CN107761668B - Coastal shore reservoir land-building type revetment structure and construction method thereof - Google Patents
Coastal shore reservoir land-building type revetment structure and construction method thereof Download PDFInfo
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- CN107761668B CN107761668B CN201710979077.1A CN201710979077A CN107761668B CN 107761668 B CN107761668 B CN 107761668B CN 201710979077 A CN201710979077 A CN 201710979077A CN 107761668 B CN107761668 B CN 107761668B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
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- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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Abstract
The invention provides a coastal shore reservoir land-building type revetment structure, which comprises a filling interface step arranged along the slope of a revetment foundation, a permeable filling layer covered on the filling interface step, and an impermeable filling layer covered on the permeable filling layer; the impermeable filling layer is arranged into a multi-stage step structure from bottom to top along the revetment foundation slope, and a permeable filling layer is also arranged at the whole bottom of each stage of impermeable filling layer step; impermeable geotextiles are arranged between the permeable filling layer and the impermeable filling layer; the permeable filling layer is formed by filling sand gravel, and the impermeable filling layer is formed by filling cohesive soil bodies in a layered mode. The invention forms a filling structure which can ensure the stability of the shore slope of the coastal beach and add new land at the same time, effectively protects the geological environment of the shore beach zone and promotes the development and utilization of the land resources of the shore slope.
Description
Technical Field
The invention relates to the field of shore protection design and construction of a shore reservoir, in particular to a coastal shore reservoir land-building type shore protection structure and a construction method thereof.
Background
In the last three decades, a large number of large-scale and extra-large-scale reservoirs are built in order to develop hydropower resources vigorously and give consideration to flood control requirements and regional water resource allocation. According to incomplete statistics, 80-90% of reservoir landslides are related to reservoir water activities, and bank slope damage is related to both bank slope material structures and reservoir ocean water level changes. According to preliminary statistics, the shore reservoir of China gathers a large number of town sets, for example, 60 town sets such as Badong, Ziguo, Yichang, Wushan, Fengjie, Kaizhou, Yunyang, Wanzhou, Zhongxian and Fengdu in the three gorge area are located in the shore reservoir zone, and the number of residents exceeds 1000 ten thousand. As a geological disaster high-incidence area, the foundation construction of the coastal shore reservoir city and the bank slope geological disaster control must be highly integrated and coordinately developed.
The slope type bank protection structure is characterized in that building materials or components are directly paved on a dike or a beach waterside slope surface to form a continuous covering layer, so that erosion and scouring of water flow and wind waves are prevented. The protection form is arranged along the water flow direction, has little influence on the water flow and does not influence shipping, so the protection form is widely adopted. The river conditions of the middle and lower reaches of the Yangtze river in China are relatively stable, and slope type revetments are widely adopted in water depth and flow emergency places, dangerous embankment sections, important cities and port wharfs. However, in order to control the flood protection safety of the river and the coastal reservoir, the slope type bank protection structure in the prior art focuses on applying the structural design of hard materials such as rock block, concrete and the like, so that the hardening phenomenon of the bank protection is serious, the hardened bank protection structure destroys the relation between the riverbed and the ecological system of the bank, cuts off the contact of organisms and microorganisms in the water and the land, and simultaneously, the hardened bank enables aquatic plants not to grow, thereby seriously affecting the ecological system of the coastal reservoir; in addition, conventional hard revetment structures may also cause diversion of scour and erosion problems, reducing the ability of coastal rivers to cut water energy, causing more severe erosion downstream.
The engineering construction of bank slope protection engineering design from the geological disaster management perspective is the only technical path at present for geological disaster prevention and control of bank slopes at home and abroad with the aim of stability and safety of the bank slopes in the engineering management area, but the land resource development and utilization in the management area cannot be met due to the management engineering, and even a plurality of adverse factors are brought to the subsequent urban infrastructure construction. In other words, the integration of the geological disaster treatment of the shore bank slope of the coastal shore reservoir and the development and utilization of the land resources has important practical significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a coastal shore reservoir land-building type revetment structure and a construction method thereof to form a filling structure which ensures the stability of a shore slope of a coastal shore reservoir and generates newly-added land with the area of 'Bx revetment engineering length'.
In order to achieve the aim, the invention provides a coastal shore reservoir land-building type revetment structure, which is characterized in that: the water-permeable embankment foundation comprises a embankment interface step arranged along a revetment foundation slope, a water-permeable embankment layer covered on the embankment interface step and a water-impermeable embankment layer covered on the water-permeable embankment layer; the impermeable filling layer is arranged into a multi-stage step structure from bottom to top along the revetment foundation slope, and a permeable filling layer is also arranged at the whole bottom of each stage of impermeable filling layer step; impermeable geotextiles are arranged between the permeable filling layer and the impermeable filling layer; the permeable filling layer is formed by filling sand gravel, and the impermeable filling layer is formed by filling cohesive soil bodies in a layered mode.
Further, the slope angle theta of the filling interface step is 30 degrees, the width of the step flat disc is 100cm, a drain hole is formed in the slope surface of the filling interface step, and the included angle between the drain hole and the slope bottom line of the step is 10-30 degrees.
Furthermore, the permeable filling layer is formed by filling and compacting sand gravel, and the degree of compaction is not less than 85%.
Furthermore, the impervious soil filling layer is formed by filling and compacting the viscous soil in layers, the layering thickness is 20-30cm, and the compaction degree is not less than 85%.
Further, the height h of the step of the impermeable soil filling layer is 500cm for 300-year sand, the width a of the flat disc of the step is 200cm, and the width B of the flat disc at the upper part of the last step from bottom to top along the slope surface of the revetment foundation is 600cm for 300-year sand.
Furthermore, the thickness of the permeable filling layer at the bottom of each level of impermeable filling layer step is 30-50 cm.
The anchor system comprises an anchor rod and anchor rod grid hooks, wherein the anchor rod is fixed on the step slope of the impervious soil filling layer at the lower part of the revetment foundation slope, and the anchor rod is anchored in the soil body of the bank slope; the anchor rod lattice hooks are hooked on the slope surface of the steps of the impervious soil filling layer to form stable connection of the anchor rod and the slope surface of the steps of the impervious soil filling layer.
Another object of the present invention is to provide a method for constructing a shore structure for shore construction, which comprises the following steps:
a. determining a building part of the shore protection structure according to geological and landform conditions of a shore reservoir;
b. excavating a filling interface step along a revetment foundation slope surface at a building part, arranging a drain hole on the slope surface of the step, covering a permeable filling layer on the filling interface step, and filling and compacting the permeable filling layer by adopting sand gravel according to the national relevant technical standard, wherein the compaction degree is not less than 85%;
c. laying impermeable geotextile on the surface of the permeable filling layer, filling an impermeable filling layer on the impermeable geotextile, wherein the impermeable filling layer is formed by filling viscous soil in a layered manner, a step structure is arranged along the slope surface of the revetment foundation from bottom to top, and the permeable filling layer is also arranged at the whole bottom of the step of each level of impermeable filling layer;
d. and arranging an anchoring system on the impermeable filling layer slope surface at the lower part of the revetment foundation slope surface to anchor the impermeable filling layer.
Based on the technical scheme, the invention has the advantages that:
the invention is composed of a filling interface step, a permeable filling layer, a impermeable filling layer and an anchoring system, and forms a filling structure which ensures the stability of a shore bank slope of a coastal shore reservoir and simultaneously generates newly added land with the area of 'Bxrevetment engineering length'. The invention is provided with a filling interface step and a drain hole on the slope surface of the step, a permeable filling layer is covered on an excavation area of the filling interface step, the permeable filling layer adopts sand gravel to backfill and compact the excavation area of the filling interface step, the problem of low bonding strength between an earth-making type filling structure and an original slope surface of a bank slope is solved, the earth-making type filling body is set into the permeable filling layer and an impermeable filling layer, and the permeable filling layer is backfilled and covered on the interface step, the problem of synchronous drainage of the bank slope in the reservoir water level falling process is solved, the adverse effect of underground water infiltration on the stability of the filling structure is eliminated, an anchoring system is arranged on the impermeable filling layer slope surface on the lower part of the bank protection base slope surface to anchor the impermeable filling layer, and the problem of integral stability of the filling bank slope is solved.
The invention provides a filling structure which can not only ensure the stability of a bank slope of a coastal shore reservoir, but also increase the newly added land. Compared with the traditional bank protection structure, the invention not only can effectively protect the stability of the bank slope of the coastal bank, but also can well protect the geological environment of the coastal bank and promote the development and utilization of the land resources of the bank slope.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are needed in the embodiments or the prior art descriptions will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of the present invention;
in the drawings: 1-bank slope soil body; 2-bank protection foundation slope; 3-bank slope potential failure surface; 4-a fill interface step; 5-a drain hole; 6-impermeable soil filling layer; 7-water permeable filling; 8-traditional revetment slope; 9-anchor bar grid hook; 10-anchor rod; 11-impermeable geotextile; 12-low water level; 13-high water level.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
In the present embodiment, the terms "upper", "lower", "left", "right", "front", "rear", "upper end", "lower end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, the invention provides a coastal shore reservoir land reclamation type revetment structure, which comprises a filling interface step 4 arranged along a revetment foundation slope 2, a permeable filling layer 7 covering the filling interface step 4, and a impermeable filling layer 6 covering the permeable filling layer 7; the impermeable filling layer 6 is arranged into a multi-stage step structure from bottom to top along the revetment foundation slope 2, and a permeable filling layer 7 is also arranged at the whole bottom of each stage of impermeable filling layer step; impermeable geotextiles 11 are arranged between the permeable filling layer and the impermeable filling layer; the permeable filling layer 7 is formed by filling sand gravel, and the impermeable filling layer 6 is formed by filling viscous soil in layers.
Further, the slope angle theta of the step 4 of the filling interface is 30 degrees, the width of the step flat disc is 100cm, a drain hole 5 is arranged on the slope surface of the step of the filling interface, and the included angle between the drain hole 5 and the slope bottom line of the step is 10-30 degrees.
Further, the permeable soil filling layer 7 is formed by filling and compacting sand gravel, and the degree of compaction is not less than 85%.
Further, the impermeable soil filling layer 6 is formed by filling and compacting viscous soil in layers, the layering thickness is 20-30cm, and the compaction degree is not less than 85%.
Further, the height h of the step of the impermeable soil filling layer is 300-500cm, the width a of the flat disc of the step is 200cm, and the width of the upper flat disc of the last step from bottom to top along the slope surface of the revetment foundation is B.
Furthermore, the thickness of the permeable filling layer at the bottom of each level of impermeable filling layer step is 30-50 cm.
Further, the shore reservoir land reclamation type revetment structure further comprises an anchoring system, wherein the anchoring system comprises an anchor rod 10 and an anchor rod grid hook 9, the anchor rod 10 is fixed on the impervious soil filling layer step slope surface at the lower part of the revetment foundation slope surface 2, and the anchor rod is anchored in the bank slope soil body 1; the anchor rod lattice hooks are hooked on the slope surface of the steps of the impervious soil filling layer to form stable connection of the anchor rod and the slope surface of the steps of the impervious soil filling layer.
Example 2
The invention also provides a method for building the shore structure for the land reclamation type shore protection of the shore reservoir, which comprises the following steps:
a. and determining the building position of the shore protection structure according to the geological and landform conditions of the shore reservoir.
b. Excavating a filling interface step along a revetment foundation slope surface at a building part, arranging drain holes on the slope surface of the step, covering the filling interface step with a permeable filling layer, and filling and compacting the permeable filling layer by adopting sand gravel according to the national relevant technical standard, wherein the compaction degree is not less than 85%.
c. And paving impermeable geotextile on the surface of the permeable filling layer, filling an impermeable filling layer on the impermeable geotextile, wherein the impermeable filling layer is formed by filling viscous soil bodies in a layered manner, a step structure is arranged along the slope surface of the revetment foundation from bottom to top, and the permeable filling layer is also arranged at the whole bottom of the step of each level of impermeable filling layer.
Specifically, the land building type step is built from bottom to top step by step along the slope surface of the revetment foundation: adopting sand gravel backfilling to compact the soil filling interface step → covering a layer of sand gravel and the backfilled sand gravel to be integrated together → covering a layer of sand gravel at the bottom of the step of the impermeable soil filling layer → paving impermeable geotextile on the surface of the sand gravel layer → filling the impermeable soil filling layer by layers by using cohesive soil.
d. And arranging an anchoring system on the impermeable filling layer slope surface at the lower part of the revetment foundation slope surface to anchor the impermeable filling layer.
The invention is composed of a filling interface step 4, a permeable filling layer 7, a impermeable filling layer 6 and an anchoring system, and forms a filling structure which ensures the stability of a shore slope of a coastal bank and simultaneously generates newly-added land with the area of 'Bxrevetment engineering length'. The method is provided with a filling interface step 4, a water drain hole 5 is arranged on the slope surface of the step, a permeable filling layer 7 covers the excavation area of the filling interface step, and the permeable filling layer adopts sand gravel to backfill and compact the excavation area of the filling interface step, so that the problem of low bonding strength between a land-building type filling structure and the original slope surface of the bank slope is solved; the filling body of the land-building type is set into a permeable filling layer 7 and an impermeable filling layer 6, and the permeable filling layer 7 is filled back to cover the filling interface step 4, so that the problem of synchronous bank slope drainage in the reservoir water level falling process is solved, and the adverse effect of the underground water permeability on the stability of the filling structure is eliminated; and an anchoring system is arranged on the surface of the impermeable filling layer 6 at the lower part of the revetment foundation slope surface 2 to anchor the impermeable filling layer, so that the problem of integral stability of the filled bank slope is solved.
As shown in fig. 1, if a conventional revetment slope 8 is adopted, the revetment structure cannot be added with new land; and the alternating change of the low water level 12 and the high water level 13 of the reservoir (the change of the water level of the reservoir) easily causes the erosion and the scouring of the traditional bank protection slope line 8, and the bank slope potential damage surface 3 is easily damaged. Compared with the traditional bank protection structure, the invention provides the filling structure which can not only ensure the stability of the bank slope of the coastal bank, but also increase the additional land. The method can effectively protect the stability of the bank slope of the coastal bank, well protect the geological environment of the coastal bank and promote the development and utilization of the land resources of the bank slope.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.
Claims (7)
1. The utility model provides a coastal shore storehouse type shore protection structure of making land which characterized in that: the water-permeable embankment foundation comprises a embankment interface step arranged along a revetment foundation slope, a water-permeable embankment layer covered on the embankment interface step and a water-impermeable embankment layer covered on the water-permeable embankment layer; the impermeable filling layer is arranged into a multi-stage step structure from bottom to top along the revetment foundation slope, and a permeable filling layer is also arranged at the whole bottom of each stage of impermeable filling layer step; impermeable geotextiles are arranged between the permeable filling layer and the impermeable filling layer; the permeable filling layer is formed by filling sand gravel, and the impermeable filling layer is formed by filling viscous soil in layers;
the anchoring system comprises an anchor rod and anchor rod grid hooks, wherein the anchor rod is fixed on the step slope surface of the impervious soil filling layer at the lower part of the revetment foundation slope surface and is anchored in the soil body of the bank slope; the anchor rod lattice hooks are hooked on the slope surface of the steps of the impervious soil filling layer to form stable connection of the anchor rod and the slope surface of the steps of the impervious soil filling layer.
2. The coastal shore reservoir land reclamation type revetment structure of claim 1, wherein: the slope angle theta of the filling interface step is 30 degrees, the width of the step flat disc is 100cm, a drain hole is arranged on the slope surface of the filling interface step, and the included angle between the drain hole and the slope bottom line of the step is 10-30 degrees.
3. The coastal shore reservoir land reclamation type revetment structure of claim 1, wherein: the permeable filling layer is formed by filling and compacting sand gravel, and the degree of compaction is not less than 85%.
4. The coastal shore reservoir land reclamation type revetment structure of claim 1, wherein: the impervious soil filling layer is formed by filling and compacting cohesive soil bodies in layers, the layering thickness is 20-30cm, and the compaction degree is not less than 85%.
5. The coastal shore reservoir land reclamation type revetment structure of claim 1, wherein: the height h of the steps of the impermeable soil filling layer is 500cm for 300-.
6. The coastal shore reservoir land reclamation type revetment structure of claim 1, wherein: the thickness c of the permeable filling layer at the bottom of each level of impermeable filling layer step is 30-50 cm.
7. A method of constructing the coastal shore structure according to any one of claims 1 to 6, comprising the steps of:
a. determining a building part of the shore protection structure according to geological and landform conditions of a shore reservoir;
b. excavating a filling interface step along a revetment foundation slope surface at a building part, arranging a drain hole on the slope surface of the step, covering a permeable filling layer on the filling interface step, and filling and compacting the permeable filling layer by adopting sand gravel according to the national relevant technical standard, wherein the compaction degree is not less than 85%;
c. laying impermeable geotextile on the surface of the permeable filling layer, filling an impermeable filling layer on the impermeable geotextile, wherein the impermeable filling layer is formed by filling viscous soil in a layered manner, a step structure is arranged along the slope surface of the revetment foundation from bottom to top, and the permeable filling layer is also arranged at the whole bottom of the step of each level of impermeable filling layer;
d. and arranging an anchoring system on the impermeable filling layer slope surface at the lower part of the revetment foundation slope surface to anchor the impermeable filling layer.
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| CN108399305B (en) * | 2018-03-12 | 2021-06-29 | 自然资源部第三海洋研究所 | Design method for maintenance of beach on exposed bank section with strong erosion |
| CN109315183B (en) * | 2018-11-08 | 2023-12-05 | 北京场道市政工程集团有限公司 | Garden engineering slope greening structure |
| CN110656775B (en) * | 2019-09-15 | 2021-07-30 | 义乌市高洋建筑工程有限公司 | Special cast-in-place concrete separator for CL |
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