A process for reinforcing the slope of water conservancy flood storage

Abstract

The invention provides a process method for reinforcement construction of a water conservancy flood storage slope, which relates to the technical field of water conservancy engineering. The process comprises the following steps: cleaning the slope: first, cleaning the surface of the slope to remove stones, weeds and obstacles that hinder the reinforcement of the slope; digging a drainage ditch: arranging a drainage ditch outwards in a direction perpendicular to the slope at a distance of 1-1.5m from the outer edge of the slope, the drainage ditch has a depth of 80-100mm, and a cover plate is arranged on the upper surface of the drainage ditch along the direction of the drainage ditch; the drainage pipe is arranged with a depth of 60-80mm, an inner diameter of the drainage pipe is 35mm, and a spacing between the drainage pipes is 50-70cm; laying a water diversion geotextile: laying the water diversion geotextile after completion, flattening the water diversion geotextile, and then compacting it to make the water diversion geotextile compact; before the slope protective layer is solidified, pre-grouting is first performed through a grouting hole to fill the gaps between the slope soil particles, and then spraying concrete is performed after the geotextile is laid, so as to further improve the connection strength and extend the service life of the slope protective layer.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to a process method for reinforcing a water conservancy flood storage slope. Background Art

[0002] Floods have great impact and destructive power. When floods come, they impact and destroy water conservancy facilities such as river embankments and reservoirs, and may threaten the lives and property of the people.

[0003] Experience and research on flood control and rescue of water conservancy projects have shown that the damage of embankments and embankment slopes is a local phenomenon within a limited range, a local damage, or even two or three points, rather than a continuous overall damage. When these local points are damaged, it is often a weak link that triggers sliding, forming a domino effect.

[0004] Protecting and reinforcing the slopes of embankments in rivers or reservoir dams is an effective measure to deal with floods. Setting up an interception and protection layer on the slopes of river or reservoir embankments can effectively prevent or mitigate the impact of floods and avoid accidents such as dam damage and collapse caused by floods.

[0005] Traditional slope reinforcement techniques include: cement soil gravity, riprap, gabion mesh engineering, concrete slab engineering, etc.

[0006] However, the traditional slope reinforcement technology of water conservancy projects has limited reinforcement effect on the slope. Under the long-term erosion and scouring of floods, the slope protection layer of the dam is damaged and collapsed, resulting in the failure of the overall protection function of the dam.

[0007] In the actual construction process, it is necessary to reinforce and protect the slope according to the specific conditions of the slope, and it is necessary to make adjustments according to the actual situation. Concrete anchor rods, anchor cables, lattices, mesh structures, cantilever beams, cantilevers, plate rib beams, rib columns and other structures are combined to form a structural system, thereby improving the protection level of the slope to achieve better protection effects. However, this not only makes construction difficult, the construction period is long, the cost is high, but the protection effect is also poor. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention provides a process method for water conservancy flood storage slope reinforcement construction to solve the following shortcomings mentioned in the above background technology:

[0009] The traditional slope reinforcement technology of water conservancy projects has limited effect on the reinforcement of slopes. Under the long-term erosion and scouring of floods, the slope protection layer of the dam is easily damaged and collapsed, resulting in the failure of the overall protection function of the dam. In the actual construction process, it is necessary to reinforce the slope according to the specific conditions of the slope. The structure used for adjustment is complex, difficult to construct, long construction period, high cost, and poor protection effect.

[0010] In the first aspect of the present disclosure, the present patent provides a process method for reinforcing the slope of a water conservancy flood storage. Before the slope protective layer is solidified, pre-grouting is first performed through the grouting holes to fill the gaps between the slope soil particles densely, and then the geotextile is laid and then the concrete is sprayed, so that the formed protective layer is connected as a whole. When pouring concrete, the slope surface is fully sprayed through the spraying pipe and the spraying port, so that there are no cavities inside the protective layer, which further improves the connection strength and prolongs the service life of the slope protective layer. Specifically, the following steps are included:

[0011] Step 1: Clean the slope: First, clean the surface of the slope to remove stones, weeds and obstacles that may hinder slope reinforcement;

[0012] Step 2: Dig drainage ditches: Set drainage ditches 1-1.5m away from the outer edge of the slope in the direction perpendicular to the slope. The depth of the drainage ditch is 80-100mm, and a cover plate is set on the upper surface of the drainage ditch along the direction of the drainage ditch;

[0013] Step 3: Drain pipe installation: Drain pipes are installed at equal intervals in the drainage ditch. The depth of the drain pipes is 60-80 mm, the inner diameter of the drain pipes is 35 mm, and the distance between the drain pipes is 50-70 cm.

[0014] Step 4: Laying the water diversion geotextile: After step 3, laying the water diversion geotextile, flattening the water diversion geotextile, and compacting it to make it tight;

[0015] Step 5: Laying geotextile: After step 4 is completed, laying geotextile on the surface of the water diversion geotextile, compacting the geotextile after laying, with a compactness of 50-80%, wherein after the geotextile in steps 4 and 5 is laid, a through hole is left above the drainage pipe, and the diameter of the through hole is less than 30 mm;

[0016] Step 6 Drain pipe sealing: After step 5 is completed, seal the holes above the drainage pipe on the geotextile;

[0017] Step 7: Bury the grouting pipe and the shotcrete pipe: After step 6, drill holes in the direction perpendicular to the slope on the surface of the water diversion geotextile, with a hole depth of 80-120 cm. The shotcrete pipe and the grouting pipe are both set above the water diversion geotextile and connected with the grouting pipe and the shotcrete pipe. The grouting pipe and the shotcrete pipe are set in parallel. The interval between the grouting pipes is 80-120 cm, and the interval between the shotcrete pipes is 80-120 cm. The grouting pipe and the shotcrete pipe are both PVC pipes with a diameter of 24 mm.

[0018] Step 8: Grouting of holes in the slope: connect the grouting pipe in step 7 to the pressure pump through the connecting pipe to grout the holes in the soil. While grouting, push the grouting pipe into the soil until the soil seeps out of the water. During grouting, the spraying pipe is in an open state.

[0019] Step 9: Grouting with a grouting pipe: under the action of pressure, the mortar is quickly sprayed from the grouting pipe to the slope surface, the spraying pressure is not less than 2.5Mpa, the spraying height is 2-3m, and the spraying thickness is 5-8cm;

[0020] Step 10: Re-spray concrete: After step 9, re-spray concrete after the concrete solidifies, and re-spray concrete before the concrete solidifies. The re-spraying thickness is 2-3cm.

[0021] Furthermore, during the grouting process of step 8, the mortar is sprayed from bottom to top, the slope surface is scanned during the grouting process, and supplementary grouting is performed on defective parts through the grouting holes.

[0022] Furthermore, in step 9, during the concrete curing process, thermoforming equipment and pressure equipment are used for thermoforming. The temperature of the thermoforming equipment is 20-25° C., and the pressure equipment applies pressure to the slope surface, and the pressure is not less than 3Mpa.

[0023] Furthermore, in step 5, the geotextile is laid with a through hole near the slope, the outer diameter of the through hole is less than 15 mm, and the inner diameter of the through hole is greater than the diameter of the drainage pipe and less than or equal to 60 mm.

[0024] Furthermore, in step 6, the material used for sealing is polyethylene foam sealing material. Before sealing, the area around the via hole is sealed with cement slurry. The width of the cement slurry is greater than 20 cm and the thickness is greater than or equal to 2 cm. After sealing, the cement slurry is used for leveling.

[0025] Furthermore, the slope surface in step 1 has an inclination, and a spray hole is set at the foot of the slope, and the diameter of the spray hole is 65 mm.

[0026] Furthermore, in step 7, the spraying pipe is greater than 3m away from the toe of the slope, a spraying port is provided on the spraying pipe, the diameter of the spraying port is smaller than the diameter of the spraying pipe, and the outer edge of the spraying port is trumpet-shaped and extends outward, and the diameter of the spraying pipe is less than 2cm.

[0027] Furthermore, in step 7, before grouting, the grouting pipe is connected to the pressure pump, and the pressure pump is used to perform trial grouting on the grouting pipe until cement slurry appears in the drainage ditch, thereby completing the trial grouting.

[0028] Furthermore, in step 1, the slope is cleaned manually, first cleaning the soil surface and then flattening the uneven slope surface with a shovel.

[0029] Furthermore, in step 2, the drainage ditch is dug manually. During the digging process, a shallow ditch with a depth of 20-30 mm is first dug perpendicular to the slope direction, and then the shallow ditch is filled and compacted with soil.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The slope reinforcement construction process provided by the present invention can strengthen the slope as a whole, so that after the reinforcement, the slope is tightly connected as a whole, has no voids, and has good overall strength.

[0032] 2. In the slope reinforcement construction process of the present invention, the slope is first cleaned to remove debris on the surface of the slope, and then a drainage ditch is excavated. The drainage ditch is excavated on the outer edge of the slope, and then a drainage pipe is set in the drainage ditch, and a water diversion geotextile and a geotextile are laid. Before the slope soil solidifies, grouting is performed through the holes in the slope to form pre-grouting on the slope, so that the interior of the slope soil is more solid, and the concrete loss during grouting can be reduced, thereby improving the grouting efficiency, improving the solidification effect of the slope soil, and making the slope more stable.

[0033] 3. In the slope reinforcement construction process of the present invention, after laying the water diversion geotextile and the geotextile, a through hole is set above the drainage pipe to facilitate grouting in the later stage, and it is sealed with a polyethylene foam sealing material before grouting. After the grouting is completed, it is leveled with cement slurry, and then a grouting hole connected with the grouting pipe and the spraying pipe is set above the water diversion geotextile. Before grouting, the grouting pipe is trial grouting by a pressure pump. During the trial grouting, the grouting pipe is always in a grouting state to ensure that the grouting pipe works normally. Then the drainage pipe is sealed and the slope is sprayed to form a concrete layer on the slope soil, and it is hot-formed by a hot forming equipment to ensure that there is no void inside the formed concrete layer. The concrete layer is sprayed again when it is not formed, so that the protective layer is more solid, which further increases the stability of the slope.

[0034] 4. In the slope reinforcement construction process of the present invention, a through hole is reserved above the drain pipe when the geotextile is laid to avoid grouting failure due to inaccurate position setting of the drain pipe, and the through hole is sealed with a sealing material before subsequent grouting. When the drain pipe is sealed, it is sealed with cement slurry to ensure the sealing effect. In addition, after laying the water diversion geotextile and the geotextile, a grouting hole is reserved above the water diversion geotextile, so that the subsequent grouting and spraying process is more convenient, and after the laying of the geotextile, the water diversion geotextile and the geotextile are compacted, so that the water diversion geotextile and the geotextile are tightly connected with the compacted soil, thereby improving the strength of the concrete after forming.

[0035] 5. The slope reinforcement construction process of the present invention is also provided with a slope foot hole, through which the concrete layer at the bottom of the slope is made more solid, so that the entire concrete layer forms a whole. At the same time, during the grouting process of the slope holes, the defective parts are re-grouted by scanning, so that there is no void on the contact surface between the entire concrete layer and the bottom of the slope, which further increases the overall strength of the slope and improves the flood resistance of the slope.

[0036] 6. The grouting process in the preparation method of the present invention is divided into two steps. First, grouting is performed on the holes of the slope to fill the gaps in the soil. Then, concrete is sprayed on the slope. Re-spraying is performed before the concrete solidifies, so that the interior of the formed concrete layer is more stable, and the slope is connected as a whole, thereby improving the stability and service life of the slope.

[0037] 7. In the preparation method of the present invention, the hole grouting is carried out in two steps. First, grouting is carried out in the drainage ditch so that the drainage ditch is filled with slurry, and then grouting is carried out on the slope. The mortar is filled in the drainage ditch and the slope soil, which improves the grouting efficiency, makes the slope soil dense, and does not generate a lot of waste when grouting the slope.

[0038] 8. In the present invention, concrete is sprayed onto the slope surface by grouting, and a hot forming device and a pressure device are used to accelerate the curing of the concrete, so that the sprayed concrete is firmly connected to the slope surface, making the slope soil more stable. At the same time, the concrete layer of the concrete in the later construction is relatively thin. When cracks exist during the concrete curing process, grouting is performed on the cracks, so that the cracks solidify again under the action of the grouting liquid, so that the concrete layer becomes a whole, and the safety of the slope is further improved.

[0039] 9. In the present invention, the spraying pipe and the grouting pipe are in a simultaneous working state during grouting, and the slope surface is sprayed through the spraying pipe, so that the mortar is sprayed more evenly, the shaping effect of the slope surface is improved, and the slope surface is made more compact.

[0040] 10. In the present invention, the diameter of the spraying pipe is relatively small, so that the mortar is sprayed more evenly during the spraying process, the spraying pressure of the spraying hole is reduced, and the spraying pipe is far away from the foot of the slope, which prevents the pressure of the spraying at the spraying port from being too high, resulting in excessive strength of the concrete layer at the foot of the slope, while the strength of the concrete layer on the slope does not meet the requirements, resulting in loose connection of the slope; the structure of the spraying pipe enables the concrete layer on the surface of the slope to form a whole, making the concrete more compact and stable.

[0041] 11. In the present invention, re-spraying concrete is carried out before the concrete solidifies, so that the re-sprayed concrete is bonded to the formed concrete, and there is no void on the surface of the slope, which further improves the safety of the slope, improves the bearing capacity of the slope, and reduces the probability of collapse after flood storage.

[0042] 12. In the process of the present invention, the slope reinforcement is firstly cleaned, and a drainage ditch is dug, a drainage pipe is arranged in the drainage ditch, and a water-diverting geotextile and a geotextile are laid. At the same time, the water inside the slope is guided through the drainage pipe, thereby avoiding the occurrence of gaps during the slope reinforcement, and at the same time, the soil inside the slope is made compact, thereby reducing the generation of voids on the surface of the concrete after forming. During the grouting process, grouting is performed through the grouting holes to fill the slope soil, and then the slope is sprayed with concrete, thereby improving the stability of the slope. Re-spraying is performed before the concrete is solidified, thereby forming a more stable protective layer on the surface of the protective layer formed by the concrete, thereby increasing the bearing capacity of the slope and reducing the probability of collapse after flood storage.

[0043] 13. This method forms an integral connection of the slope through the steps of pre-grouting, geotextile and concrete spraying, and makes the protective layer on the surface of the slope free of voids, further improving the connection strength and protection strength of the slope and increasing the service life of the slope. DETAILED DESCRIPTION

[0044] A process for reinforcing a water conservancy flood storage slope comprises the following steps:

[0045] Step 1, cleaning the slope: First, clean the surface of the slope to remove stones, weeds and obstacles that may hinder slope reinforcement;

[0046] Step 2, digging drainage ditches: a drainage ditch is set outward in a direction perpendicular to the slope at a distance of 1-1.5m from the outer edge of the slope, with a depth of 80-100mm, and a cover plate is set on the upper surface of the drainage ditch along the direction of the drainage ditch; further, a through groove is opened from the top of the slope to the foot of the slope at intervals along the direction of the drainage ditch, a drainage hole is opened at the bottom of the through groove and a hose is inserted as a drainage pipe, all drainage pipes are connected with the water collection tank, and a water collection well is opened at the position corresponding to the foot of the slope (bottom of the slope) and the water collection tank. When the water level in the drainage pipe is higher than the bottom of the through groove, the water flows into the water collection well;

[0047] Step 3, drainage pipe installation: Drain pipes are installed at equal intervals in the drainage ditch, with a depth of 60-80 mm, an inner diameter of 35 mm, and a spacing of 50-70 cm between the drain pipes; the drainage pipes and through grooves are sealed, cement is applied to the inside of the through grooves, the drainage pipes are buried, and the through grooves and slots are reinforced with concrete of the same material;

[0048] Step 4, laying the water diversion geotextile: after completing step 3, laying the water diversion geotextile, flattening the water diversion geotextile, and then compacting it to make it tight; laying a steel mesh on the surface of the geotextile, and embedding the steel mesh into the soil;

[0049] Step 5, laying geotextile: after step 4 is completed, laying geotextile on the surface of the water diversion geotextile, compacting the geotextile after laying, and the compaction degree is 50-80%, wherein after the geotextile in steps 4 and 5 is laid, a through hole is left above the drainage pipe, and the diameter of the through hole is less than 30mm;

[0050] Step 6, sealing the drainage pipe: After completing step 5, seal the holes above the drainage pipe on the geotextile;

[0051] Step 7, burying the grouting pipe and the shotcrete pipe: after completing step 6, holes are drilled on the surface of the water diversion geotextile in the direction perpendicular to the slope, with a hole depth of 80-120 cm. The shotcrete pipe and the grouting pipe are both arranged above the water diversion geotextile and connected with the grouting pipe and the shotcrete pipe at the same time. The grouting pipe and the shotcrete pipe are arranged in parallel, and the interval between the grouting pipes is 80-120 cm, and the interval between the shotcrete pipes is 80-120 cm. The grouting pipe and the shotcrete pipe are both PVC pipes with a diameter of 24 mm;

[0052] Step 8, grouting of the slope holes: connect the grouting pipe in step 7 to the pressure pump through the connecting pipe, grout the soil holes, and push the grouting pipe into the soil until the soil seeps out of the water. The grouting pipe is in an open state during grouting;

[0053] Step 9, grouting through a grouting pipe: under the action of pressure, the mortar is quickly sprayed from the grouting pipe onto the slope surface, the spraying pressure is not less than 2.5 MPa, the spraying height is 2-3 m, and the spraying thickness is 5-8 cm;

[0054] Step 10, re-spraying concrete: After step 9 is completed, re-spray concrete after the concrete is solidified, and re-spray concrete before the concrete is solidified, with a re-spraying thickness of 2-3cm. Curing treatment, spray the curing agent or concrete cover on the surface again to solidify the entire protective layer. Before the slope protective layer is solidified, pre-grouting is performed through the grouting holes, and then the gaps between the slope soil particles are filled densely, and then the geotextile is laid and then sprayed with concrete, which further improves the connection strength of the protective layer. Re-spraying concrete, after the protective layer is solidified, clean the slope, fill the raised soil, spray concrete on the slope surface, cover the geotextile, and install a protective plate on the upper part of the through groove.

[0055] When the slope reinforcement is completed, the gaps and cavities in the soil are cleared again, and then concrete is applied to the entire surface of the slope and smoothed. Concrete is poured in the through groove to form cement reinforcement piles, and the steel mesh is embedded. Cement slurry or concrete is applied to the surface to cover it until the geotextile and steel mesh are completely covered.

[0056] Among them, when cleaning the slope in step 1, if the soil is found to be soft, the slope is first solidified before the spraying support, and concrete is used for leveling and tamping to form a protective shell, and then the slope is sprayed.

[0057] In step 3, when setting the drainage hole, use a drill bit to drill vertically with a hole diameter of 8~20mm. After inserting the hose, seal the drill bit with cement, and together with the drainage pipe, form a drainage hole in the through groove to ensure the sealing of the drainage hole.

[0058] The drainage pipe is a PVC pipe, and a cement reinforcement protective layer is laid at the bottom of the groove. The cement reinforcement protective layer is flush with the slope surface. The cement reinforcement protective layer is arranged above the drainage pipe as a support for the drainage pipe and protects the drainage pipe from being damaged.

[0059] When setting up the drain pipe, set a groove at the bottom of the through groove for the installation of the drain pipe and hose. Reserve a height of more than 20 cm on the upper part of the drain pipe to facilitate the application of cement on the groove surface to form a protective layer.

[0060] When spraying the concrete reinforcement layer, if pits are formed, clean the pits first and then lay cement to fill the pits, insert short steel bars vertically into the pits, and then fix the mesh steel bars on the upper end of the steel bars for reinforcement. After the protective layer is cured, install galvanized steel plates on the mesh steel bars, fix the galvanized steel plates to the cement reinforcement protective layer on the surface of the through grooves, and reinforce them.

[0061] In step 5, after the geotextile and the protective layer are cured, the galvanized metal steel plate is installed on the sprayed concrete, the galvanized metal steel plate is fixed to the steel mesh with bolts, and then concrete is sprayed along the surface of the galvanized metal steel plate to cover the galvanized metal steel plate to form a protective layer. The galvanized metal steel plate is then fixed to the steel mesh of the protective layer with bolts to further improve the strength of the slope surface and extend its service life.

[0062] The spacing between the through grooves is 3m, the width of the through grooves is 30cm, and the depth is 40cm.

[0063] For the present invention, in the construction of water conservancy flood storage slope reinforcement, before the slope reinforcement, the slope is first cleaned, and the stones and other hard objects on the slope are cleared to avoid affecting the firmness of the slope. The slope surface is cleaned to ensure that the slope surface is relatively flat, and to ensure the smoothness and integrity of the slope protective layer. In the existing protective layer construction, the slopes with protrusions are generally not trimmed. If trimming is performed, on the one hand, the workload is large, and on the other hand, the uneven slope surface treatment will affect the firmness of the slope. Therefore, the process method for the construction of water conservancy flood storage slope reinforcement designed by us cleans the slope surface to ensure the flatness of the slope surface, trims the protruding parts to ensure the firmness of the slope, and avoids affecting the strength of the protective layer when the protective layer is sprayed in the later stage.

[0064] For the cleaned slopes, drainage holes are opened on the slope surface. When it rains heavily, the soil on the slope is eroded by rainwater, and the rainwater may gather at the bottom of the slope, resulting in increased soil loss. At this time, the water level at the bottom of the slope is lowered through the drainage holes to avoid the water level from rising and affecting the firmness of the slope.

[0065] In the process method of the hydraulic flood storage slope reinforcement construction of the present invention, a drainage pipe is used to gather the drainage hole, and the collected rainwater flows to the water collection trough through the drainage hole together with the drainage pipe. A water collection well is set at the bottom of the slope to collect rainwater, and at the same time, the soil at the bottom of the through groove is relatively loose. When the rainwater is discharged into the water collection trough through the drainage pipe, the soil at the bottom of the through groove is relatively loose and easy to collapse, which squeezes the drainage pipe, causing the drainage pipe to deform and affect the drainage of the drainage pipe. In order to avoid the collapse of the soil at the through groove, a cement reinforcement protective layer is set at the bottom of the through groove to protect the drainage pipe, and cement is applied to the bottom of the through groove and the surface of the drainage pipe to reinforce the drainage pipe and protect the drainage pipe at the same time.

[0066] The drainage pipe of the present invention is a PVC pipe, which is a circular pipe. A recess is set at the position of the top of the drainage pipe corresponding to the drainage hole to ensure that rainwater flows into the drainage pipe. At the same time, a groove is set at the bottom of the drainage pipe, and concrete is laid in the groove to protect the drainage pipe and reinforce the drainage pipe to ensure that the drainage pipe will not be deformed or damaged when it is squeezed, and to ensure that the water level on the bottom surface of the slope can enter the drainage pipe through the drainage hole and be discharged.

[0067] After cleaning the slope, a steel mesh is laid on the surface of the slope, and a steel mesh is embedded on the upper part of the drain pipe. Concrete is poured to wrap the drain pipe and the steel mesh as a whole. To prevent the steel mesh from loosening and falling off, a geotextile is set up and the steel mesh is embedded in the geotextile. When spraying concrete, the geotextile and concrete are wrapped as a whole to further improve the strength of the slope. The steel mesh is embedded in the concrete. In order to further improve the firmness of the slope, a galvanized metal steel plate is set. The galvanized steel plate has a certain rigidity and can reinforce the steel mesh while protecting the steel mesh from damage. During construction, a galvanized metal steel plate is set on the surface of the slope, which greatly improves the strength of the entire slope and further extends the service life of the slope.

[0068] The process method for reinforcing the construction of the water conservancy flood storage slope of the present invention is adopted. The drainage pipe is installed in the slope, and the drainage holes are gathered to prevent water from entering the bottom surface of the slope and affecting the firmness of the slope. At the same time, a galvanized metal steel plate is arranged on the upper part of the drainage pipe. The steel mesh of the galvanized metal steel plate is fixed to the steel wire mesh of the drainage hole to prevent the steel wire mesh from falling off. The entire steel mesh is protected by the galvanized metal steel plate to prevent the steel mesh from being damaged, and the firmness of the slope is further improved. Concrete is sprayed outside the steel mesh and the galvanized metal steel plate, so that the entire surface of the slope is relatively flat, and the galvanized metal steel plate is more beautiful, which improves the strength of the slope and facilitates the use of the slope protection layer.

[0069] In order to better grout into the protective layer, the pre-grouting slurry can be made of concrete with bonding strength. While spraying concrete on the slope, grouting is carried out into the slope through the grouting structure, so that the protective layer and the slope are connected as a whole to avoid the existence of voids.

[0070] The spray pipe and spray nozzle are installed on the slope surface. The spray pipe and the spray nozzle can be connected by metal pipes. The spray pipe and the spray nozzle can be made of PVC pipes. The spray nozzle is installed obliquely on the slope surface, and the angle between it and the horizontal plane is 15~25°.

[0071] In order to improve the sealing of the spraying nozzle, a spraying pipe is set in the spraying nozzle to ensure the sealing of the spraying pipe, avoid slurry overflow, and ensure uniform spraying. In order to improve the strength of the slurry, short steel bars are set in the slurry, and the short steel bars and the spraying pipe are welded together, so that the strength of the slurry is improved and the service life of the protective layer is extended.

[0072] In summary, the process method for the reinforcement construction of the water conservancy flood storage slope of the present invention reinforces the slope, opens a through groove on the slope, and uses a drainage pipe to collect the drainage holes to prevent the water flow from scouring the slope during heavy rain and reducing the strength of the slope. A steel mesh is laid on the surface of the slope, and reinforced with a galvanized steel plate, and covered with a geotextile to prevent the steel mesh from falling off, thereby extending the service life of the slope protection layer. In order to further improve the firmness of the connection of the protective layer, a galvanized steel plate is set at the through groove to protect the steel mesh and improve the strength of the slope. After the protective layer is formed, the cured concrete is sprayed to ensure the firmness of the connection of the protective layer. In order to improve the strength of the slope, a steel mesh is set in the concrete, and a galvanized steel plate is installed on the upper part of the through groove so that the entire protective layer structure is inlaid, thereby improving the overall strength of the slope protection layer.

Claims

1. A process for reinforcing the slope of a water conservancy flood storage, characterized in that: The following steps are involved: Step 1, cleaning the slope: First, clean the surface of the slope to remove stones, weeds and obstacles that may hinder slope reinforcement; Step 2, digging drainage ditches: set drainage ditches outwards in the direction perpendicular to the slope at a distance of 1-1.5m from the outer edge of the slope, with a depth of 80-100mm, and set covers on the upper surface of the drainage ditch along the direction of the drainage ditch; set a through groove from the top of the slope to the foot of the slope at intervals along the direction of the drainage ditch, set drainage holes at the bottom of the through groove and insert a hose as a drainage pipe, connect all drainage pipes with the water collection tank, set a water collection well at the position corresponding to the foot of the slope (bottom of the slope) and the water collection tank, and when the water level in the drainage pipe is higher than the bottom of the through groove, the water flows into the water collection well; Step 3, drain pipe installation: drain pipes are installed at equal intervals in the drainage ditch, the depth of the drain pipes is 60-80 mm, the inner diameter of the drain pipes is 35 mm, and the spacing between the drain pipes is 50-70 cm; Step 4, laying the water diversion geotextile: after completing step 3, laying the water diversion geotextile, flattening the water diversion geotextile, and then compacting it to make it tight; Step 5, laying geotextile: after step 4 is completed, geotextile is laid on the surface of the water diversion geotextile, and after the geotextile is laid, it is compacted, and the compactness is 50-80%, wherein after the geotextile in steps 4 and 5 is laid, a through hole is left above the drainage pipe, and the diameter of the through hole is less than 30mm; after the geotextile and the protective layer are cured, a galvanized metal steel plate is installed on the sprayed concrete, and the galvanized metal steel plate is fixed to the steel mesh with bolts, and then concrete is sprayed along the surface of the galvanized metal steel plate to cover the galvanized metal steel plate to form a protective layer, and then the galvanized metal steel plate is fixed to the steel mesh of the protective layer with bolts; Step 6, sealing the drainage pipe: After completing step 5, seal the holes above the drainage pipe on the geotextile; Step 7, burying the grouting pipe and the shotcrete pipe: after completing step 6, holes are drilled on the surface of the water diversion geotextile in the direction perpendicular to the slope, with a hole depth of 80-120 cm. The shotcrete pipe and the grouting pipe are both arranged above the water diversion geotextile and connected with the grouting pipe and the shotcrete pipe at the same time. The grouting pipe and the shotcrete pipe are arranged in parallel, and the interval between the grouting pipes is 80-120 cm, and the interval between the shotcrete pipes is 80-120 cm. The grouting pipe and the shotcrete pipe are both PVC pipes with a diameter of 24 mm; Step 8, grouting of the slope holes: connect the grouting pipe in step 7 to the pressure pump through the connecting pipe, grout the soil holes, and push the grouting pipe into the soil until the soil seeps out of the water. The grouting pipe is in an open state during grouting; Step 9, grouting through a grouting pipe: under the action of pressure, the mortar is quickly sprayed from the grouting pipe onto the slope surface, the spraying pressure is not less than 2.5 MPa, the spraying height is 2-3 m, and the spraying thickness is 5-8 cm; Step 10, re-spraying concrete: After step 9 is completed, re-spray concrete after the concrete is solidified, and re-spray concrete before the concrete is solidified. The re-spraying thickness is 2-3cm. Continue the solidification treatment, spray the curing agent or concrete cover on the surface again to solidify the entire protective layer. Before the slope protective layer is solidified, pre-grouting is performed through the grouting holes, and then the gaps between the slope soil particles are filled densely. Then, spray concrete after laying the geotextile, continue to spray concrete, and after the protective layer is solidified, clean the slope, fill the raised soil, spray concrete on the slope surface, cover the geotextile, and install a protective plate on the upper part of the through groove.

2. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: During the grouting process of step 8, the mortar is sprayed from bottom to top, the slope surface is scanned during the grouting process, and supplementary grouting is performed on defective parts through the grouting holes.

3. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: In step 9, during the concrete curing process, thermoforming equipment and pressure equipment are used for thermoforming. The temperature of the thermoforming equipment is 20-25° C., and the pressure equipment applies pressure to the slope surface, and the pressure is not less than 3Mpa.

4. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: In step 5, the geotextile is laid with a hole near the slope, the outer diameter of the hole is less than 15 mm, and the inner diameter of the hole is greater than the diameter of the drainage pipe and less than or equal to 60 mm.

5. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: In step 6, the material used for sealing is polyethylene foam sealing material. Before sealing, the area around the via hole is sealed with cement slurry. The width of the cement slurry is greater than 20 cm and the thickness is greater than or equal to 2 cm. After sealing, the cement slurry is used for leveling.

6. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: The slope surface in step 1 is inclined, and a shotcrete hole is set at the foot of the slope with a diameter of 65 mm.

7. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: In step 7, the shotcrete pipe is more than 3m away from the toe of the slope, a shotcrete port is provided on the shotcrete pipe, the diameter of the shotcrete port is smaller than the diameter of the shotcrete pipe, and the outer edge of the shotcrete port is trumpet-shaped and extends outward, and the diameter of the shotcrete pipe is less than 2cm.

8. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: In step 7, before grouting, the grouting pipe is connected to the pressure pump, and the pressure pump is used to perform trial grouting on the grouting pipe until cement slurry appears in the drainage ditch, completing the trial grouting.

9. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: In step 1, the slope is cleaned manually by first cleaning the soil surface and then flattening the uneven slope surface with a shovel.

10. A process for reinforcing a water conservancy flood storage slope as claimed in claim 1, characterized in that: In step 2, the drainage ditch is dug manually. During the digging process, a shallow ditch with a depth of 20-30 mm is first dug perpendicular to the slope direction, and then the shallow ditch is filled and compacted with soil.