JP5107673B2 - Management method of embankment density - Google Patents

Description

  The present invention relates to a method for managing embankment density, and more particularly, a method for managing embankment density so that a predetermined amount of embankment material is spread over a predetermined range and compacted to obtain a compacted layer with a predetermined density. About.

As a conventional method for measuring the embankment density, a method of measuring the density by collecting a test body from the compaction layer, a method by sand substitution that measures the density by filling the hole formed in the compaction layer with sand, There are density measurement method by RI, flat plate loading test, density management by impact, and the like.
However, in the above-mentioned conventional method, it is impossible to measure unless the finished embankment surface is destroyed, and since it is a sampling test, it is necessary to measure several locations according to the embankment amount, and it takes too much time. There is a drawback in that it is difficult to measure density on the finished surface with unevenness.

  In addition, as a conventional technique for measuring the embankment density in real time, there are a method for confirming the current density by measuring the settlement amount of the compacting machine and a method for measuring the settlement amount with a laser level measuring instrument. However, in the above-mentioned conventional real-time measurement technology, the density calculation is based on the amount of embankment subsidence using the data from the preliminary rolling test, so the measurement results lack accuracy due to on-site conditions and can only be used to the finished target level. There is a drawback that it cannot be done.

Other than those described above, Patent Document 1 describes a banking compaction management method using a GPS system. This consists of a reference station equipped with a GPS receiver, a rolling work vehicle equipped with a GPS receiver that is linked to the reference station, and a receiving station that receives information from the compaction work vehicle. Is provided with a density measuring device including a compaction density sensor. The measurement result by this density measuring device is transmitted to the receiving station together with the position data, and the degree of compaction is obtained by data processing of the measurement result and the position data.
In Patent Document 1, means that can be used as a density measuring device include a RI type moisture / density measuring device, an electromagnetic wave type compaction degree measuring device, and a method for estimating the degree of compaction from a waveform measured by an accelerometer. It is stated that there is.
However, even if any density measuring device is installed in the compacting work vehicle, there are many variations in the data obtained from these, the accuracy of compaction estimated from such data is poor, and practical application is difficult. There is a drawback of being.

In Patent Document 2, a ground response value is calculated using an acceleration waveform indicating a temporal change in vibration acceleration of a vibration roller in a compacting machine, and an actual measurement value of the degree of compaction in a compacting area is calculated from the calculated value. Although an estimation method is described, in this case as well, since the compaction density is obtained indirectly by the vibration acceleration of the vibration roller, there remains a problem regarding reliability.
Japanese Patent No. 3500905 Japanese Patent No. 3542780

  The present invention has been proposed in view of the current situation as described above, and provides a banking density management method capable of managing the degree of compaction with high accuracy and in real time regardless of the shape of the banking. It is.

  In the present invention, the above problems are solved by means (1) to (3) described below.

(1) A predetermined amount of embankment material is transported from the storage location to the compacting construction area, and after the embedding material is spread over a predetermined range of the compacting construction area, the embedding material is compacted to form a compacted compaction layer. fill density so as to obtain a method for managing, prior to forming the compacted layer in a predetermined range of the compaction construction area, as a test construction, leveling spread the fill material to the compaction construction area The surface before and after forming a compaction layer by forming a compaction layer, measuring a specimen taken from the compaction layer to determine the density as an actual measurement value, and forming the compaction layer obtained by a three-dimensional measurement means calculated density as operation value from the mass shape and fill material, it obtains a correction coefficient from these measured values and the calculated value, the use of the correction factor for the calculation of the density of the compacted layer in the overlay soil density evaluation step It shall be the feature Soil density management method.

(2) A predetermined amount of embankment material is transported from the storage location to the compaction construction area, and the embedding material is spread over a predetermined area of the compaction construction area, and then the embedding material is compacted to form a compaction layer with a predetermined density. It is a method for managing the embankment density so as to obtain the embankment necessary for measuring the moisture content of the embankment material at the storage location and using the moisture content to form the compaction layer in the predetermined range. Mass calculation step for calculating the mass of the material, and a surface that measures the ground surface shape of the predetermined area of the compaction construction area as a surface shape by a three-dimensional measuring means such as a three-dimensional laser scanner before spreading and filling the embankment material After the shape measuring step, the embedding material of the mass is spread over the predetermined range and compacted to a predetermined level by a compacting machine, the surface shape of the compacted layer is measured as a compacted shape by the three-dimensional measuring means. The density of the compacted layer is calculated using the compacted shape measuring step, the compacted shape, the surface shape, and the mass of the embankment material obtained in the mass calculating step, and the compacted embankment has a predetermined density. Including an embankment density evaluation process for evaluating whether or not the embankment has reached, and when the compacted embankment reaches a predetermined density, the process proceeds to a process of forming another compaction layer and the predetermined density is not reached. the, in the compaction step and the embankment density evaluation step and repeat to managing Sheng soil density reaches a predetermined density, prior to forming the compacted layer in a predetermined range of the compaction construction area, As test construction, a compaction layer is formed by spreading and compacting the embankment material in a construction area, measuring a specimen taken from the compaction layer, and determining a density as an actual measurement value; and , Tightening determined by the three-dimensional measuring The density is calculated as the calculated value from the surface shape before and after the formation of the ground layer and the mass of the embankment material, and the correction coefficient is obtained from the measured value and the calculated value, and the density of the compaction layer in the embedding density evaluation process is calculated. managing Sheng soil density you characterized by using said correction factor.

(3) After forming the spreading layer by spreading the mass of the embankment material obtained in the mass calculation step in the predetermined range, and before compacting the spreading layer, A leveling shape measuring step is performed in which the surface shape is measured as a leveled shape by a three-dimensional measuring means, and the leveling shape, the surface shape, and the mass of the embankment material obtained in the mass calculation step are used to spread the surface shape. It calculates the density of the leveling layer, and uses the calculated density of the leveling layer to calculate the target value of the leveling height of the embankment material in the process of forming another compaction layer. The banking density management method according to claim 2 .

In the method for managing embankment density according to (1) to (3), the three-dimensional laser scanner exemplified as the three-dimensional measuring means is a conventional device, and this is the time for the laser pulse to reciprocate between the measurement object and the sensor. Is measured to measure the distance, and the direction in which the laser beam is emitted is measured to obtain the three-dimensional coordinates of the measurement target point.
Therefore, in the present invention, in a predetermined range of the construction area, after the base surface shape, which is the ground surface shape before carrying the embankment material, and the spread shape, which is the surface shape of the spread embankment material, after compaction The compacted shape, which is the surface shape of the embankment material, is composed of three-dimensional coordinates of a large number of measurement points. The volume of the spread embankment material is calculated from the three-dimensional coordinate data constituting the base surface shape and the spread shape to the virtual plane, and from the spread surface to the virtual plane. It can be obtained by performing a calculation process such as Va−Vb between the volume Va and the volume Vb from the base surface to the virtual plane. Further, the volume of the compacted embankment material can be obtained from a large number of three-dimensional coordinate data constituting the base surface shape and the compacted shape by a similar calculation method. The step of calculating the volume from the surface shape data is executed by a function incorporated in the three-dimensional laser scanner itself or by another computer.

In the mass calculation step (1), the water content ratio can be obtained by, for example, drying a sample sampled from the embankment material (wet state) at the storage location and measuring the moisture content.
In addition, the range in which the compaction process is performed at once in the construction area, that is, the area and the compaction height, are preset according to the construction plan and design data, and the design dry density of the compaction layer is also preset. ing. Therefore, the mass of the embankment material (wet state) used in one compaction process can be obtained by the following equation (1).
M = V × γd ₀ × (1 + w / 100)... Equation (1)
M: Mass of embankment material used in one compaction process V: Volume of compaction layer formed in one compaction process γd ₀ : Design dry density of compaction layer w: Water content ratio The volume V of the compaction layer is determined by V = A × h from the area A of the compaction layer and the compaction height h.
It is calculated | required by calculation like.

In the embankment density evaluation step (1), the dry density of the compacted layer can be obtained by the following equation (2).
γd ₁ = γt ₁ / (1 + w / 100)... Equation (2)
γd ₁ : dry density of compaction layer γt ₁ : wet density of compaction layer w: moisture content of embankment material

Here, the wet density (γt ₁ ) of the compacted layer is obtained by the following equation (3).
γt ₁ = M / V (3)
γt ₁ : wet density of compaction layer M: mass of embankment material used for forming compaction layer V: volume of compaction layer (calculated from base shape and compaction shape)

In the embankment density management method of (2), the density as an actual measurement value can be calculated by taking a specimen from a compacted layer formed by test construction and measuring the volume and weight of the specimen. it can.
Here, when the calculated value obtained from the base surface shape and compacted shape by the three-dimensional measuring means, and the mass of the embankment material is the dry density, the dry density is obtained from the test specimen by the dry weight, and the measured value is obtained. The correction coefficient (α) is obtained by the following equation (4).
Correction coefficient (α) = actual measurement value / calculated value (4)

In the method for managing embankment density in (3) above, the dry density (γd ₂ ) obtained from the embankment material spread in a predetermined range in the test construction or other step of forming the compacted layer, that is, the spread dry density Is used to determine the spread wet density (γt ₂ ), and the target value (ΔH) of the spread height of the embankment material in the process of forming a new compacted layer from this wet density (γt ₂ ). It is obtained by calculation.
Here, the spread wet density (γt ₂ ) is obtained by the following equation (5).
γt ₂ = γd ₂ × (1 + w / 100)... Equation (5)
γd ₂ : Drying density of spreading layer γt ₂ : Wet density of spreading layer w: Moisture content of embankment material used for compaction process And the target value (ΔH) of spreading height is When the mass (M) of the leveling material is divided by the leveling wet density (γt ₂ ) and further divided by the area (A) within the range where the leveling material is leveled, the following equation (6) is obtained. ΔH can be obtained.
ΔH = M / γt ₂ / A (6)
M: Mass of embankment material used for one compaction process γt ₂ : Wet density of spreading layer A: Area in a range where one compaction process is performed

  In the embankment density management method of the present invention, the moisture content and mass of the embedding material used for compaction are obtained, the surface shape before and after the embedding material is spread in the compacting construction area, and after the embedding material is compacted. The surface shape is obtained using a three-dimensional measuring means such as a three-dimensional laser scanner, and the compaction layer density is calculated from these data to control the compaction level. Can be managed in real time. Therefore, by adjusting the number of compactions while grasping the density of the compaction layer in real time, even if the upper and lower limits of density management of the compaction layer are set within a relatively narrow range. However, this can be achieved with high accuracy.

In the present invention, if necessary, test construction may be performed in advance, a specimen is collected from the compacted layer, the density is measured, and the correction coefficient may be obtained from the actual measurement value.
That is, in the present invention, in this construction, the volume of the compaction layer is obtained using a three-dimensional measuring means such as a three-dimensional laser scanner, and the compaction density is calculated from the mass of the embankment material, thereby managing the embankment density. Therefore, in the test construction, the compaction density and the correction coefficient are obtained from the specimens actually collected from the compaction layer, and the compaction density by the three-dimensional measuring means is corrected accordingly, and the embankment density is managed. For example, it is possible to manage the degree of compaction of the banking with high accuracy.

  In the embankment density management method of the present invention, it is preferable to obtain the calculation density of the spreading layer by measuring the surface shape of the spread embankment material with a three-dimensional measuring means, and using this spreading density, The target value of the spread height of the embankment material in the step of forming another compaction layer can be calculated. If the construction management is carried out using the target value of the leveling height, the leveling work of the embankment material can be performed efficiently and with high accuracy, and the subsequent compaction process of the embankment can be smoothly advanced. be able to.

  Hereinafter, although embodiment of this invention is described, this invention is not limited to this.

[Test construction]
In the embankment density management method of the present invention, it is preferable to perform test construction first. In the test construction, the density of the leveling layer and the density of the compaction layer are obtained by three-dimensional measurement, and tightening is performed by actually measuring the specimen. The density of the compacted layer is obtained, and the correction coefficient is obtained from the density of the compacted layer.
If this test construction is explained according to the flowchart of FIG. 1, first, the moisture content of the embankment material is measured in STEP 1, the initial setting value is input in STEP 2, and the surface shape of the ground surface where the test construction is carried out in STEP 3. 3D measurement. These steps 1 to 3 may be executed simultaneously, or may be executed by changing the order as appropriate.
Here, STEP 1 collects a predetermined amount of embankment material in a storage warehouse or stock yard, measures the mass in its wet state, and then puts this embedding material into a drying furnace, for example, and then masses it again. By measuring the water content ratio of the wet embankment material is calculated. The water content ratio thus determined is input to a control device such as a computer used for embankment compaction.
In STEP 2, target values of the area, height, and dry density of the compacted layer formed by the test construction are input as management data to a control device such as the computer.
In STEP 3, the shape of the ground surface on which the compaction layer is formed by the test construction is measured by a three-dimensional measuring device such as a three-dimensional laser scanner, and the three-dimensional coordinate data of a large number of measurement points on the ground surface is used as the base surface shape data. The base surface shape data is obtained and input to the control device such as the computer.

When the steps 1 to 3 are completed, the mass (M) of the embankment material necessary for forming the compaction layer as the test work is calculated as the step 4 by the control device such as the computer. Use to calculate.
M = V × γd ₀ × (1 + w / 100)... Equation (1)
V: Volume of compaction layer formed in test construction γd ₀ : Target value of dry density of compaction layer input in STEP 2 w: Moisture content ratio determined in STEP 1 Here, the volume V of the compaction layer is From the target value of the area A and the height h of the compaction layer input in STEP2, the calculation is performed as V = A × h.

  The embankment material with the mass (M) calculated in STEP 4 is transported from the storage warehouse or stock yard to the construction area by means of transportation such as a truck or belt conveyor, and this embedding material is spread over the construction area as STEP 5 The surface shape of the leveling layer is measured as a STEP 6 by a three-dimensional measuring device such as a three-dimensional laser scanner, and three-dimensional coordinate data of a number of measurement points on the leveling surface is obtained as leveling shape data. The shape data is input to a control device such as the computer.

Next, as STEP 7, the drying density (γd ₂ ) of the spreading layer is obtained by calculation.
The dry density (γd ₂ ) of the spread layer is determined by the following equation (7).
γd ₂ = γt ₂ / (1 + w / 100) (7)
γd ₂ : Drying density of spreading layer γt ₂ : Wetting density of spreading layer w: Moisture content of embankment material obtained in STEP 1 Here, the wet density (γt ₂ ) of spreading layer is measured in STEP 3 The volume (V) of the spread layer is obtained from the measured base surface shape data and the spread shape data measured in STEP 6, and the mass (M) of the spread embankment material is calculated. When divided by the volume (V), the wet density (γt ₂ ) of the spreading layer is obtained as shown in Equation (5).
γt ₂ = M / V (5)
γt ₂ : wet density of spreading layer M: mass of embankment material calculated in STEP 4 V: volume of spreading layer

Next, as STEP 8, when the dry density (γd ₂ ) of the spread layer is compared with the target value (γd ₀ ) of the dry density of the compaction layer input in STEP 2, and γd ₂ ≦ γd _0. Advances to the next STEP 9, and if γd ₂ ≦ γd ₀ does not hold, the drying density of the spreading layer has already reached the target value of the drying density of the compaction layer, and the process advances to STEP 13.

Next, as STEP 9, for example, the spreading layer is compacted once by a compacting device such as a rolling roller to form a compacted layer. As STEP 10, the surface shape of this compacted layer is changed to a three-dimensional laser scanner or the like. The three-dimensional measuring device is used to obtain three-dimensional coordinate data of a large number of measurement points in the compaction layer as compaction shape data, and the compaction shape data is input to a control device such as the computer. Then, from these data, as STEP 11, the dry density (γd ₁ ) of the compacted layer is obtained by calculation.
The dry density (γd ₁ ) of this compacted layer is determined as shown in equation (2).
γd ₁ = γt ₁ / (1 + w / 100)... Equation (2)
γd ₁ : Drying density of the compaction layer γt ₁ : Wet density of the compaction layer w: Water content ratio of the embankment material obtained by STEP 1 Here, the wet density (γt ₁ ) of the compaction layer is obtained by the formula (3) γt ₁ = M / V (3)
γt ₁ : Wet density of the compaction layer M: Mass of the embankment material calculated in STEP 4 V: Volume of the compaction layer (calculated from the base surface shape data obtained in STEP 3 and the compaction shape data obtained in STEP 10 )

Next, in STEP 12, the dry density (γd ₁ ) of the compacted layer compacted once by the compaction device is compared with the target value (γd ₀ ) of the dry density of the compacted layer input in STEP2. .
When γd ₁ ≧ γd ₀ , the dry density of the compaction layer has already reached the target value, so the process proceeds to the next STEP 13. When γd ₁ ≧ γd ₀ is not satisfied, the dry density of the compaction layer is Since the target value has not been reached, the process returns to STEP 9, and the compaction process by the compaction device is executed once again, and STEPs 10 to 12 are repeated.

In STEP 13, a specimen is collected from the compacted layer compacted to the target value (γd ₀ ) of the dry density, and the dry density (γd ₃ ) as an actual measurement value is obtained from this specimen. Here, after obtaining the volume from the specimen, the dry weight is obtained using a drying furnace, and the dry density is obtained as an actual measurement value of the compacted layer by dividing the dry weight by the volume.
Then, in STEP14, the dry density (γd ₃ ) as the actually measured value is divided by the dry density (γd ₁ ) of the compacted layer obtained by calculation in STEP11, thereby correcting as shown in the equation (4). The coefficient (α) is obtained.
Correction coefficient (α) = actual value / calculated value = γd ₃ / γd ₁ Equation (4)

[Main construction]
As described above, when the test construction from STEP 1 to STEP 14 is completed, next, as the main construction, a construction for compacting the embankment material within a predetermined range is performed.
If this construction is explained according to the flowchart of FIG. 2, first, the moisture content of the embankment material is measured in STEP 20, the initial setting value is input in STEP 21, and the surface shape of the ground surface on which the construction is carried out in STEP 22 is determined. Three-dimensional measurement. These steps 20 to 22 may be executed at the same time, or may be executed by appropriately changing the order.
Here, in STEP 20, the moisture content of the embankment material in the storage warehouse or stock yard is obtained in the same manner as in STEP 1 of the test construction, and this is input to a control device such as a computer.
In STEP 21, the area of the compaction layer, the target value of the height and the dry density in the range where the compaction process is performed at once in the construction area, and the dry density (γd ₂ ) of the spread layer are controlled by a control device such as a computer. To enter as management data. Here, as the drying density (γd ₂ ) of the spread layer, the one obtained in STEP 7 of the test construction can be used, or the one obtained when another compaction layer is formed can be used. . In addition, when the target values of the area, height, and dry density of the compaction layer are set in advance for all compaction layers to be constructed multiple times according to the construction plan and design data, these are input at once, Thereafter, when other compaction layers are formed, they may be omitted.
In STEP 22, the shape of the ground surface in the range where the compaction process is carried out is measured by a three-dimensional measuring device in the same manner as in STEP 3 in the test construction, and the base surface shape data is input to a control device such as a computer.

  When each step of STEP20 to 22 is completed, as STEP23, the mass (M) of the embankment material necessary for the compaction layer to be formed is calculated in the same manner as in STEP4 of the test construction, and further, as STEP24, The target value (ΔH) of the spread height is calculated.

The target value (ΔH) of the spread level is determined by dividing the mass (M) of the embankment material obtained in STEP 23 by the spread and wet density (γt ₂ ), and then the area in the range where the embankment material is spread ( When divided by A), ΔH can be obtained as shown in the following equation (6).
ΔH = M / γt ₂ / A (6)
M: Mass of embankment material used for one compaction process γt ₂ : Wetting density of spreading layer A: Area within a range where one compacting process is carried out Here, spreading wet density ( γt ₂ ) is the dry density (γd ₂ ) obtained from the embankment material spread in a predetermined range at the time of test construction or in the process of forming another compaction layer, that is, the spread dry density is used. It is obtained by equation (5).
γt ₂ = γd ₂ × (1 + w / 100)... Equation (5)
γd ₂ : Drying density of spreading layer γt ₂ : Wetting density of spreading layer w: Moisture content of embankment material used in compaction process

Next, in STEP 25, the embankment material having the mass (M) obtained in STEP 23 is transported to the construction area, the embedding material is spread on the construction area, and the surface shape of the spread layer is defined as STEP 26 in three dimensions. Measurement is performed by a three-dimensional measuring device such as a laser scanner, and the spread shape data is input to a control device such as the computer. In STEP 27, the dry density (γd ₂ ) of the spread layer is obtained.
In STEP 25 to STEP 27 described above, the same steps as those in STEP 5 to STEP 7 for test construction are performed.

Next, in STEP 28, the drying density (γd ₂ ) of the spread layer is compared with the target value (γd ₀ ) of the drying density of the compaction layer input in STEP 21, and when γd ₂ ≦ γd ₀ is satisfied. Executes the following STEP 29 to STEP 31, proceeds to STEP 32, and obtains a correction value by multiplying the dry density (γd ₂ ) of the compacted layer obtained in STEP 31 by the correction coefficient (α). Here, in STEP29 to STEP31, the same steps as in STEP9 to STEP11 of the test construction are performed. As the correction coefficient (α), the value obtained in STEP 14 of the test construction is used.
On the other hand, if γd ₂ ≦ γd ₀ is not satisfied in STEP 28, the drying density of the spreading layer has already reached the target value of the drying density of the compaction layer. The dry density (γd ₂ ) is regarded as the dry density (γd ₁ ) of the compacted layer, and a correction value is obtained by multiplying γd ₂ by a correction coefficient (α).

In STEP 33, the correction value obtained in STEP 32 is compared with the target value (γd ₀ ) of the dry density of the compacted layer. If correction value ≧ target value (γd ₀ ), the tightening from STEP 20 to STEP 33 is performed. The compacted layer forming step is completed, and the process proceeds to the step of forming the next compacted layer.
On the other hand, if the correction value ≧ target value (γd ₀ ) is not satisfied in STEP 33, it is considered that the dry density of the compaction layer has not yet reached the target value, and the process returns to STEP 29, where the correction value ≧ target value (γd ₀ ). Until the condition is satisfied, STEPs 29 to 33 are repeatedly executed.

It is the flowchart which showed the test construction selectively implemented in the management method of the banking density of this invention. It is the flowchart which showed the management method of the banking density of this invention.

Claims (3)

A predetermined amount of embankment material is transported from the storage location to the compacting area, and after the embankment material is spread over the predetermined area of the compacting area, the embankment material is compacted so that a compacted layer with a predetermined density can be obtained. A method for managing the embankment density,
Prior to forming the compacted layer in a predetermined range of the compaction construction area, as a test construction, to form a compacted layer by compacting the fill material smoothed spread compaction construction area, the clamping Measure the specimen collected from the compacted layer to determine the density as an actual measurement value, and calculate the density as the calculated value from the surface shape before and after forming the compacted layer and the mass of the embankment material obtained by the three-dimensional measuring means. obtains a correction coefficient from these measured values and the calculated values, the management method of Sheng soil density you characterized by the use of the correction factor for the calculation of the density of the compacted layer in the overlay soil density evaluation step. A predetermined amount of embankment material is transported from the storage location to the compacting area, and after the embankment material is spread over the predetermined area of the compacting area, the embankment material is compacted so that a compacted layer with a predetermined density can be obtained. A method for managing the embankment density,
A mass calculation step of measuring the moisture content of the embankment material at the storage location, and using the moisture content ratio to determine the mass of the embankment material necessary for forming the compaction layer in the predetermined range,
Before leveling laid embankment material, the front surface shape measuring step of measuring the ground surface shape of the predetermined range of the compaction construction area by steric measuring means such as a three-dimensional laser scanner as a table surface shape,
A compaction shape measuring step of measuring the surface shape of the compaction layer as a compacted shape by the three-dimensional measuring means after leveling the embankment material of the mass in the predetermined range and compacting to a predetermined extent by a compaction machine; ,
The density of the compacted layer is calculated using the compacted shape, the surface shape, and the mass of the embankment material obtained in the mass computation step, and whether or not the compacted embankment has reached a predetermined density is evaluated. Including the embankment density evaluation process,
When the compacted embankment reaches a predetermined density, the process proceeds to a process of forming another compacted layer. When the embankment does not reach the predetermined density, the compaction process and the embankment density evaluation until the predetermined density is reached. in repeat to managing Sheng soil density and a step,
Prior to forming the compacted layer in a predetermined range of the compaction construction area, as a test construction, to form a compacted layer by compacting the fill material smoothed spread compaction construction area, the clamping Measure the specimen collected from the compacted layer to determine the density as an actual measurement value, and calculate the density as the calculated value from the surface shape before and after forming the compacted layer and the mass of the embankment material obtained by the three-dimensional measuring means. obtains a correction coefficient from these measured values and the calculated values, the management method of Sheng soil density you characterized by the use of the correction factor for the calculation of the density of the compacted layer in the embankment density evaluation step. After forming the spreading layer by spreading the embankment material of the mass determined in the mass calculation step within the predetermined range, and before compacting the spreading layer, the surface shape of the spread embankment material is A leveling shape measuring step for measuring as a leveled shape by a three-dimensional measuring means is performed, and a leveling layer is formed using the leveled shape, the surface shape, and the mass of the embankment material obtained in the mass calculation step. And calculating a target value of the leveling height of the embankment material in the step of forming another compaction layer using the calculated density of the leveling layer. Item 3. The embankment density management method according to Item 2 .

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