A semicircular rotating gate well for underground reservoir

Abstract

The present invention relates to a semicircular rotary gate well of an underground reservoir, characterized in that the semicircular rotary gate well of the underground reservoir is composed of a cement grouting dam body (1), a clay well (2) and a rotary gate well (3), clay wells (2) are arranged at a certain interval in the middle of the cement grouting dam bodies (1) on both sides, gate wells (3) are arranged at the intervals between the clay wells (2), a semicircular rotary gate (4) is arranged in the gate well (3), and circular arc surfaces (8) are arranged on the clay wells (2) on both sides of the semicircular rotary gate (4), the circular arc surfaces (8) are matched with the semicircular rotary gate (4), and the semicircular rotary gate (4) can rotate along the circular arc surfaces (8). The present invention can effectively intercept and store underground water in the reservoir area, and if the water in the reservoir area needs to be discharged, the purpose can be achieved through the gate well control.

Description

Technical Field

[0001] The present invention belongs to the field of hydrogeology and groundwater science, and in particular to a semicircular rotating gate well of an underground reservoir. The underground reservoir is an important water conservancy project measure in the field of hydrogeology and groundwater resources. Although the traditional underground reservoir dam body can play an effective role in intercepting and intercepting flow, forming an underground reservoir in front of the dam, once the dam body is built, a permanent impermeable wall will be formed. If the water body in the underground reservoir is polluted, etc., an underground reservoir gate that can be manually controlled is needed to simultaneously ensure the water quantity and water quality of the underground reservoir water body. Background Art

[0002] According to the construction form, underground reservoirs can be divided into three types: dammed, damless and mixed. In the case of water storage structures without complete impermeable boundaries, it is necessary to build an underground dam body to intercept underground runoff as the impermeable boundary of the underground reservoir, preventing the leakage of underground runoff in the underground reservoir area and the invasion of underground runoff outside the reservoir area (such as seawater intrusion). As an underground project, the main construction methods of underground dam bodies in the early days were: open excavation construction method, steel sheet pile method, pile arrangement method, etc. In 1976, Japan proposed the SMW method continuous wall technology, which was widely used in countries around the world. This method uses a special multi-axis mixing on-site drilling to cut the soil body, and at the same time injects cement slurry into the soil body at the end of the drill bit. After sufficient mixing and mixing, H-shaped steel is inserted into the mixing pile body before the cement soil mixture is consolidated to form a continuous underground wall with certain strength and rigidity, continuous and seamless. However, experience shows that about 20% of the wellbore ratios of wells with a depth of more than 40m need to be adjusted. The greater the depth, the greater the wellbore ratio that needs to be adjusted. In my country, high-pressure jet grouting technology is widely used. A grouting pipe equipped with a special alloy nozzle is lowered to a predetermined position by drilling a hole, and the mud liquid is sprayed out by a high-pressure mud pump, so that the soil particles are stirred and mixed with the mud liquid under the action of the jet flow to form a consolidated body. The continuous dam body formed by the above method can effectively control the hydraulic connection inside and outside the reservoir area. The present invention proposes a design scheme for underground reservoir gates. On the basis of effectively intercepting and storing underground water in the reservoir area, if the water in the reservoir area needs to be discharged, the purpose can be achieved through gate well control. Summary of the invention

[0003] At present, traditional underground dam bodies mostly adopt grouting curtains, damming and other methods to cut off underground undercurrents. Once the dam body is built, it forms a permanent impermeable boundary of the underground reservoir, which can effectively store groundwater resources. However, in addition to the amount of water, environmental factors are also the key to determining whether the underground reservoir is beneficial or not. On the one hand, once the water body in the reservoir area is polluted and cannot be effectively controlled, the polluted underground reservoir loses its meaning. On the other hand, if the water level is too high after the underground reservoir is built, it will also have an adverse effect on the growth of organisms in the reservoir area. Taking the above problems into consideration, the present invention proposes a semi-circular rotary gate well of an underground reservoir with strong operability. The technical solution adopted to realize the present invention is: a semi-circular rotary gate well of an underground reservoir, which is composed of a cement grouting dam body, a clay well and a rotary gate well. The cement grouting dam body is formed by high-pressure jet grouting at both ends through the grouting well at a certain angle (to ensure the continuity of the dam body between the grouting wells), and an underground dam body is formed between the grouting wells. Clay wells are set at certain intervals in the middle of the cement grouting dam bodies on both sides. The clay well is a well in which clay is injected to the wellhead, so that the permeable sand layer in the original stratum in the well is replaced by clay, which fully plays a water-isolating effect. A permeable sand layer section is still provided on the wall of the clay well 2, but at this time, water can pass through the intervals between the clay wells. A gate well is set between the clay wells, and a semi-circular rotary gate is set in the gate well. The clay wells on both sides of the semi-circular rotary gate are relatively provided with arc surfaces, which coincide with the semi-circular rotary gate, and the semi-circular rotary gate can rotate along the arc surface.

[0004] The present invention proposes a design scheme for underground reservoir gates. On the basis of effectively intercepting and storing underground water in the reservoir area, if the water in the reservoir area needs to be discharged, the purpose can be achieved through gate well control. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is the plan layout diagram of the underground reservoir gate of the present invention;

[0006] Figure 2 It is a schematic diagram of the plan layout of the clay well of the present invention;

[0007] Figure 3 It is a cross-sectional view of the working principle of the gate well of the present invention;

[0008] Figure 4 It is a cross-sectional view of the working principle of the gate well in the water flow direction of the present invention in a closed state;

[0009] Figure 5 It is a cross-sectional view of the working principle of the gate well in the water flow direction of the present invention when it is open.

[0010] In the figure, 1. cement grouting dam body, 2. clay well, 3. rotary gate well, 4. semi-circular rotary gate, 5. clay, 6. direction of water inflow, 7. grouting well, 8. arc surface, 9. permeable sand layer section. DETAILED DESCRIPTION

[0011] Referring to the attached drawings, a semicircular rotary gate well of an underground reservoir is composed of a cement grouting dam body 1, a clay well 2 and a rotary gate well 3. The cement grouting dam body 1 is formed by high-pressure jet grouting at both ends through a grouting well 7 at a certain angle, and an underground cement grouting dam body 1 is formed between each grouting well 7. In the middle of the cement grouting dam bodies 1 on both sides, clay wells 2 are arranged at a certain interval. The clay well 2 is a well into which clay 5 is injected to the wellhead, so that the permeable sand layer in the original stratum in the well is filled. It is replaced by clay 5, which fully plays a water-proof effect. A permeable sand layer section 9 is still provided on the wall of the clay well 2, but at this time, water can pass through the intervals between the clay wells 2. A gate well 3 is set at the intervals between the clay wells 2, and a semi-circular rotary gate 4 is set in the gate well 3. The clay wells 2 on both sides of the semi-circular rotary gate 4 are relatively provided with arc surfaces 8, the arc surfaces 8 are consistent with the semi-circular rotary gate 4, and the semi-circular rotary gate 4 can rotate along the arc surfaces 8.

[0012] The present invention is to carry out high-pressure jet grouting at both ends of the proposed dam site through grouting wells 7 at a certain angle (to ensure the continuity of the dam body between the grouting wells), and form a cement grouting dam body 1, that is, an impermeable wall, between the grouting wells 7, which serves as the water-proof boundary of the underground reservoir and effectively prevents the hydraulic connection between the inside and outside of the underground reservoir. In the middle of the cement grouting dam bodies 1 at both ends, according to actual conditions, a part of the space is reserved as the main part of the gate. It mainly includes two parts. The first is the clay well 2, which is drilled and formed at a certain interval. By injecting clay into the well to the wellhead, the permeable sand layer in the original stratum is replaced by clay, which fully plays a waterproof effect. However, at this time, water can pass through the intervals between the clay wells. The second part is to set a gate well 3 between the clay wells 2. The cross-sectional diagram of the working principle of the gate well 3 is shown in the figure Figure 3 As shown, 4 is a semicircular rotating gate, 5 represents the position of the sand layer replaced by clay, 6 represents the direction of water flow inflow, and 9 is a permeable sand layer section. Figure 4 , Figure 5 This is a cross-sectional diagram of the working principle of the gate well in different states of closing and opening in the water flow direction. Figure 4 , Figure 5 The number 2 in the middle is a clay well and the number 4 is a semicircular rotating gate.

[0013] The working principle of the present invention is as follows:

[0014] A semicircular steel gate 4 with a rotating function is placed in the permeable sand layer in the well. When the gate is closed, Figure 4As shown, the semicircular rotating gate 4 rotates to the water-bearing sand layer position, so that it closes the sand layer section in the gate well 3. The permeable sand layer is closed by the semicircular gate 4, successfully blocking the hydraulic connection between the water bodies inside and outside the underground reservoir area. Figure 5 As shown, when the semicircular rotating gate 4 rotates to the clay wells on both sides, the semicircular rotating gate 4 opens the connecting channel, and the water bodies inside and outside the underground reservoir area are hydraulically connected. 6 indicates the direction of groundwater flow. Because there may be a certain distance between the wells, there will be very little water flow, but it is not enough to affect the water volume and water quality requirements of the underground reservoir.

Claims

1. A semicircular rotary gate well of an underground reservoir, characterized in that: The semicircular rotary gate well of the underground reservoir is composed of a cement grouting dam body (1), a clay well (2) and a rotary gate well (3). The cement grouting dam body (1) is formed by high-pressure jet grouting at a certain angle to both ends through the grouting well (7), and an underground cement grouting dam body (1) is formed between the grouting wells (7). Clay wells (2) are arranged at certain intervals between the cement grouting dam bodies (1) on both sides. Clay (5) is injected into the clay well (2) to the wellhead, so that the permeable sand layer in the original stratum in the well is replaced by the clay (5), so as to fully play a water-isolating effect. The wall of the clay well (2) is still provided with a permeable sand layer section (9). In each clay well ( A gate well (3) is arranged at the interval between the two sides of the gate well (3), a semi-circular rotating gate (4) with a rotating function is placed in the permeable sand layer position in the gate well (3), and arc surfaces (8) are arranged on the clay wells (2) on both sides of the semi-circular rotating gate (4) in a relative manner, the arc surfaces (8) coincide with the semi-circular rotating gate (4), and the semi-circular rotating gate (4) can rotate along the arc surfaces (8). When the gate is closed, the semi-circular rotating gate (4) rotates to the water-bearing sand layer position to close the sand layer section in the gate well (3), and the permeable sand layer is closed by the semi-circular rotating gate (4), thereby successfully blocking the hydraulic connection between the water bodies inside and outside the underground reservoir area; the semi-circular rotating gate (4) is made of steel plate.

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