Spillway discharge chute structure for soil matrix

Abstract

The spillway discharge chute structure comprises a bottom plate and side walls on the two sides, the bottom plate and the side walls are connected with each other, the upper surface of the bottom plate is an inclined face, the lower surface of the bottom plate comprises a horizontal anti-slip discharge chute section, a slope discharge chute section and a tooth groove section which are sequentially arranged from upstream to downstream, and a concrete cushion layer is laid on the lower surface of the bottom plate. A broken stone cushion layer is laid on the lower surface of the concrete cushion layer. According to the spillway discharge chute structure for the soil foundation, the spillway discharge chute structure can well adapt to and meet the construction conditions of sand gravel and the soil foundation, when water flow quickly flows through, discharge chute loads can be evenly transmitted to the soil foundation, uneven settlement of the soil foundation caused by too large local stress can be avoided, smooth transition of the water flow is achieved, and the service life of the spillway discharge chute structure is prolonged. The safety of overall engineering construction and use is improved, and the method has the advantages of being simple in engineering construction, capable of saving investment and high in stability and durability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering construction, and relates to a spillway chute structure for soil base. BACKGROUND

[0002] The spillway is an important control discharge building of the reservoir hub project and is widely applied to various water conservancy and hydropower projects. The spillway chute has the characteristics of large axial length and large engineering quantity, and in particular, the chute cannot be arranged in a turning manner due to high water flow velocity in the chute, and the chute arrangement is obviously affected by topographic and geological factors.

[0003] In the loess plateau and hilly areas, the spillway chute often needs to be partially built on the gravel, loess and other soil-covered layer foundation. However, the shear strength index and bearing capacity of the soil base are usually significantly lower than those of the rock foundation, which is not conducive to the anti-skid and stability of the spillway chute, and brings many adverse effects on the arrangement and construction of the spillway chute. The invention patent with the publication number CN119041369A and the publication date of November 29, 2024 discloses a soil base spillway structure with a bottom-expanded anchoring column pier, which solves the problems of up-down vibration, sliding along the water flow direction and vertical settlement of the soil base spillway bottom plate by setting the bottom-expanded anchoring column pier.

[0004] Therefore, in view of the insufficient anti-skid ability of the existing chute structure, measures such as increasing the excavation depth, replacing the soil with ash, and increasing the support are usually taken for the spillway chute, which has the problems of long construction period, large engineering quantity, and complicated process, and has a great influence on the engineering progress, engineering safety and overall cost. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a spillway chute structure for soil base, which solves the problem of poor anti-skid ability of the soil base spillway chute structure in the prior art.

[0006] The utility model adopts the technical scheme that the spillway chute structure for soil base comprises a bottom plate, vertical side walls are fixedly connected to the two sides of the bottom plate, the lower surface of the bottom plate comprises a horizontal anti-skid chute section, an inclined chute section and a tooth groove section which are sequentially arranged, the upper surface of the bottom plate is parallel to the inclined chute section, and a concrete cushion layer and a gravel cushion layer are sequentially laid from top to bottom at the bottom of the bottom plate.

[0007] The utility model has the characteristics that:

[0008] The horizontal anti-skid chute section is arranged in the horizontal direction, and the horizontal length thereof is L1, the horizontal length of the inclined chute section is L2, the horizontal length of the tooth groove section is L3, and L1+L2+L3=L, L is 10-20 meters.

[0009] L1 is 1 / 4L-1 / 3L, and L1 is not less than 3 meters.

[0010] The slope ratio of the slope spillway section is 1:m0, m0 is 2.5-5, the thickness d of the slope spillway section is 0.05L-0.1L, and d is not less than 1 meter.

[0011] The tooth groove section comprises an inverse slope and a horizontally arranged groove bottom horizontal section.

[0012] The slope ratio of the inverse slope is 1:m, m is m0 / 4-m0 / 3.

[0013] The vertical thickness D of the groove bottom horizontal section is 2d-3d, and D is not less than 2 meters; the length B of the groove bottom horizontal section is 0.5d-0.5D.

[0014] The concrete strength grade C0 of the bottom plate and the side wall is C25-C35; the concrete strength grade C of the concrete cushion layer is C0-10, and the thickness is 0.1 meter.

[0015] The surface of the concrete cushion layer is slightly exposed to coarse sand.

[0016] The thickness d1 of the gravel cushion layer is 0.15d, and the material classification is gravel.

[0017] The beneficial effects of the utility model are:

[0018] The spillway spillway structure for the soil foundation provided by the utility model can better adapt to the sand gravel and soil foundation construction conditions, the spillway load can be uniformly transmitted to the soil foundation when the water flow rapidly flows, the uneven settlement of the soil foundation caused by excessive local stress can be avoided, the water flow is smoothly transitioned, the safety of the overall engineering construction and use is improved, and the utility model has the characteristics of simple engineering construction, investment saving, high stability and durability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the longitudinal sectional view of the spillway spillway structure for the soil foundation of the utility model;

[0020] Figure 2 is the transverse sectional view of the spillway spillway structure for the soil foundation of the utility model.

[0021] In the drawing, 1. horizontal anti-skid spillway section, 2. slope spillway section, 3. tooth groove section, 4. concrete cushion layer, 5. gravel cushion layer, 6. bottom plate, 7. side wall. DETAILED DESCRIPTION

[0022] The utility model will be described in detail in combination with the drawings and specific embodiments.

[0023] For example, Figure 2The utility model is shown, the utility model discloses a spillway chute structure for soil base, including bottom plate 6, the vertical side wall 7 of bottom plate 6 both sides is fixedly connected, and bottom plate 6 bottom is successively laid with concrete cushion layer 4 and broken stone cushion layer 5 from top to bottom. Figure 1 The utility model is shown, and the lower surface of bottom plate 6 includes successively arranged horizontal anti-skid chute section 1, slope chute section 2 and tooth groove section 3, and the upper surface of bottom plate 6 is parallel with slope chute section 2.

[0024] Horizontal anti-skid chute section 1 is arranged in horizontal direction, and the horizontal direction length thereof is L1, the horizontal direction length of slope chute section 2 is L2, the horizontal direction length of tooth groove section 3 is L3, and L1+L2+L3=L, and L is 10-20 meters.

[0025] L1 is 1 / 4L-1 / 3L, and L1 is not less than 3 meters.

[0026] The slope ratio of slope chute section 2 is 1:m0, m0 is 2.5-5, the thickness d of slope chute section 2 is 0.05L-0.1L, and d is not less than 1 meter.

[0027] Tooth groove section 3 includes reverse slope and horizontally arranged groove bottom horizontal section.

[0028] The slope ratio of reverse slope is 1:m, and m is m0 / 4-m0 / 3.

[0029] The vertical direction thickness D of groove bottom horizontal section is 2d-3d, and D is not less than 2 meters, and the length B of groove bottom horizontal section is 0.5d-0.5D.

[0030] The concrete strength grade C0 of bottom plate 6 and side wall 7 is C25-C35, and the concrete strength grade C of concrete cushion layer 4 is C0-10, and the thickness is 0.1 meters.

[0031] The surface of concrete cushion layer 4 is slightly exposed to coarse sand.

[0032] The thickness d1 of broken stone cushion layer 5 is 0.15d, and the material classification is broken stone.

[0033] When engineering is implemented, the whole spillway chute includes the chute structure in the utility model connected successively, and the terminal of tooth groove section 3 in each chute is connected with the starting position of horizontal anti-skid chute section 1 of the next chute, and the connecting place between each chute and between horizontal anti-skid chute section 1, slope chute section 2 and tooth groove section 3 in each chute is not provided with a joint, and is integrally poured along the symmetry axis.

[0034] The "Water Conservancy and Hydropower Engineering Construction Quality Inspection and Evaluation Regulations" stipulates the quality inspection methods and evaluation standards of various materials including gravel in water conservancy and hydropower engineering. In the spillway chute engineering, the quality of the gravel needs to be inspected and evaluated according to the regulations, such as the detection methods and qualified standards of the particle size, silt content, and mud content of the gravel. Different water conservancy spillway chutes will further refine and adjust these standard requirements of the gravel according to the specific flood discharge capacity, water flow velocity, engineering grade, and other conditions to ensure that the spillway chute can operate safely and efficiently.

[0035] The working principle of the spillway chute structure for the soil foundation of the utility model is as follows:

[0036] When the spillway chute is located on the soil foundation, various factors can cause the generation of the sliding force. On the one hand, the chute itself has a certain weight, and since it is usually laid along the soil foundation with a certain slope, a downward component force will be generated along the slope direction under the action of gravity, which is part of the source of the sliding force. On the other hand, during the flood discharge process, the high-speed water flow will generate hydrodynamic pressure on the chute, and the hydrodynamic pressure also has a component force along the slope direction of the chute. Moreover, the greater the water flow velocity and the flow rate, the greater this component force, which together with the gravity component force constitutes the total sliding force.

[0037] The spillway chute structure for the soil foundation of the utility model increases the horizontal anti-skid chute section 1 and the tooth groove section 3 on the lower surface of the chute and performs surface treatment on the concrete cushion layer 4 to expose the coarse sand, thereby increasing the contact area between the chute and the soil foundation, increasing the friction force, and improving the anti-skid force. When the water flow passes through the chute quickly, the soil body can generate passive soil pressure, and the direction of the passive soil pressure is towards the direction of resisting the sliding of the chute, further increasing the anti-skid force and effectively improving the anti-skid stability of the chute. Moreover, the multiple utility model structures are connected and arranged, which can resist the sliding force in sections, making the anti-skid effect more uniform and reliable and avoiding the situation of insufficient local anti-skid.

[0038] The spillway chute structure for the soil foundation of the utility model does not need to perform replacement, excavation, and other treatments on the foundation surface, does not need to specially prepare new materials, and does not affect the construction period of the spillway. Only the conventional materials commonly used in the construction of the existing conventional spillway chute can be used to perform the spillway construction on the gravel and soil foundation, greatly reducing the construction difficulty, construction period, and construction cost.

[0039] Embodiment 1

[0040] The chute is located on the soil foundation, and after excavation, the disturbed part of the foundation surface is tamped; within the 2m depth range of the foundation surface, the compaction degree of the cohesive soil is not less than 0.96, and the relative density of the non-cohesive soil is not less than 0.7.

[0041] The overflow spillway structure for soil foundation comprises a bottom plate 6, vertical side walls 7 fixed on both sides of the bottom plate 6, and a horizontal anti-skid spillway section 1, an inclined spillway section 2 and a tooth groove section 3 arranged in sequence on the lower surface of the bottom plate 6.

[0042] The horizontal anti-skid spillway section 1 is arranged in the horizontal direction, and the horizontal length L1 thereof is 3.5 meters; the horizontal length L2 of the inclined spillway section 2 is 6.9 meters; and the horizontal length L3 of the tooth groove section 3 is 1.6 meters, that is, the total length L of the single-section spillway is 12 meters.

[0043] The slope ratio 1:m0 of the inclined spillway section 2 is 1:3.5, and the thickness d of the inclined spillway section 2 is 1 meter.

[0044] The tooth groove section 3 comprises an inverse slope and a horizontally arranged groove bottom horizontal section, the slope ratio 1:m of the inverse slope is 1:1, the vertical thickness D of the groove bottom horizontal section is 2.1 meters, and the horizontal length B of the groove bottom horizontal section is 0.5 meters.

[0045] The concrete strength grade of the bottom plate 6 and the side walls 7 is C25, and the concrete strength grade of the concrete cushion layer 4 is C15, and the thickness thereof is 0.1 meter.

[0046] The surface of the concrete cushion layer 4 is slightly exposed to coarse sand.

[0047] The thickness d1 of the gravel cushion layer 5 is 0.15 meters, and the material classification thereof is gravel.

[0048] Embodiment 2

[0049] The overflow spillway structure for soil foundation comprises a bottom plate 6, vertical side walls 7 fixed on both sides of the bottom plate 6, and a horizontal anti-skid spillway section 1, an inclined spillway section 2 and a tooth groove section 3 arranged in sequence on the lower surface of the bottom plate 6.

[0050] The horizontal anti-skid spillway section 1 is arranged in the horizontal direction, and the horizontal length L1 thereof is 3 meters; the horizontal length L2 of the inclined spillway section 2 is 8 meters; and the horizontal length L3 of the tooth groove section 3 is 2 meters, that is, the total length L of the single-section spillway is 13 meters.

[0051] The slope ratio 1:m0 of the inclined spillway section 2 is 1:3.2, and the thickness d thereof is 1 meter.

[0052] The tooth groove section 3 comprises an inverse slope and a horizontally arranged groove bottom horizontal section, the slope ratio 1:m of the inverse slope is 1:1, the vertical thickness D of the groove bottom horizontal section is 2 meters, and the horizontal length B of the groove bottom horizontal section is 1 meter.

[0053] The concrete strength grade of the bottom plate 6 and the side wall 7 is C30, the concrete strength grade of the concrete cushion 4 is C20, and the thickness is 0.1 meters.

[0054] The surface of the concrete cushion 4 is slightly exposed to coarse sand.

[0055] The thickness d1 of the gravel cushion 5 is 0.15 meters, and the material classification is gravel.

[0056] Example 3

[0057] The spillway chute structure for the soil foundation comprises a bottom plate 6, vertical side walls 7 fixed on both sides of the bottom plate 6, a horizontal anti-skid chute section 1, an inclined chute section 2, and a tooth groove section 3 arranged in sequence on the lower surface of the bottom plate 6, and the upper surface of the bottom plate 6 is parallel to the inclined chute section 2. The bottom plate 6 is sequentially laid with a concrete cushion 4 and a gravel cushion 5 from top to bottom at the bottom of the bottom plate 6.

[0058] The horizontal anti-skid chute section 1 is arranged in the horizontal direction, and the horizontal length L1 thereof is 4 meters. The horizontal length L2 of the inclined chute section 2 is 9 meters, and the horizontal length L3 of the tooth groove section 3 is 2.2 meters, that is, the total length L of the single chute section is 15.2 meters.

[0059] The slope ratio 1:m0 of the inclined chute section 2 is 1:3.8, and the thickness d is 1 meter.

[0060] The tooth groove section 3 comprises an inverted slope and a horizontally arranged groove bottom horizontal section. The slope ratio 1:m of the inverted slope is 1:0.8. The vertical thickness D of the groove bottom horizontal section is 2.5 meters, and the horizontal length B of the groove bottom horizontal section is 0.8 meters.

[0061] The concrete strength grade of the bottom plate 6 and the side wall 7 is C25, the concrete strength grade of the concrete cushion 4 is C15, and the thickness is 0.1 meters.

[0062] The surface of the concrete cushion 4 is slightly exposed to coarse sand.

[0063] The thickness d1 of the gravel cushion 5 is 0.15 meters, and the material classification is gravel.

[0064] Example 4

[0065] The spillway chute structure for the soil foundation comprises a bottom plate 6, vertical side walls 7 fixed on both sides of the bottom plate 6, a horizontal anti-skid chute section 1, an inclined chute section 2, and a tooth groove section 3 arranged in sequence on the lower surface of the bottom plate 6, and the upper surface of the bottom plate 6 is parallel to the inclined chute section 2. The bottom plate 6 is sequentially laid with a concrete cushion 4 and a gravel cushion 5 from top to bottom at the bottom of the bottom plate 6.

[0066] The horizontal stop sliding spillway section 1 is arranged horizontally, and the horizontal length L1 thereof is 3.3 meters, the horizontal length L2 of the slope spillway section 2 is 7.5 meters, and the horizontal length L3 of the tooth groove section 3 is 1.8 meters, that is, the total length L of the single-section spillway is 12.5 meters.

[0067] The slope ratio 1:m0 of the slope spillway section 2 is 1:3.4, and the thickness d is 1 meter.

[0068] The tooth groove section 3 comprises an inverse slope and a horizontally arranged groove bottom horizontal section, the slope ratio 1:m of the inverse slope is 1:1, the vertical thickness D of the groove bottom horizontal section is 2.1 meters, and the horizontal length B of the groove bottom horizontal section is 0.8 meters.

[0069] The concrete strength grade of the bottom plate 6 and the side wall 7 is C30, the concrete strength grade of the concrete cushion layer 4 is C20, and the thickness is 0.1 meter.

[0070] The surface of the concrete cushion layer 4 is slightly exposed to coarse sand.

[0071] The thickness d1 of the gravel cushion layer 5 is 0.15 meters, and the material classification is gravel.

[0072] Example 5

[0073] The spillway structure for the spillway of the overflow dam comprises a bottom plate 6, vertical side walls 7 fixed on both sides of the bottom plate 6, a horizontal stop sliding spillway section 1, a slope spillway section 2 and a tooth groove section 3 arranged in sequence on the lower surface of the bottom plate 6, the upper surface of the bottom plate 6 is parallel to the slope spillway section 2, and the bottom plate 6 is sequentially laid with a concrete cushion layer 4 and a gravel cushion layer 5 from top to bottom.

[0074] The horizontal stop sliding spillway section 1 is arranged horizontally, and the horizontal length L1 thereof is 3.5 meters, the horizontal length L2 of the slope spillway section 2 is 8.5 meters, and the horizontal length L3 of the tooth groove section 3 is 2.1 meters, that is, the total length L of the single-section spillway is 14 meters.

[0075] The slope ratio 1:m0 of the slope spillway section 2 is 1:3.4, and the thickness d is 1 meter.

[0076] The tooth groove section 3 comprises an inverse slope and a horizontally arranged groove bottom horizontal section, the slope ratio 1:m of the inverse slope is 1:0.9, the vertical thickness D of the groove bottom horizontal section is 2.3 meters, and the horizontal length B of the groove bottom horizontal section is 0.9 meters.

[0077] The concrete strength grade of the bottom plate 6 and the side wall 7 is C30, the concrete strength grade of the concrete cushion layer 4 is C20, and the thickness is 0.1 meter.

[0078] The surface of the concrete cushion layer 4 is slightly exposed to coarse sand.

[0079] The thickness d1 of the gravel cushion layer 5 is 0.15 meters, and the material classification is gravel.

[0080] Embodiment 6

[0081] The overflow spillway structure for soil base comprises a bottom plate 6, vertical side walls 7 fixed on both sides of the bottom plate 6, a horizontal anti-skid spillway section 1, an inclined spillway section 2 and a tooth groove section 3 arranged in sequence on the lower surface of the bottom plate 6, and the upper surface of the bottom plate 6 is parallel to the inclined spillway section 2, and the bottom plate 6 is sequentially laid with a concrete cushion layer 4 and a gravel cushion layer 5 from top to bottom.

[0082] The horizontal anti-skid spillway section 1 is arranged in horizontal direction, and the horizontal length L1 thereof is 4 meters, the horizontal length L2 of the inclined spillway section 2 is 9 meters, and the horizontal length L3 of the tooth groove section 3 is 2.2 meters, that is, the total length L of the single spillway is 15.2 meters.

[0083] The slope ratio 1:m0 of the inclined spillway section 2 is 1:3.8, and the thickness d is 1 meter.

[0084] The tooth groove section 3 comprises an inverted slope and a horizontally arranged groove bottom horizontal section, the slope ratio 1:m of the inverted slope is 1:0.8, the vertical thickness D of the groove bottom horizontal section is 2.5 meters, and the horizontal length B of the groove bottom horizontal section is 0.8 meters.

[0085] The concrete strength grade of the bottom plate 6 and the side wall 7 is C25, and the concrete strength grade of the concrete cushion layer 4 is C15, and the thickness is 0.1 meters.

[0086] The surface of the concrete cushion layer 4 is slightly exposed to coarse sand.

[0087] The thickness d1 of the gravel cushion layer 5 is 0.15 meters, and the material classification is gravel.

[0088] The concrete cushion layer 4 is provided with transverse drainage and longitudinal drainage, which are square pipes with side length equal to the length L3 of the tooth groove horizontal section.

[0089] The transverse drainage is located at the joint position of two independent spillway structures, and the length of each transverse drainage is not less than 80% of the internal width of the spillway and not more than the width of the bottom plate.

[0090] The longitudinal drainage is provided with two, which are respectively located at the positions of 1 / 5 and 4 / 5 of the width direction of the lower end surface of the bottom plate.

Claims

1. A spillway chute structure for a soil foundation, characterized by, The utility model relates to a kind of concrete drainage structures, including bottom plate (6), vertical side wall (7) is fixed on both sides of bottom plate (6), the lower surface of the bottom plate (6) includes horizontal anti-skid gutter section (1) arranged in sequence, slope gutter section (2) and tooth groove section (3), the upper surface of the bottom plate (6) is parallel with slope gutter section (2), the bottom of the bottom plate (6) is sequentially laid with concrete cushion (4) and broken stone cushion (5) from top to bottom.

2. The spillway chute structure for earth base according to claim 1, characterized by, The horizontal anti-skid gutter section (1) is arranged in horizontal direction, and the horizontal direction length thereof is L1, the horizontal direction length of the slope gutter section (2) is L2, the horizontal direction length of the tooth groove section (3) is L3, and L1+L2+L3=L, L is 10-20 meters.

3. The spillway chute structure for earth base according to claim 2, characterized in that, The L1 is 1 / 4L-1 / 3L, and L1 is not less than 3 meters.

4. The spillway chute structure for earth base according to claim 2, wherein The slope ratio of the slope gutter section (2) is 1:m0, m0 is 2.5-5, the thickness d of the slope gutter section (2) is 0.05L-0.1L, and d is not less than 1 meter.

5. The spillway chute structure for earth base according to claim 4, wherein, The tooth groove section (3) includes reverse slope and horizontally arranged groove bottom horizontal section.

6. The spillway chute structure for earth base according to claim 5, wherein The slope ratio of the reverse slope is 1:m, m is m0 / 4-m0 / 3.

7. The spillway chute structure for earth base according to claim 5, wherein The vertical direction thickness D of the groove bottom horizontal section is 2d-3d, and D is not less than 2 meters; the length B of the groove bottom horizontal section is 0.5d-0.5D.

8. The spillway chute structure for earth base according to claim 1, wherein The concrete strength grade C0 of the bottom plate (6) and side wall (7) is C25-C35; the concrete strength grade C of the concrete cushion (4) is C0-10, and the thickness is 0.1 meter.

9. The spillway chute structure for earth base according to claim 8, wherein The surface of the concrete cushion (4) is slightly exposed to coarse sand.

10. The spillway chute structure for earth base according to claim 4, wherein The thickness d1 of the broken stone cushion (5) is 0.15d, and the material classification is broken stone.

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