CN112681237A - Rockfill dam filling construction method - Google Patents
Rockfill dam filling construction method Download PDFInfo
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- CN112681237A CN112681237A CN202011534248.8A CN202011534248A CN112681237A CN 112681237 A CN112681237 A CN 112681237A CN 202011534248 A CN202011534248 A CN 202011534248A CN 112681237 A CN112681237 A CN 112681237A
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Abstract
The invention discloses a rockfill dam body filling construction method, which comprises the following steps: the method comprises the following steps of (1) rolling test, dam material paving, dam material supplement water spraying, dam material rolling and quality inspection, wherein the method is used as an electrode material for sodium storage of a sodium ion battery; according to the invention, through carrying out the rolling test before filling the dam body, the reasonability of the design compaction standard of the filling of the dam body is verified, various parameters such as physical, mechanical and permeability characteristic indexes of each filling material after rolling are provided for the design, the dam face is convenient for subsequent rolling operation by carrying out the pushing and spreading operation after unloading, the influence of the water loss of the dam material in the transportation process on the construction quality of filling the dam body is avoided by carrying out the supplementary sprinkling on the dam face before rolling, the problems of excessive rolling and insufficient rolling are avoided by carrying out the continuous compaction detection on the dam face after rolling the dam material, the filling quality of the rock-fill dam body is further ensured, the construction efficiency is improved, and the construction cost is also saved to a certain extent.
Description
Technical Field
The invention relates to the technical field of rockfill dam body construction, in particular to a rockfill dam body filling construction method.
Background
The main body of the rock-fill dam is filled with stone, matched with the dam built by impervious body, it is a kind of earth-rock dam, the advantage of this kind of dam is that can fully utilize the local natural material, can meet different geological conditions, the construction method is relatively simpler and more convenient, the shock resistance is good, its deficiency is that generally need to set up the construction diversion and flood discharge building outside the dam, the rock-fill dam body is divided into upstream spreading and cover weight, bedding material, special bedding material, transition material, main rock-fill material of upstream, downstream rock-fill material, drainage material area and rock-fill slope protection from upstream to downstream sequentially, need to carry on the filling work in the rock-fill dam body construction process, and the quality of the filling work is one of the important reasons influencing the rock-fill dam body quality;
the existing rockfill dam filling construction method is complex in flow and difficult to operate, the rationality of the dam filling design compaction standard cannot be verified before filling, various parameters such as physical, mechanical and permeability indexes of each filling material after rolling are provided for the design, difficulty is brought to filling construction, and the filling construction quality cannot be guaranteed.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a rock-fill dam filling construction method, which facilitates subsequent rolling work of a dam face by performing a leveling and paving operation after discharging, avoids the influence of water loss on the dam filling construction quality due to the water loss during transportation of the dam material by performing supplementary watering on the dam face before rolling, and avoids the problems of excessive rolling and insufficient rolling by performing continuous compaction degree detection on the dam face after rolling the dam material.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme: a rockfill dam filling construction method comprises the following steps:
the method comprises the following steps: rolling test
Before dam filling construction, according to design drawings and a partition shown by a supervision instruction, selecting representative dam materials in a specified stock ground, performing a field rolling test similar to actual construction conditions in a temporary stock yard at the upstream of a dam body, and verifying the rationality of a dam filling design compaction standard to obtain final filling construction parameters;
step two: paving dam material
Firstly, measuring the plane of a dam filling unit, discharging boundary lines of each area on a filling foundation surface layer by layer according to construction drawings, making obvious marks to check and accept the foundation surface, introducing an earth and rockfill balance computer software system before mining dam materials, carrying out mould, calculation and dynamic management on dam material allocation to ensure that a dam filling material allocation scheme is economical, feasible, reasonable and reliable, mining the filling material from a stone factory and transporting the filling material to a position of a dam body to be filled, then unloading the filling material to a region of the dam body to be filled and leveling paving materials;
step three: dam material supplement watering
Firstly, detecting the water content of the filling material of the dam face, and then taking water supplementing measures for a filling area according to the water content of the dam face until the water content of the dam face reaches a standard value;
step four: dam material rolling
According to the third step, after the water content of the dam surface reaches the standard, firstly adopting BW-75S small-sized vibration mill to mill the special bedding material of the dam surface, then adopting 25t self-propelled vibration mill to mill the large surface of the bedding material of the dam surface, and then adopting BS500 type battering ram to mill the left end and the right end of the dam surface and the local corner part at the joint of the bank slope tightly;
step five: quality inspection
According to the fourth step, after rolling, all polluted materials are removed, an acceleration sensor is installed on a vibration wheel of a vibration roller, then the rolled dam materials are rolled again through the vibration roller, when the vibration roller works in the vibration roller, the acceleration sensor continuously detects vibration signals of a vibration shaft, the vibration signals are collected through a compactness tester installed in a cab of the vibration roller, analysis and processing are carried out through a preset program to obtain a compaction value, rolling quality is continuously detected and evaluated, and a dam filling unit is checked and accepted after the detection is qualified.
The further improvement lies in that: in the first step, each test combination is not less than 6 multiplied by 10m in the test process, test units are arranged in the test field according to different layer thicknesses and rolling times, test groups are arranged according to the layer thicknesses, the distance between the groups is 2m, then various combinations are carried out in the test area according to parameters of different fillers, different layer thicknesses and different rolling times, and the filler rolling test is carried out to obtain various test results.
The further improvement lies in that: and in the second step, the filling dam material is transported by a 20t dump truck, the filling dam material is retreated on the compacted layer during discharging to form a dense material pile, the filling dam material is pushed to be flat by a YT220 bulldozer, and the discharging pile distance is calculated and fixed-point discharging is carried out before discharging according to the unit filling engineering quantity and the single truck transportation quantity.
The further improvement lies in that: and in the second step, in the process of pushing and paving the materials, the oversize stones filled with the dam materials are dug up by a back shovel and are transported to a rockfill area by a loader, after the dam materials are pushed to be flat, the oversize stones on the dam surface are dug out by the back shovel and are stacked in the rockfill area, and the oversize stones which are not locally removed are manually removed to the rockfill area.
The further improvement lies in that: and in the third step, the dam material is ensured to have the water content of more than 2 percent before being transported, and when the water content of the dam surface is less than or equal to 2 percent, a sprinkler is adopted for high-pressure spraying.
The further improvement lies in that: in the fourth step, the running direction and the paving direction of the vibration flat rolling are parallel to the axis of the dam, the rolling is carried out by adopting a forward and backward staggered distance method, and the rolling is sequentially extended to each unit in the forward and backward direction, so that the continuous construction is ensured, and the rolling times are determined according to the rolling test result.
The further improvement lies in that: in the fourth step, the walking speed of the vibration roller is controlled at 1 grade in the rolling process, the working quality, the frequency and the amplitude of the vibration roller are calibrated in time, the vibration roller is ensured to be always kept in good performance and state to be put into operation, and the compaction at the boundary of the upper bedding material and the transition material on the dam surface is performed by vibration flat rolling and seam riding.
The invention has the beneficial effects that: the invention verifies the rationality of the dam filling design compaction standard by carrying out a rolling test before filling the dam, provides various parameters such as physical, mechanical and permeability characteristic indexes of each filling material after rolling for the design, leads the dam face to be convenient for subsequent rolling operation by carrying out pushing and spreading operation after unloading, avoids the influence of the water loss of the dam material in the transportation process on the dam filling construction quality by carrying out supplementary sprinkling on the dam face before rolling, avoids the problems of excessive rolling and insufficient rolling by carrying out continuous compaction degree detection on the dam face after rolling the dam material, and further ensures the filling quality of the rock-fill dam.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the embodiment provides a rockfill dam filling construction method, which includes the following steps:
the method comprises the following steps: rolling test
Before dam filling construction, according to a design drawing and a subarea indicated by a supervision instruction, selecting a representative dam material in a specified stock ground, carrying out a field rolling test similar to actual construction conditions on a temporary stock ground at the upstream of a dam body, verifying the rationality of a dam filling design compaction standard to obtain final filling construction parameters, wherein each test combination is not less than 6 x 10m in the test process, test units are arranged in the test field according to different layer thicknesses and rolling passes, the number of test groups is arranged according to the layer thickness, the distance between the groups is 2m, and then various combinations are carried out in the test area according to parameters of different fillers, different layer thicknesses and different rolling passes to obtain various test results;
step two: paving dam material
Firstly, measuring the plane of a dam filling unit, discharging boundary lines of each area on the filling foundation surface layer by layer according to construction drawing, making obvious marks to check and accept the foundation surface, introducing an earth and stone balance computer software system before mining dam materials, carrying out mould, calculation and dynamic management on dam material allocation to ensure that the dam material allocation scheme of the dam body is economical, reasonable and reliable, mining the filling material from a stone factory and transporting the filling material to a position to be filled in the dam body, then unloading the filling material to the area to be filled in the dam body and carrying out leveling paving, transporting the filling material by a 20t dump truck, retreating and unloading on a compacted layer to form a dense material pile during unloading, leveling the filling material by a YT220 bulldozer, calculating unloading distance and carrying out fixed-point unloading according to the unit filling engineering quantity and the single truck transportation quantity before unloading, and in the process of leveling paving the material, digging the excess stones of the filling dam material by using a back shovel, transporting the excess stones to a rockfill area by using a loader, digging the excess stones on the dam surface by using the back shovel after the dam material is pushed to be flat, stacking the excess stones in the rockfill area, and manually removing the excess stones which are not locally removed to the rockfill area;
step three: dam material supplement watering
Firstly, detecting the water content of the filling material of the dam face, and then taking water supplementing measures for a filling area according to the water content of the dam face until the water content of the dam face reaches a standard value, ensuring that the water content of the dam material is more than 2% before transportation, and carrying out high-pressure spraying and sprinkling by using a sprinkling truck when the water content of the dam face is less than or equal to 2%;
step four: dam material rolling
According to the third step, after the water content of the dam surface reaches the standard, the BW-75S small-sized vibration mill is adopted to mill the special bedding material of the dam surface, then the 25t self-propelled vibration mill is adopted to mill the large surface of the bedding material of the dam surface, then, the left end and the right end of the dam surface and the local corner position of the bank slope joint are compacted by adopting a BS500 type impact rammer, the running direction and the material laying direction of the vibration flat rolling are parallel to the axis of the dam, the rolling adopts a driving and reversing staggered distance method, and the rolling is sequentially extended to each unit in the driving and reversing direction to ensure continuous construction, determining the rolling times according to the rolling test result, controlling the walking speed of the vibration roller to be 1 grade in the rolling process to be 2km/h, calibrating the working quality, frequency and amplitude of the vibration roller in time to ensure that the vibration roller always keeps good performance and state to be put into operation, and rolling the boundary of the bedding material and the transition material on the dam surface by using vibration flat rolling and seam riding;
step five: quality inspection
According to the fourth step, after rolling, all polluted materials are removed, an acceleration sensor is installed on a vibration wheel of a vibration roller, then the rolled dam materials are rolled again through the vibration roller, when the vibration roller works in the vibration roller, the acceleration sensor continuously detects vibration signals of a vibration shaft, the vibration signals are collected through a compactness tester installed in a cab of the vibration roller, analysis and processing are carried out through a preset program to obtain a compaction value, rolling quality is continuously detected and evaluated, and a dam filling unit is checked and accepted after the detection is qualified.
The rock-fill dam filling construction method verifies the rationality of the dam filling design compaction standard by carrying out a rolling test before filling the dam, provides various parameters such as physical, mechanical and permeability characteristic indexes of each filling material after rolling for the design, enables the dam face to be convenient for subsequent rolling operation by carrying out pushing and spreading operation after unloading, avoids the influence of the dam material on the dam filling construction quality due to water loss in the transportation process by carrying out supplementary sprinkling on the dam face before rolling, avoids the problems of excessive rolling and insufficient rolling by carrying out continuous compaction degree detection on the dam face after rolling the dam material, further ensures the rock-fill dam filling quality, optimizes the filling construction process, improves the construction efficiency and also saves the construction cost to a certain extent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A rockfill dam filling construction method is characterized in that: the method comprises the following steps:
the method comprises the following steps: rolling test
Before dam filling construction, according to design drawings and a partition shown by a supervision instruction, selecting representative dam materials in a specified stock ground, performing a field rolling test similar to actual construction conditions in a temporary stock yard at the upstream of a dam body, and verifying the rationality of a dam filling design compaction standard to obtain final filling construction parameters;
step two: paving dam material
Firstly, measuring the plane of a dam filling unit, discharging boundary lines of each area on a filling foundation surface layer by layer according to construction drawings, making obvious marks to check and accept the foundation surface, introducing an earth and rockfill balance computer software system before mining dam materials, carrying out mould, calculation and dynamic management on dam material allocation to ensure that a dam filling material allocation scheme is economical, feasible, reasonable and reliable, mining the filling material from a stone factory and transporting the filling material to a position of a dam body to be filled, then unloading the filling material to a region of the dam body to be filled and leveling paving materials;
step three: dam material supplement watering
Firstly, detecting the water content of the filling material of the dam face, and then taking water supplementing measures for a filling area according to the water content of the dam face until the water content of the dam face reaches a standard value;
step four: dam material rolling
According to the third step, after the water content of the dam surface reaches the standard, firstly adopting BW-75S small-sized vibration mill to mill the special bedding material of the dam surface, then adopting 25t self-propelled vibration mill to mill the large surface of the bedding material of the dam surface, and then adopting BS500 type battering ram to mill the left end and the right end of the dam surface and the local corner part at the joint of the bank slope tightly;
step five: quality inspection
According to the fourth step, after rolling, all polluted materials are removed, an acceleration sensor is installed on a vibration wheel of a vibration roller, then the rolled dam materials are rolled again through the vibration roller, when the vibration roller works in the vibration roller, the acceleration sensor continuously detects vibration signals of a vibration shaft, the vibration signals are collected through a compactness tester installed in a cab of the vibration roller, analysis and processing are carried out through a preset program to obtain a compaction value, rolling quality is continuously detected and evaluated, and a dam filling unit is checked and accepted after the detection is qualified.
2. The rockfill dam filling construction method according to claim 1, wherein: in the first step, each test combination is not less than 6 multiplied by 10m in the test process, test units are arranged in the test field according to different layer thicknesses and rolling times, test groups are arranged according to the layer thicknesses, the distance between the groups is 2m, then various combinations are carried out in the test area according to parameters of different fillers, different layer thicknesses and different rolling times, and the filler rolling test is carried out to obtain various test results.
3. The rockfill dam filling construction method according to claim 1, wherein: and in the second step, the filling dam material is transported by a 20t dump truck, the filling dam material is retreated on the compacted layer during discharging to form a dense material pile, the filling dam material is pushed to be flat by a YT220 bulldozer, and the discharging pile distance is calculated and fixed-point discharging is carried out before discharging according to the unit filling engineering quantity and the single truck transportation quantity.
4. The rockfill dam filling construction method according to claim 1, wherein: and in the second step, in the process of pushing and paving the materials, the oversize stones filled with the dam materials are dug up by a back shovel and are transported to a rockfill area by a loader, after the dam materials are pushed to be flat, the oversize stones on the dam surface are dug out by the back shovel and are stacked in the rockfill area, and the oversize stones which are not locally removed are manually removed to the rockfill area.
5. The rockfill dam filling construction method according to claim 1, wherein: and in the third step, the dam material is ensured to have the water content of more than 2 percent before being transported, and when the water content of the dam surface is less than or equal to 2 percent, a sprinkler is adopted for high-pressure spraying.
6. The rockfill dam filling construction method according to claim 1, wherein: in the fourth step, the running direction and the paving direction of the vibration flat rolling are parallel to the axis of the dam, the rolling is carried out by adopting a forward and backward staggered distance method, and the rolling is sequentially extended to each unit in the forward and backward direction, so that the continuous construction is ensured, and the rolling times are determined according to the rolling test result.
7. The rockfill dam filling construction method according to claim 1, wherein: in the fourth step, the walking speed of the vibration roller is controlled at 1 grade in the rolling process, the working quality, the frequency and the amplitude of the vibration roller are calibrated in time, the vibration roller is ensured to be always kept in good performance and state to be put into operation, and the compaction at the boundary of the upper bedding material and the transition material on the dam surface is performed by vibration flat rolling and seam riding.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114438969A (en) * | 2022-02-11 | 2022-05-06 | 中国水利水电第五工程局有限公司 | Construction method suitable for mining, blending and filling of high earth-rock dam gravel soil materials |
| CN114592484A (en) * | 2022-03-14 | 2022-06-07 | 中国恩菲工程技术有限公司 | Waste rock dam and waste rock dam building method |
| CN114687323A (en) * | 2022-05-18 | 2022-07-01 | 甘肃第六建设集团股份有限公司 | Seepage-prevention construction method for semi-reservoir seepage-prevention high-fill silty loam homogeneous dam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114438969A (en) * | 2022-02-11 | 2022-05-06 | 中国水利水电第五工程局有限公司 | Construction method suitable for mining, blending and filling of high earth-rock dam gravel soil materials |
| CN114592484A (en) * | 2022-03-14 | 2022-06-07 | 中国恩菲工程技术有限公司 | Waste rock dam and waste rock dam building method |
| CN114687323A (en) * | 2022-05-18 | 2022-07-01 | 甘肃第六建设集团股份有限公司 | Seepage-prevention construction method for semi-reservoir seepage-prevention high-fill silty loam homogeneous dam |
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Application publication date: 20210420 |