CN114000530A - Seepage-proofing reinforcing construction process for dam foundation of hydraulic engineering dam - Google Patents
Seepage-proofing reinforcing construction process for dam foundation of hydraulic engineering dam Download PDFInfo
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- CN114000530A CN114000530A CN202111323523.6A CN202111323523A CN114000530A CN 114000530 A CN114000530 A CN 114000530A CN 202111323523 A CN202111323523 A CN 202111323523A CN 114000530 A CN114000530 A CN 114000530A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/40—Foundations for dams across valleys or for dam constructions
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The application relates to the field of hydraulic engineering dam construction, and particularly discloses an anti-seepage reinforcement construction process for a dam foundation of a hydraulic engineering dam, which comprises the following steps: s1, excavating a foundation trench on the ground below the gate of the dam; s2, tamping the bottom of the foundation trench through mechanical equipment; s3, driving a fixed pile into the bottom of the tamped foundation trench, and arranging a plurality of tensile fixing plates on the circumferential surface of the fixed pile; s4, building a building template above the foundation trench according to the actual construction shape of the dam foundation at the gate, wherein the fixing piles and the tensile fixing plates are positioned in a construction cavity defined by the building template; s5, injecting concrete and cement paste into the construction cavity to form a gate dam foundation; s6, fixedly installing an anti-seepage sealing plate at the joint of the gate dam foundation and the water area ground, and filling waterproof sealant and cement paste into the back of the anti-seepage sealing plate. Through the process, the problem that the bottom of the gate dam foundation is damaged due to flood erosion is solved.
Description
Technical Field
The application relates to the field of hydraulic engineering dam construction, in particular to an anti-seepage reinforcing construction process for a dam foundation of a hydraulic engineering dam.
Background
The hydraulic engineering dam refers to a dam for intercepting rivers and blocking water, a water blocking dam of reservoirs, rivers and the like, a dam foundation is arranged at the bottom of the hydraulic engineering dam or the position of a flood discharge gate, and the dam foundation plays a role in strengthening and supporting the bottom of the dam.
Taking the dam foundation at the flood discharge gate as an example, the water flow stamping force borne by the dam foundation is large, the dam foundation is positioned at the bottom of the water area of the flood discharge area, and the water pressure borne by the dam foundation is also large, so that the strength of the gate dam foundation and the sealing performance of the junction of the gate dam foundation and the water area ground are of great importance.
In the pouring construction process of the dam foundation, the main mode of the existing dam foundation is as follows: firstly, a foundation trench is dug and tamped on the ground at a gate, then a dam foundation body is formed at the position of the foundation trench through concrete pouring, the strength of the dam foundation body is not high enough, and in the long-term flood scouring process of a flood discharge area, the bottom of the dam foundation is easy to be damaged due to scouring, flood can erode the interior of the dam foundation, and potential safety hazards are caused.
Disclosure of Invention
In order to improve the problem that the bottom scouring is damaged due to low strength of the gate dam foundation, the application provides an anti-seepage reinforcing construction process for the dam foundation of the hydraulic engineering dam.
The application provides an anti-seepage reinforcement construction process for a dam foundation of a hydraulic engineering dam, which adopts the following technical scheme:
the seepage-proofing reinforcing construction process for the dam foundation of the hydraulic engineering dam comprises the following steps:
s1, excavating a foundation trench on the ground below a gate of the dam, wherein the foundation trench from the upstream to the downstream is a first construction foundation trench, a gentle support foundation trench and a second construction foundation trench;
s2, tamping the bottoms of the first construction foundation trench, the gentle support foundation trench and the second construction foundation trench through mechanical equipment;
s3, driving fixing piles at the bottoms of the first construction foundation groove, the gentle support foundation groove and the second construction foundation groove after tamping, and arranging a plurality of tensile fixing plates on the peripheral surface of each fixing pile;
s4, building a building template above the foundation trench according to the actual construction shape of the dam foundation at the gate, wherein the building template encloses the construction shape of the dam foundation, and the fixing pile and the tensile fixing plate are positioned in a construction cavity enclosed by the building template;
s5, injecting concrete and cement paste into the construction cavity, filling the construction cavity with the concrete and the cement paste, and removing the building template after solidification to form a gate dam foundation;
and S6, installing an impermeable sealing plate at the joint of the sluice gate dam foundation and the water area ground, wherein two ends of the impermeable sealing plate are fixedly connected with the sluice gate dam foundation and the water area ground through anchoring rods respectively, and the back of the impermeable sealing plate is filled with waterproof sealant and cement paste.
By adopting the technical scheme, firstly, a foundation is provided for pouring of the sluice gate dam foundation through the first construction foundation trench, the gentle support foundation trench and the second construction foundation trench which are compacted, a building template is built above the foundation trench, the building template encloses the construction shape of the dam foundation, concrete and cement paste are injected into the construction cavity of the building template and are solidified to form the sluice gate dam foundation, the shape of the sluice gate dam foundation can be correspondingly changed through different building structure modes of the building template in the pouring forming process of the sluice gate dam foundation, the sluice gate dam foundation is suitable for the structural requirements of the sluice gate dam foundation, and the strength of the sluice gate dam foundation can be improved through the processing mode of pouring inside the sealed construction cavity;
secondly, in order to further improve the strength of the gate dam foundation, fixing piles are driven into the bottoms of the first construction foundation groove, the gentle supporting foundation groove and the second construction foundation groove after tamping, a plurality of tensile fixing plates are arranged on the peripheral surface of each fixing pile, the fixing piles and the tensile fixing plates are located in a construction cavity defined by building templates, when concrete and cement slurry are filled into the construction cavity, the fixing piles and the tensile fixing plates are directly embedded into the concrete, after the gate dam foundation is solidified and formed, the fixing piles play a role in supporting and fixing the bottom of the gate dam foundation, the gate dam foundation is firmly locked and fixed, in addition, the tensile fixing plates play a tensile effect in the gate dam foundation, and the gate dam foundation is prevented from being deformed and cracked.
Optionally, the bottoms of the first construction foundation trench and the second construction foundation trench are planes, and the bottom surface of the gentle support foundation trench is an inclined surface.
Through adopting above-mentioned technical scheme, first construction foundation trench and second construction foundation trench make things convenient for the fashioned concrete placement of sluice gate dam foundation, and the inclined plane design of gently supporting the foundation trench bottom mainly is the concrete of being convenient for in the construction cavity and flows towards first construction foundation trench, second construction foundation trench, prevents at the in-process of pouring, and the concrete in the construction cavity appears local piling up and leads to the pouring inhomogeneous.
Optionally, the building templates include slope template, horizontal template and the arc template of mutual fixed linking, all be equipped with grout hole and vibrting spear inserted hole on slope template, horizontal template and the arc template, grout hole and vibrting spear inserted hole with the construction cavity intercommunication.
By adopting the technical scheme, the building template is formed by splicing an inclined template, a horizontal template and an arc-shaped template, the building of the building template is determined according to the shape of the sluice gate dam foundation, and the building templates corresponding to sluice gate dam foundations with different shapes are built in different shapes;
the grouting holes in the templates are mainly used for filling concrete and cement paste into the construction cavity, the vibrating rod insertion holes are mainly used for inserting concrete vibrating rods into the construction cavity, and the concrete vibrating rods are always in a vibrating state in the pouring process, so that the concrete and the cement paste are uniformly filled in the construction cavity.
Optionally, in S5, the operation step of injecting concrete and cement paste into the construction cavity includes:
s51, inserting concrete supply pipes into grouting holes of the inclined formworks, the horizontal formworks and the arc formworks, and inserting concrete vibrating rods into vibrating rod insertion openings of the formworks;
s52, injecting concrete into the construction cavity through the concrete supply pipes on the templates, and starting the concrete vibrating rods in the process of injecting the concrete so that the concrete is uniformly filled in the construction cavity;
s53, after the filling amount of concrete injected into the construction cavity reaches one third, inserting a cement slurry supply pipe into each grouting hole while keeping the concrete vibrating rod normally started, injecting cement slurry into the construction cavity by the cement slurry supply pipe, and uniformly filling the cement slurry into gaps of the concrete;
s54, after cement paste supply is completed, injecting concrete into the construction cavity again through the concrete supply pipe, after the filling amount of the concrete injected into the construction cavity reaches two thirds, inserting the cement paste supply pipe into each grouting hole while keeping the concrete vibrating rod normally started, injecting cement paste into the construction cavity through the cement paste supply pipe, and uniformly filling the cement paste into gaps of the concrete;
after the supply of the cement paste is completed at S55 and S54, the concrete is injected into the construction cavity again through the concrete supply pipe until the construction cavity is filled with the concrete.
Through adopting above-mentioned technical scheme, the gate dam foundation in the construction cavity is at the in-process of casting moulding, and the concrete vibrating spear remains the state of vibration throughout, and concrete and grout in the construction cavity are filled in turn for concrete and grout can fully fuse, and grout has not only played the effect of solidifying the concrete, has also improved the mobility of concrete simultaneously, guarantees to fill the concrete in the construction cavity and can fully flow each corner, has improved the quality of pouring.
Optionally, in S5, when the concrete and the cement paste are injected into the construction cavity, the volume of the concrete injected in a single time is 5 to 10 times of the volume of the cement paste injected in a single time.
By adopting the technical scheme, in the filling process, concrete is used as a main fixed building raw material, cement paste is used as a flowable binder raw material, and the actual experiment process finds that the strength of a casting body formed by solidification is highest when the volume of the filled concrete is 5-10 times of that of the cement paste.
Optionally, in S5, the gate dam foundation is formed by casting, and the inclined flow guide surface and the arc flow guide surface are formed on the surface of the gate dam foundation, and the inclined flow guide surface and the bottom of the dam form a flood discharge channel, the arc flow guide surface and the bottom of the dam form a flood discharge lift channel, the flood discharge channel is communicated with the gate, and the flood discharge lift channel is communicated with the flood discharge channel.
By adopting the technical scheme, the shape of the gate dam foundation is adaptive to that of the gate, and the formed flood discharge channel and the flood discharge lift channel are convenient to guide flood at the gate.
Optionally, the section of the anti-seepage sealing plate is arc-shaped, and a grouting hole is formed in the anti-seepage sealing plate.
By adopting the technical scheme, the anti-seepage sealing plate is arranged at the joint of the sluice gate dam foundation and the water area ground, the joint gap between the sluice gate dam foundation and the water area ground plays a role in sealing protection, flood is prevented from directly scouring the bottom position of the sluice gate dam foundation, in addition, the cross section of the anti-seepage sealing plate is arc-shaped, the anti-seepage sealing plate is conveniently and fixedly arranged on the sluice gate dam foundation and the water area ground, the contact surface between the arc-shaped anti-seepage sealing plate and high-pressure water flow is small, the front stamping is avoided, and the stamping force born by the anti-seepage sealing plate is reduced.
Optionally, in S6, when the back surface of the impermeable sealing plate is filled with the waterproof sealant and the cement paste, the two ends of the impermeable sealing plate are plugged, the waterproof sealant is injected into the joint gap between the gate dam foundation and the water area ground through the grouting hole on the impermeable sealing plate, and then the cement paste is injected into the cavity on the back surface of the impermeable sealing plate through the grouting hole until the cavity is filled.
By adopting the technical scheme, the waterproof sealant which is filled firstly mainly plays a role in sealing the joint gaps of the gate dam foundation and the water area ground, the cement paste which is filled secondly mainly plays a role in filling the cavity on the back of the anti-seepage sealing plate, the solidified cement paste plays a role in pouring and fixing the anti-seepage sealing plate, and the installation firmness of the anti-seepage sealing plate is ensured.
Optionally, an inclined support opening is formed in one side of the bottom of the second construction foundation trench, and the opening angle of the inclined support opening is 30-90 degrees.
By adopting the technical scheme, the inclined support port mainly plays a role in auxiliary support and fixation on the formed gate dam foundation.
Optionally, before the gate dam foundation obtained by pouring the concrete is put into use, the surface of the gate dam foundation is subjected to waterproof and corrosion-resistant treatment.
By adopting the technical scheme, after the surface of the gate dam foundation is subjected to waterproof and corrosion-resistant treatment, the damage degree of the gate dam foundation in the using process is reduced, and the service life is prolonged.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the fixing piles are driven into the bottoms of the first construction foundation trench, the gentle supporting foundation trench and the second construction foundation trench, a plurality of tensile fixing plates are arranged on the peripheral surface of each fixing pile, the fixing piles and the tensile fixing plates are located in a construction cavity defined by building templates, the fixing piles and the tensile fixing plates are directly embedded into concrete when the concrete and cement paste are filled into the construction cavity, after the gate dam foundation is solidified and formed, the fixing piles play a role in supporting and fixing the bottom of the gate dam foundation, the gate dam foundation is firmly locked and fixed, the tensile fixing plates play a tensile effect in the gate dam foundation, the gate dam foundation is prevented from being deformed and cracked, and the strength of the gate dam foundation is improved;
2. the joint of the gate dam foundation and the water area ground is provided with an anti-seepage sealing plate, two ends of the anti-seepage sealing plate are respectively fixedly connected with the gate dam foundation and the water area ground through anchoring rods, waterproof sealant and cement paste are filled on the back surface of the anti-seepage sealing plate, the waterproof sealant filled firstly mainly plays a role in sealing the joint gap between the gate dam foundation and the water area ground, the cement paste filled secondly mainly plays a role in filling a cavity on the back surface of the anti-seepage sealing plate, the solidified cement paste plays a role in pouring and fixing the anti-seepage sealing plate to ensure the mounting firmness of the anti-seepage sealing plate, meanwhile, the solidified cement paste plays a role in sealing and protecting the waterproof sealant, the joint gap between the gate dam foundation and the water area ground is better sealed, and the flood hardly contacts the joint position of the gate dam foundation and the water area ground in the high-strength scouring process, the problem that the bottom of the gate dam foundation is damaged due to flood scouring is avoided.
Drawings
FIG. 1 is a flow chart of the construction process of the present application;
FIG. 2 is a schematic diagram of a dam foundation construction structure corresponding to the construction steps S1 and S2;
FIG. 3 is a schematic diagram of a dam foundation construction structure corresponding to the construction step S3;
FIG. 4 is a schematic diagram of a dam foundation construction structure corresponding to the construction step S4;
FIG. 5 is a schematic view of a portion of the structure of FIG. 4;
FIG. 6 is a schematic diagram of a dam foundation construction structure corresponding to the construction step S5;
FIG. 7 is a schematic diagram of a dam foundation construction structure corresponding to the construction step S6;
FIG. 8 is a schematic diagram of a dam foundation structure obtained after the construction of the present application.
Description of reference numerals: 1. a dam; 2. a first construction foundation trench; 3. a base groove is supported gently; 4. a second construction foundation trench; 41. an inclined support port; 5. fixing the pile; 6. a tensile fixing plate; 7. constructing a cavity; 8. inclining the template; 9. a horizontal template; 10. an arc-shaped template; 11. grouting holes; 12. a vibrating rod insertion opening; 13. a gate dam foundation; 131. inclining the flow guide surface; 132. an arc-shaped flow guide surface; 14. the water area ground; 15. an impermeable sealing plate; 16. an anchoring rod; 17. a back cavity; 18. grouting holes; 19. a flood discharge passage; 20. a flood discharge lift channel; 21. rotating the paddle; 22. a wind power generator.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The embodiment of the application discloses an anti-seepage reinforcement construction process for a dam foundation of a hydraulic engineering dam, which mainly comprises the following steps with reference to fig. 1:
s1, excavating a foundation trench on the ground below the gate of the dam 1, wherein the foundation trench from the upstream to the downstream is a first construction foundation trench 2, a gentle support foundation trench 3 and a second construction foundation trench 4 in sequence, and the constructed structure refers to FIG. 2;
in the step, excavating the foundation trench by adopting an excavator, determining the size of each foundation trench according to a construction drawing, and optimally supporting the bottom of each foundation trench by using a rock structure;
wherein, one side of the bottom of the second construction foundation trench 4 is designed to be an inclined support opening 41, the opening angle of the inclined support opening 41 is 30-90 degrees, and the inclined support opening 41 is used for assisting in supporting and fixing the formed gate dam foundation 13.
S2, tamping the bottoms of the first construction foundation trench 2, the gentle supporting foundation trench 3 and the second construction foundation trench 4 through a mechanical tamper, and fastening the side wall of the tamped foundation trench and the soil layer at the bottom to avoid collapse in the construction process;
the bottom of the first construction foundation trench 2 after the ramming and the second construction foundation trench 4 is the plane, the bottom surface that supports foundation trench 3 gently is the inclined plane, first construction foundation trench 2 and second construction foundation trench 4 mainly make things convenient for the fashioned concrete placement of gate dam foundation, the inclined plane design that supports foundation trench 3 bottoms gently mainly is the concrete of being convenient for in the work progress towards first construction foundation trench 2, second construction foundation trench 4 flows, prevent the in-process at the pouring, the concrete appears local piling up and leads to the pouring inhomogeneous.
S3, referring to fig. 3, a spud pile 5 is driven into the bottom of the first construction foundation trench 2, the gentle support foundation trench 3 and the second construction foundation trench 4 after tamping, and a plurality of tensile fixing plates 6 are arranged on the circumferential surface of the spud pile 5, the tensile fixing plates 6 are fixedly connected with the spud pile 5 mainly by welding, the depth of pressing the spud pile 5 into the foundation trench is determined according to the height of the gate dam foundation to be processed, and the depth of burying the spud pile 5 into the ground bottom is less than or equal to half of the height of the gate dam foundation.
S4, referring to FIG. 4 and FIG. 5, building a building template above the foundation trench according to the actual construction shape of the dam foundation at the gate, wherein the building template encloses the construction shape of the dam foundation, and the fixed pile 5 and the tensile fixing plate 6 are located in a construction cavity 7 enclosed by the building template;
wherein, the building templates includes the slope template 8 that mutual fixed links up, horizontal template 9 and arc template 10, the buildding of building templates itself is decided according to sluice gate dam foundation shape itself, the shape that the building templates that the sluice gate dam foundation of different shapes corresponds was built is also different, slope template 8, all be equipped with grout hole 11 and vibrting spear inserted hole 12 on horizontal template 9 and the arc template 10, grout hole 11 and vibrting spear inserted hole 12 and construction cavity 7 intercommunication, grout hole 11 is used for connecting concrete supply pipe or grout supply pipe, vibrting spear inserted hole 12 is used for inserting the concrete vibrting spear in towards construction cavity 7.
All be equipped with corresponding grout hole 11 and vibrting spear inserted hole 12 on each template, the setting of a plurality of grout holes 11 is mainly in guaranteeing the work progress, and concrete and grout can be poured into to every position homoenergetic in the construction cavity 7, and the setting of a plurality of vibrting spear inserted holes 12 is mainly that each region in the construction cavity 7 of being convenient for can both settle the concrete vibrting spear.
S5, referring to FIG. 6, injecting concrete and cement paste into the construction cavity 7, filling the construction cavity with the concrete and the cement paste, and removing the building template after solidification to form a gate dam foundation 13;
concrete and cement paste are injected into the construction cavity 7 of the building template and solidified to form the gate dam foundation 13, the shape of the gate dam foundation 13 can be correspondingly changed through different building structure modes of the building template in the casting molding process, the gate dam foundation is suitable for the structural requirements of the gate dam foundations at different flood discharge gates, and the strength of the gate dam foundation 13 can be improved through the processing mode of casting inside the sealed construction cavity 7.
Inside when filling concrete and grout of construction cavity 7, spud pile 5 and tensile fixed plate 6 are by direct pre-buried to the concrete, gate dam foundation 13 solidifies the shaping back, and spud pile 5 has played the fixed effect of support to the bottom of gate dam foundation 13, and gate dam foundation 13 is fixed by firm locking, and in addition, tensile effect has been played in gate dam foundation 13 to tensile fixed plate 6, prevents gate dam foundation deformation, fracture.
In S5, concrete and cement slurry are injected into the construction cavity 7 by the following steps:
s51, inserting concrete supply pipes into grouting holes 11 of the inclined formworks 8, the horizontal formworks 9 and the arc formworks 10, inserting concrete vibrating rods into vibrating rod insertion holes 12 of the formworks, and extending the concrete vibrating rods into the construction cavity 7;
s52, injecting concrete into the construction cavity 7 through the concrete supply pipes on the templates, and starting the concrete vibrating rods in the process of injecting the concrete so that the concrete is uniformly filled in the construction cavity 7;
s53, after the filling amount of concrete injected into the construction cavity 7 reaches one third, inserting cement slurry supply pipes into the grouting holes 11 while keeping the concrete vibrating spear normally started, injecting cement slurry into the construction cavity 7 by the cement slurry supply pipes, and uniformly filling the cement slurry into gaps of the concrete;
s54, after cement paste supply is completed, injecting concrete into the construction cavity 7 again through the concrete supply pipe, after the filling amount of the concrete injected into the construction cavity 7 reaches two thirds, keeping the normal start of the concrete vibrating rod, inserting the cement paste supply pipe into each grouting hole 11, injecting cement paste into the construction cavity 7 through the cement paste supply pipe, and uniformly filling the cement paste into gaps of the concrete;
after the supply of the cement paste is completed in step S55 and step S54, the concrete is again injected into the construction cavity 7 through the concrete supply pipe until the concrete in the construction cavity 7 is filled.
Through the construction method, the gate dam foundation 13 in the construction cavity 7 is always kept in a vibrating state in the casting molding process, and concrete and cement paste in the construction cavity 7 are alternately filled, so that the concrete and the cement paste can be fully fused, the cement paste not only plays a role in solidifying the concrete, but also improves the fluidity of the concrete, ensures that the concrete filled in the construction cavity 7 can fully flow to all corners, and improves the casting quality.
Further, in order to improve the pouring quality, when concrete and cement paste are injected into the construction cavity 7, the volume of the concrete injected once is 5-10 times of the volume of the cement paste injected once. In the filling process, concrete is used as a main fixed building raw material, cement paste is used as a flowable binder raw material, and in the actual experiment process, the strength of a casting body formed by solidification is the highest when the volume of the filled concrete is 5-10 times of that of the cement paste.
In addition, the surface of the gate dam foundation 13 formed by casting is provided with an inclined flow guide surface 131 and an arc flow guide surface 132, the inclined flow guide surface 131 and the bottom of the dam 1 form a flood discharge channel 19, the arc flow guide surface 132 and the bottom of the dam form a flood discharge head channel 20, the flood discharge channel 19 is communicated with the gate, the flood discharge head channel 20 is communicated with the flood discharge channel 19, the shape of the gate dam foundation 13 is matched with that of the gate, and the flood discharge channel 19 and the flood discharge head channel 20 after forming are convenient for guiding flood at the gate.
S6, referring to fig. 7 and 8, after the gate dam foundation 13 is formed, an impermeable sealing plate 15 is installed at the joint of the gate dam foundation 13 and the water area ground 14, two ends of the impermeable sealing plate 15 are respectively fixedly connected with the gate dam foundation 13 and the water area ground 14 through anchoring rods 16, wherein the section of the impermeable sealing plate 15 is arc-shaped, a grouting hole 18 is formed in the impermeable sealing plate 15, and in order to improve the sealing performance, a cavity 17 on the back of the impermeable sealing plate 15 is filled with waterproof sealant and cement paste.
When the back of the impermeable sealing plate 15 is filled with waterproof sealant and cement paste, the two ends of the impermeable sealing plate 15 are plugged, firstly, the waterproof sealant is injected into the joint gap between the gate dam foundation 13 and the water area ground 14 through the grouting holes 18 on the impermeable sealing plate 15, and then the cement paste is injected into the cavity 17 on the back of the impermeable sealing plate through the grouting holes 18 until the cavity is filled.
The anti-seepage sealing plate 15 is arranged at the joint of the gate dam foundation 13 and the water area ground 14, plays a role in sealing and protecting the joint gap between the gate dam foundation 13 and the water area ground 14, prevents flood from directly scouring the bottom position of the gate dam foundation 13, and is convenient to fixedly install on the gate dam foundation 13 and the water area ground 14 because the cross section of the anti-seepage sealing plate 15 is arc-shaped, the contact surface between the arc-shaped anti-seepage sealing plate 15 and high-pressure water flow is small, so that front stamping is avoided, and the stamping force born by the anti-seepage sealing plate 15 is reduced.
In the sealing operation process, the waterproof sealant mainly plays a role in sealing the joint gaps of the gate dam foundation 13 and the water area ground 14, the cement paste filled is mainly used for filling the back cavity 17 of the anti-seepage sealing plate 15, the solidified cement paste plays a role in pouring and fixing the anti-seepage sealing plate 15, and the installation firmness of the anti-seepage sealing plate 15 is ensured, meanwhile, after the back cavity 17 of the anti-seepage sealing plate 15 is filled with the cement paste, the solidified cement paste plays a role in sealing and protecting the waterproof sealant, the joint gaps of the gate dam foundation 13 and the water area ground 14 are better sealed, and in the process of high-strength scouring, the flood hardly contacts the joint positions of the gate dam foundation 13 and the water area ground 14, so that the problem that the bottom of the gate dam foundation 13 is damaged due to scouring of the flood is avoided.
Further, before the gate dam foundation 13 obtained by pouring concrete is put into use, the surface of the gate dam foundation is subjected to waterproof and corrosion-resistant treatment, and after the surface of the gate dam foundation is subjected to waterproof and corrosion-resistant treatment, the damage degree of the gate dam foundation in the use process is reduced, and the service life is prolonged.
In addition, in order to facilitate hydroelectric power generation, a rotating blade 21 is arranged at the joint of the flood discharge channel 19 and the flood discharge lift channel 20, the rotating blade 21 is connected with a wind driven generator 22, when a gate is opened for discharging flood, flood flow flowing in the flood discharge channel 19 impacts the rotating blade 21, the rotating blade 21 drives the wind driven generator 22 to operate, and the wind driven generator 22 is connected with a power grid system, so that the effect of generating power is achieved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The seepage-proofing reinforcing construction process of the dam foundation of the hydraulic engineering dam is characterized by comprising the following steps of:
s1, excavating a foundation trench on the ground below a gate of the dam (1), wherein the foundation trench from upstream to downstream is a first construction foundation trench (2), a gentle support foundation trench (3) and a second construction foundation trench (4) in sequence;
s2, tamping the bottoms of the first construction foundation trench (2), the gentle support foundation trench (3) and the second construction foundation trench (4) through mechanical equipment;
s3, driving a fixed pile (5) at the bottom of the first construction foundation trench (2), the gentle support foundation trench (3) and the second construction foundation trench (4) after tamping, and arranging a plurality of tensile fixing plates (6) on the peripheral surface of the fixed pile (5);
s4, building a building template above the foundation trench according to the actual construction shape of the dam foundation at the gate, wherein the building template encloses the construction shape of the dam foundation, and the fixed pile (5) and the tensile fixing plate (6) are positioned in a construction cavity (7) enclosed by the building template;
s5, injecting concrete and cement paste into the construction cavity (7), filling the construction cavity (7) with the concrete and the cement paste, and removing the building template after solidification to form a gate dam foundation (13);
s6, installing an anti-seepage sealing plate (15) at the joint of the gate dam foundation (13) and the water area ground (14), wherein two ends of the anti-seepage sealing plate (15) are respectively fixedly connected with the gate dam foundation (13) and the water area ground (14) through anchoring rods (16), and waterproof sealant and cement paste are filled in the back of the anti-seepage sealing plate (15).
2. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 1, which is characterized in that: the bottom of the first construction foundation trench (2) and the bottom of the second construction foundation trench (4) are planes, and the bottom surface of the gentle support foundation trench (3) is an inclined surface.
3. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 1, which is characterized in that: the building template includes slope template (8), horizontal template (9) and arc template (10) that mutual fixed links up, all be equipped with grout hole (11) and vibrting spear inserted hole (12) on slope template (8), horizontal template (9) and arc template (10), grout hole (11) and vibrting spear inserted hole (12) with construction cavity (7) intercommunication.
4. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 3, which is characterized in that: in S5, the operation of injecting concrete and cement paste into the construction cavity includes:
s51, inserting concrete supply pipes into grouting holes (11) of the inclined formworks (8), the horizontal formworks (9) and the arc formworks (10), and inserting concrete vibrating rods into vibrating rod insertion holes (12) of the formworks;
s52, injecting concrete into the construction cavity (7) through the concrete supply pipes on the templates, and starting the concrete vibrating rod in the process of injecting the concrete so that the concrete is uniformly filled in the construction cavity (7);
s53, after the filling amount of concrete injected into the construction cavity (7) reaches one third, inserting cement slurry supply pipes into the grouting holes (11) while keeping the concrete vibrating spear normally started, injecting cement slurry into the construction cavity (7) by the cement slurry supply pipes, and uniformly filling the cement slurry into gaps of the concrete;
s54, after cement paste supply is completed, injecting concrete into the construction cavity (7) again through a concrete supply pipe, after the filling amount of the concrete injected into the construction cavity (7) reaches two thirds, inserting the cement paste supply pipe into each grouting hole (11) while keeping the normal start of the concrete vibrating rod, injecting cement paste into the construction cavity (7) through the cement paste supply pipe, and uniformly filling the cement paste into gaps of the concrete;
and S55, after the cement paste supply in the S54 is finished, injecting concrete into the construction cavity (7) again through the concrete supply pipe until the concrete in the construction cavity is filled.
5. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 4, which is characterized in that: in the step S5, when concrete and cement paste are injected into the construction cavity (7), the volume of the concrete injected in a single time is 5-10 times of the volume of the cement paste injected in a single time.
6. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 4, which is characterized in that: in the S5, the surface of the gate dam foundation (13) is provided with an inclined flow guide surface (131) and an arc flow guide surface (132), the inclined flow guide surface (131) and the bottom of the dam (1) form a flood discharge channel (19), the arc flow guide surface (132) and the bottom of the dam (1) form a flood discharge head channel (20), the flood discharge channel (19) is communicated with the gate, and the flood discharge head channel (20) is communicated with the flood discharge channel (19).
7. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 1, which is characterized in that: the section of the anti-seepage sealing plate (15) is arc-shaped, and a grouting hole (18) is formed in the anti-seepage sealing plate (15).
8. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 7, which is characterized in that: in the step S6, when the back face of the impervious sealing plate (15) is filled with waterproof sealant and cement paste, the waterproof sealant is injected into the joint gap between the gate dam foundation (13) and the water area ground (14) through the grouting hole (18) in the impervious sealing plate (15), and then the cement paste is injected into the cavity on the back face of the impervious sealing plate through the grouting hole (18) until the cavity is filled.
9. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 1, which is characterized in that: an inclined supporting opening (41) is formed in one side of the bottom of the second construction foundation trench (4), and the opening angle of the inclined supporting opening (41) is 30-90 degrees.
10. The seepage-proofing and reinforcing construction process for the dam foundation of the hydraulic engineering dam according to claim 1, which is characterized in that: before the gate dam foundation (13) obtained by pouring concrete is put into use, the surface of the gate dam foundation is subjected to waterproof and corrosion-resistant treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111323523.6A CN114000530A (en) | 2021-11-10 | 2021-11-10 | Seepage-proofing reinforcing construction process for dam foundation of hydraulic engineering dam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111323523.6A CN114000530A (en) | 2021-11-10 | 2021-11-10 | Seepage-proofing reinforcing construction process for dam foundation of hydraulic engineering dam |
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| CN114000530A true CN114000530A (en) | 2022-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094940A (en) * | 2022-06-20 | 2022-09-23 | 河南大学 | Seepage intercepting structure suitable for shallow sea deep foundation pit and construction method thereof |
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2021
- 2021-11-10 CN CN202111323523.6A patent/CN114000530A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094940A (en) * | 2022-06-20 | 2022-09-23 | 河南大学 | Seepage intercepting structure suitable for shallow sea deep foundation pit and construction method thereof |
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