body 1 and is connected with the weir body 1, and comprises structures such as a baffle plate 31, a reinforcing tooth wall 5 buried underground and the like; the anti-flushing assembly 4 is positioned at the downstream of the weir body 1 and is separated from the weir body 1, and the anti-flushing assembly also comprises structures such as a reinforced toothed wall 5 buried underground, and the like, so that flushing and dam toe flushing after the water flows through the weir are reduced, and the stability of the dam is improved.

When the cylindrical concrete pile 2 is built, firstly, a borehole with a certain diameter is formed in soil by using mechanical construction, after the borehole reaches a designed elevation, a reinforcement cage (cage) is hung into the borehole and poured, soil residues in pile holes are discharged out of the ground during drilling, in order to prevent hole collapse during drilling, the hole wall is protected by using prepared wall protection slurry, after secondary hole cleaning (hole bottom sediment removal), the reinforcement cage is placed, and a cylindrical member (reinforced concrete pile) is formed after concrete is poured.

By using a curved weir surface 11 at the top of the weir 1, the distribution of the water flow over the weir 1 can be improved so that the water flow is smoother. The dam body 1 is provided with the cylindrical concrete pile 2, the cylindrical concrete pile 2 has the characteristics of high bearing capacity and small pile body deformation, the condition of variation lithology non-uniformity of the foundation strata under complex geological conditions can be better adapted, the stability of the dam body is improved, the risks of foundation deformation and sliding are reduced, the cross-sectional area of a gravity dam (weir) is reduced, and the dosage of concrete and stone materials of the dam body is reduced. Meanwhile, the reinforcing component 3 and the anti-flushing component 4 are arranged at the upper and downstream ends of the weir body 1, the stability of the weir body 1 is enhanced through structures such as the reinforcing toothed wall 5, the weir body can better resist the impact and the flushing of water flow, the structure can be well adapted to the geological conditions with nonuniform formation lithology, the structural strength and the stability of the whole dam body are ensured, the large excavation of engineering construction is avoided, the excavation amount of earth and stone is greatly reduced, and the engineering cost is remarkably reduced.

Further, the reinforcement assembly 3 further comprises a sliding-resisting plate 31 for connecting the reinforcement toothed wall 5 and the weir body 1, the sliding-resisting plate 31 is used for increasing friction resistance, is connected with the weir body 1 by steel bars, can prevent the weir body from sliding and enhance stability of the weir, the sliding-resisting plate 31 is made of reinforced concrete, the steel bars of the sliding-resisting plate 31 are connected with the steel bars in the weir body 1, a plain concrete cushion layer is arranged below the sliding-resisting plate 31 so as to increase integral rigidity and stability, and the sliding-resisting plate 31 has the function of increasing friction resistance, is connected with the steel bars for the weir body, can prevent the weir body from sliding and enhance the anti-sliding stability of the weir; the downhill in the reinforced tooth wall 5 is vertical.

Further, a wash-proof tooth wall 12 is arranged at the downstream of the weir body 1, and a settlement joint is arranged between the wash-proof assembly 4 and the wash-proof tooth wall 12 and is filled with water stopping materials; the anti-wash tooth wall 12 is buried deep in the ground, and the anti-wash tooth wall 12 is a special structure for preventing the high-speed water flow or the wall-attached flow from scouring and washing the weir bottom of the downstream weir body 1. The anti-flushing assembly 4 further comprises an anti-flushing plate 41, wherein a group of reinforced toothed walls 5 are respectively arranged at the upstream end and the downstream end of the anti-flushing plate 41, the anti-flushing plate 41 is made of reinforced concrete, gaps are reserved between the anti-flushing plate 41 and the weir body 1, and water-stopping materials are filled in the anti-flushing plate, the anti-flushing plate 41 has the main effects of reducing local impact pressure caused by high-speed water flow, further reducing flushing risk, enhancing the whole anti-flushing capability, and meanwhile, a reverse filtering layer 6 is arranged below the anti-flushing plate 41, and is a facility for preventing soil from being damaged by penetration and guaranteeing drainage by a plurality of layers of sand stones which are arranged on fine-grained soil layers and coarse-grained soil layers through screening. The downstream portion of the impingement plate 41 is also provided with drain holes that function to drain the permeate water stream from the foundation downstream and reduce the permeate pressure at the bottom end of the plate.

In summary, the reinforcement component 3 is connected with the weir body 1 by using the steel bars, so that the stability of the dam body can be further enhanced; the anti-flushing component 4 and the anti-washing tooth wall 12 are provided with a settlement joint and filled with water stopping materials, and have the functions of resisting flushing and washing erosion, and the anti-flushing component and the anti-washing tooth wall are used for ensuring the safe and stable operation of the dam body.

Specifically, the curved weir surface 11 is composed of a curved section 111, a straight line section 112 and an anti-arc section 113 which are sequentially arranged from upstream to downstream, the weir surface has good overflow condition, the weir body 1 further comprises at least one drain pipe 7 which is communicated with the lowest surface of the anti-arc section 113 and the downstream bottom of the weir body 1, the drain pipe 7 is arranged at the anti-arc section 113 in consideration of the problem of frost heaving of concrete caused by winter freezing of northern rivers, the inlet of the drain pipe 7 is arranged at the lowest position of the anti-arc section 113 of the weir, the inlet end of the pipe is flush with the lowest bottom surface of the anti-arc section 113 of the weir, the inlet connecting line of the drain pipe 7 is parallel to the axis of the weir, each drain pipe 7 is vertically arranged in the weir body 1, the lower half part of the drain pipe 7 is bent to the downstream to be parallel to the weir bottom, the outlet of the drain pipe 7 extends out of the weir body 1, and the drain pipe 7 is used for preventing frost heaving damage caused by water accumulation in the anti-arc section 113 of the winter.

Further, the weir body 1 is composed of a grout stone layer 13 filled in the center of the weir body and a reinforced concrete layer 14 coated on the outer layer of the grout stone layer 13, the grout stone layer 13 is positioned in the center of the weir body 1 and is a plurality of layers of stone blocks built by cement mortar, the reinforced concrete layer 14 is coated on the outer layer of the grout stone layer 13, the reinforced concrete layer 14 has higher strength and durability and can effectively bear water pressure and external load, and the weir body adopts a structural form of combining reinforced concrete and the concrete, so that the requirements of mechanics and impact and compression strength can be met.

When in construction, referring to figures 1 and 2, the application divides the weir body 1 into a plurality of weir blocks 15, the weir blocks 15 are sequentially connected in the length direction of the weir body 1, an expansion joint 16 is arranged between adjacent weir blocks 15, and the expansion joint 16 is filled with water stop materials. The weir blocks 15 are basic units forming the whole weir body 1, and are sequentially connected together to form the length of the weir body 1, the weir body of each weir block 15 is identical, an expansion joint 16 is arranged between adjacent weir blocks 15 and used for structural deformation or expansion and contraction caused by temperature and the like, the expansion joint 16 can allow the weir body 1 to freely move during deformation, the risk of stress accumulation and structural damage is reduced, the expansion joint 16 is filled with a water stopping material which can effectively prevent water flow from passing through the gap, the water stopping material can be rubber, polymer or other materials with good sealing performance, and the water stopping function is to prevent water from leaking to the downstream of the weir body 1 through the expansion joint 16 and maintain the overall stability of the weir body 1. By arranging the expansion joint 16 and filling the water stop material, the structure of the weir body 1 can adapt to different deformation and environmental conditions, and the stability and the safety of the weir body are ensured.

Further, as shown in fig. 3, in other embodiments, a traffic bridge 8 may be further disposed at the top of the weir body 1, the bridge columns of the traffic bridge 8 are two rows of reinforced concrete columns, the heights of the bridge columns are different, the top of each column is provided with a capping beam, the bridge deck is paved on the capping beams, and the guardrail is installed, so that the traffic bridge 8 can play roles in fighting flood, repairing and maintaining, observing and inspecting, and can also facilitate two-shore traffic.

In conclusion, the application has remarkable effects in water retaining, water storage, flood discharge and other aspects, can greatly reduce engineering cost and save investment, generates good economic benefit, can stagnate and store partial flood when meeting flood, reduces flood peaks, lightens downstream flood disasters, can better ensure life and property safety of people and promote economic and social development.

The foregoing description of the preferred embodiment of the utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. A novel dam structure for use in formation lithology non-uniform geological conditions, comprising: the top end of the weir body adopts a curved weir surface; the cylindrical concrete piles are arranged at the lower ends of the weir bodies and buried underground; the reinforcing component is connected with the upstream of the weir body and comprises a reinforcing tooth wall buried underground; and the anti-flushing assembly is arranged at the downstream of the weir body.

2. The dam structure of claim 1, wherein the reinforcement assembly further comprises a skid plate, wherein one end of the skid plate away from the weir body is provided with a reinforcement tooth wall, the skid plate is made of reinforced concrete, and the steel bars of the skid plate are connected with the weir body.

3. The novel dam structure of claim 1, wherein a tooth-wash prevention wall is further provided downstream of the dam, and the impact prevention assembly abuts against the tooth-wash prevention wall.

4. A novel dam construction according to claim 3, wherein said impingement assembly further comprises impingement plates, said impingement plates each having a set of reinforcing tooth walls at an upstream end and a downstream end.

5. The dam structure according to claim 4, wherein a reverse filter layer is further provided under the impact plate, and a drain hole is further provided in a portion of the impact plate near downstream.

6. The dam structure according to claim 4, wherein the impact plate is made of reinforced concrete, a settlement joint is arranged between the impact plate and the anti-panning tooth wall, and a water stop material is filled in the joint.

7. The novel dam structure of claim 1, wherein the weir body comprises a masonry layer filled in the center thereof and a reinforced concrete layer coated on the outer layer of the masonry layer.

8. The novel dam structure of claim 1, wherein said weir further comprises at least one drain communicating a lowermost surface of said curvilinear weir surface and a downstream bottom of the weir.

9. The novel dam structure according to claim 1, wherein the dam body comprises a plurality of dam blocks, the plurality of dam blocks are sequentially connected in the length direction of the dam body, expansion joints are arranged between adjacent dam blocks, and water stop materials are filled in the expansion joints.