Slope earth and stone excavation and backfill rapid calculation method based on CORS measurement system

Abstract

The invention belongs to the technical field of earth-rock engineering, and particularly relates to a slope earth-rock excavation backfill rapid calculation method based on a CORS measuring system, which comprises the following steps: A1, surveying backfill site topographic data by finding the CORS measuring system, and collecting physical properties of slope area soil in a surveying excavation site; a2, an excavation scheme and a backfill scheme are set according to survey data, and an excavation site and a backfill site are cleaned at the same time; a3, soil and stone are excavated on the excavation site according to the excavation scheme, the soil and stone are conveyed to the backfill site through the transfer equipment, and the soil and stone are backfilled on the backfill site; a4, compaction equipment is used for compacting soil and stones on the backfill site, the slope stability of the excavation site is monitored, and a maintenance scheme is set; the method is matched with calculation of a W numerical value, the stability of the excavated slope can be estimated, regulated and controlled, meanwhile, the W numerical value can serve as a required variable for construction cost control, and therefore construction safety and construction efficiency are kept and improved.

Description

Technical Field

[0001] The invention belongs to the technical field of earthwork engineering, and in particular to a rapid calculation method for slope earthwork excavation and backfilling based on a CORS measurement system. Background Art

[0002] With the acceleration of urbanization, various infrastructure construction projects have sprung up. Among these numerous construction projects, high slope earthwork excavation and backfilling projects are particularly important. High slope projects are not only related to the overall beauty of the city, but also directly related to the stability and safety of the city. Therefore, it is particularly important to ensure the quality and progress of high slope projects. In this process, accurate calculation of earthwork excavation and backfilling volume becomes a crucial link.

[0003] Accurately calculating the amount of excavation and backfill can not only effectively control the project cost, but also ensure the smooth progress of the project. Through accurate calculation of the amount of excavation and backfill, engineers can better arrange the construction plan, reasonably allocate resources, and avoid unnecessary waste. In addition, accurate calculation can also help the construction team discover potential problems in advance and take timely measures to make adjustments, thereby ensuring that the quality of the project is not affected.

[0004] In the traditional earthwork calculation process, it mainly relies on manual measurement and calculation. This method not only requires a lot of time and labor, but also the accuracy of its calculation results is difficult to guarantee. Due to the limitations of manual measurement and calculation, it often leads to large data errors, thus affecting the progress and quality of the entire project.

[0005] To this end, the present invention provides a rapid calculation method for slope earthwork excavation and backfilling based on a CORS measurement system. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system of the present invention comprises the following steps:

[0008] A1. Use the Qianxun CORS measurement system to survey the topographic data of the backfill site and collect the physical properties of the soil in the slope area of ​​the excavation site;

[0009] A2. According to the survey data, set the excavation plan and backfill plan, and clean up the excavation site and backfill site at the same time;

[0010] A3. Excavate soil and rocks at the excavation site according to the excavation plan, transport the soil and rocks to the backfill site through transfer equipment, and backfill the soil and rocks at the backfill site;

[0011] A4. Use compaction equipment to compact soil and rock at the backfill site, monitor the stability of the slope at the excavation site, and set up a maintenance plan.

[0012] Preferably, collecting and surveying the physical properties of the soil includes:

[0013] The natural density of the slope soil at the excavation site is denoted as γ;

[0014] The cohesion of the slope soil at the excavation site is denoted as c;

[0015] The internal friction angle of the slope soil at the excavation site is denoted as φ;

[0016] The surveyed terrain data includes:

[0017] The volume of earth and rock excavated is denoted as V;

[0018] The height of the slope at the excavation site is denoted as H 初 ;

[0019] The length of the bottom surface of the slope at the excavation site, denoted as L 初 ;

[0020] The angle between the slope of the excavation site and the horizontal plane is denoted as α;

[0021] Among them, when the slope excavates V volume of earth and rock, the longitudinal length of the slope required for construction on site is W.

[0022] Preferably, the excavation scheme comprises the following steps:

[0023] B1. When the safety factor at the slope excavation site is 1, calculate the slope inclination angle after excavation at the slope excavation site, denoted as α max ;

[0024] B2. When the safety factor at the slope excavation site is 1, calculate the cross section of the slope after the slope is excavated on site, denoted as M;

[0025] B3. Based on the required volume of soil and rock for backfilling at the site, calculate the longitudinal length of the slope required for construction when excavating V volume of soil and rock for the slope.

[0026] Preferably, the step of calculating the safety factor of the slope at the slope excavation site includes:

[0027] D1. Divide the slope of the excavation site into n vertical strips of width b;

[0028] D2, set the arc sliding surface;

[0029] D3. Calculate the deadweight G, sliding force T, anti-sliding force S and safety factor F of the vertical soil strip sPreferably, the vertical soil strips are numbered i;

[0030] The calculation method of the deadweight G of the vertical soil strip is:

[0031] G i =γbh i ,h i is the height of the i-th soil strip;

[0032] The calculation method of the sliding force T under the vertical soil strip is:

[0033] T i =G i sinα;

[0034] The calculation method of the vertical soil strip anti-sliding force T is:

[0035] S i =(c+G i cosαtanφ)Δl i , where Δl i is the length of the bottom of the i-th soil strip; the slope safety factor F s The calculation method is:

[0036]

[0037] When the safety factor at the slope excavation site is 1, calculate α max The method is:

[0038] Let n = 1, then b = L 初 ,at this time, Let F s =1, then Gsinα max =(c+Gcosα max tanφ)Δl, inversely derive α max Preferably, the length of the bottom surface of the slope excavation site after excavation is L1;

[0039]

[0040] Among them, M is calculated as follows:

[0041]

[0042] Preferably, in F s =1, the calculation method of W is:

[0043]

[0044] Preferably, the backfilling scheme comprises the following steps:

[0045] C1. Calculate the compaction coefficient K based on the soil density at the backfill site and the density of the excavated soil and rock;

[0046] C2. Use the Qianxun CORS measurement system to survey the volume V of the backfill foundation pit on site 容 , and establish V 容 The functional relationship between V and

[0047] C3. After backfilling, test the actual density of soil and rock at the backfilling site and record it in the report.

[0048] Preferably, the minimum value of the compaction coefficient K is min =Soil density at backfill site / density of excavated soil and rock.

[0049] Preferably, V 容 The functional relationship of V is:

[0050] V=KV 容 .

[0051] The beneficial effects of the present invention are as follows:

[0052] 1. The present invention uses the cors measurement system, which does not require the installation of a reference station. It can be fixed as soon as it is turned on and a detailed topographic map can be measured, which greatly improves the measurement accuracy, thereby improving the accuracy of the calculation of earthwork excavation and backfilling. The excavation and backfilling volume of the site leveling can be quickly and accurately calculated, which is convenient for on-site construction, greatly improves the calculation efficiency, saves a lot of time, and avoids the problems of long survey cycle, high labor intensity, and cumbersome internal data of traditional methods. At the same time, it is not only suitable for high slope earthwork excavation and backfilling projects, but also suitable for other types of earthwork projects, and has strong adaptability.

[0053] 2. The present invention regards the excavated slope as a whole, calculates the maximum inclination angle of the slope under the limit equilibrium state according to the Swedish distribution, and calculates the minimum construction length under the limit equilibrium state according to the volume of soil and rock required for backfilling. Before excavation, the construction length value is adjusted to keep the inclination angle of the slope after excavation below α. max , thereby maintaining the stability of the slope after excavation. At the same time, in order to save construction costs, the construction length is adjusted according to the working cost of the excavation equipment. By calculating the W value, not only can the stability of the slope after excavation be estimated and regulated, but it can also be used as a required variable for construction cost control, thereby maintaining and improving construction safety and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The present invention will be further described below in conjunction with the accompanying drawings.

[0055] Figure 1 It is a flow chart of the calculation method of slope earthwork excavation and backfilling in the present invention;

[0056] Figure 2 is a flow chart of the excavation scheme in the present invention;

[0057] Figure 3 is a flow chart of the backfilling scheme in the present invention;

[0058] Figure 4 It is a flow chart for calculating the safety factor of the slope at the slope excavation site in the present invention. DETAILED DESCRIPTION

[0059] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0060] like Figures 1 to 4 As shown, the rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system of the present invention comprises the following steps:

[0061] A1. Use the Qianxun CORS measurement system to survey the topographic data of the backfill site and collect the physical properties of the soil in the slope area of ​​the excavation site;

[0062] The physical properties of the soil collected and surveyed include:

[0063] The natural density of the slope soil at the excavation site is denoted as γ;

[0064] The cohesion of the slope soil at the excavation site is denoted as c;

[0065] The internal friction angle of the slope soil at the excavation site is denoted as φ;

[0066] The surveyed terrain data includes:

[0067] The volume of earth and rock excavated is denoted as V;

[0068] The height of the slope at the excavation site is denoted as H 初 ;

[0069] The length of the bottom surface of the slope at the excavation site, denoted as L 初 ;

[0070] The angle between the slope of the excavation site and the horizontal plane is denoted as α;

[0071] Among them, when the slope excavates V volume of earth and rock, the longitudinal length of the slope required for construction on site is W.

[0072] The above data is used for subsequent plan formulation. In order to facilitate calculation, the cross-section of the slope at the excavation site is regarded as a right triangle.

[0073] A2. According to the survey data, set the excavation plan and backfill plan, and clean up the excavation site and backfill site at the same time;

[0074] The excavation plan includes the following steps:

[0075] B1. When the safety factor at the slope excavation site is 1, calculate the slope inclination angle after excavation at the slope excavation site, denoted as α max ;

[0076] B2. When the safety factor at the slope excavation site is 1, calculate the cross section of the slope after the slope is excavated on site, denoted as M;

[0077] B3. Based on the required volume of soil and rock for backfilling at the site, calculate the longitudinal length of the slope required for construction when excavating V volume of soil and rock for the slope.

[0078] Among them, the safety factor of the slope excavation site is calculated according to the Swedish strip method. When the safety factor is greater than 1, the slope is stable. When the safety factor is equal to 1, the slope is in a limit equilibrium state. When the safety factor is less than 1, the slope is destroyed.

[0079] In order to maintain the support effect after excavation, the height H of the slope before and after excavation is 初 remains unchanged, the calculation meaning of is that, under the limit equilibrium state, α max The maximum inclination angle of the slope after excavation. The greater the inclination angle of the slope after excavation, the steeper the slope. In order to prevent landslides, the maximum inclination angle of the slope after excavation is α max .

[0080] Among them, before the slope is excavated, H 初 and L 初 The functional relationship is L 初 tanα=H 初 .

[0081] The steps for calculating the slope safety factor at the slope excavation site include:

[0082] D1. Divide the slope of the excavation site into n vertical strips of width b;

[0083] D2, set the arc sliding surface;

[0084] D3. Calculate the deadweight G, sliding force T, anti-sliding force S and safety factor F of the vertical soil strip s .

[0085] This allows the calculation of the slope's safety factor using the Swedish strip method.

[0086] The vertical soil strips are numbered i;

[0087] The calculation method of the deadweight G of the vertical soil strip is:

[0088] G i =γbhi ,h i is the height of the i-th soil strip;

[0089] The calculation method of the sliding force T under the vertical soil strip is:

[0090] T i =G i sinα;

[0091] The calculation method of the vertical soil strip anti-sliding force T is:

[0092] S i =(c+G i cosαtanφ)Δl i , where Δl i is the length of the bottom surface of the i-th soil strip;

[0093] Slope safety factor F s The calculation method is:

[0094]

[0095] Thus, the safety factor of the slope is calculated and compared. The calculation method of the safety factor is also applicable to the real-time monitoring of the stability of the slope at the excavation site in step A4 after the subsequent excavation is completed.

[0096] When the safety factor at the slope excavation site is 1, calculate α max The method is:

[0097] Let n = 1, then b = L 初 ,at this time, n = 1 means that the slope is regarded as a vertical soil strip and the slope is regarded as a whole.

[0098] Let F s =1, then Gsinα max =(c+Gcosα max tanφ)Δl, inversely derive α max , using inverse trigonometric functions to derive α max The value of the slope is obtained, thereby obtaining the slope inclination angle when the slope is in the limit equilibrium state after excavation.

[0099] During the excavation process, it is necessary to monitor the average inclination angle of the slope in real time to prevent landslides during excavation and ensure the safety of the excavation site construction as much as possible.

[0100] The length of the bottom surface after excavation on site of slope excavation is L1;

[0101]

[0102] Among them, M is calculated as follows:

[0103] This calculation method is to regard the slope cross section after slope excavation as a right triangle, so M is calculated according to the triangle area calculation formula.

[0104] Where M represents the cross-sectional area of ​​the slope under the limit equilibrium state.

[0105] In F s =1, the calculation method of W is:

[0106] Where W is the length required to excavate V volume of soil and rock from the slope under the limit equilibrium state.

[0107] When the required soil and rock volume V is fixed, the larger W is, the smaller M is. Since H is initially fixed, the larger W is, the smaller the slope angle after excavation is. By adjusting the value of W, the slope angle after excavation and α can be adjusted. max The difference between .

[0108] Before excavation, adjust the W value to keep the slope angle after excavation lower than α max , thereby maintaining the stability of the slope after excavation. At the same time, in order to save construction costs, the larger the W value is, the better. Therefore, it is necessary to adjust the construction length according to the working cost of the excavation equipment. Therefore, by calculating the W value, not only can the stability of the slope after excavation be estimated and regulated, but it can also be used as one of the required variables for construction cost control (how to control construction costs requires consideration from multiple angles such as the power of the excavation equipment and labor costs. It is a common technical means for engineering construction costs in the prior art, so I will not go into too much detail here).

[0109] A3. Excavate soil and rocks at the excavation site according to the excavation plan, transport the soil and rocks to the backfill site through transfer equipment, and backfill the soil and rocks at the backfill site; thus completing the preliminary excavation and backfilling operations.

[0110] A4. Use compaction equipment to compact soil and rock at the backfill site, monitor the stability of the slope at the excavation site, and set up a maintenance plan. After the excavated soil and rock are filled into the backfill site, they need to be compacted by compaction equipment. There is a difference in the volume of soil and rock before and after compaction, so this part of the difference needs to be taken into account when calculating the required volume of soil and rock to maintain the accuracy of the project construction.

[0111] The backfilling scheme comprises the following steps:

[0112] C1. According to the soil density at the backfill site and the density of the excavated soil and rock, the compaction coefficient K is calculated. The minimum value of the compaction coefficient K is K min =Soil density at backfill site / density of excavated soil and rock, the compaction coefficient K minIt means that the excavated soil and rock will be compacted to the same density as the soil and rock at the backfill site. The compaction coefficient can be adjusted according to actual construction needs.

[0113] C2. Use the Qianxun CORS measurement system to survey the volume V of the backfill foundation pit on site 容 , and establish V 容 The functional relationship between V 容 The functional relationship of V is:

[0114] V=KV 容 , substitute this part of V into step B3, so as to provide data support for the calculation of W;

[0115] C3. After backfilling, the actual density of the soil and rock at the backfilling site is tested and recorded in a report to provide parameters for subsequent reference.

[0116] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0117] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0118] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fast calculation method for slope earthwork excavation and backfilling based on the CORS measurement system, characterized by: The following steps are involved: A1. Use the Qianxun CORS measurement system to survey the topographic data of the backfill site and collect and survey the physical properties of the soil in the slope area of ​​the excavation site; A2. According to the survey data, set the excavation plan and backfill plan, and clean up the excavation site and backfill site at the same time; A3. Excavate soil and rocks at the excavation site according to the excavation plan, transport the soil and rocks to the backfill site through the transfer equipment, and backfill the soil and rocks at the backfill site; A4. Use compaction equipment to compact soil and rock at the backfill site, monitor the stability of the slope at the excavation site, and set up a maintenance plan.

2. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 1 is characterized in that: The physical properties of the soil collected and surveyed include: The natural density of the slope soil at the excavation site is denoted as γ; The cohesion of the slope soil at the excavation site is denoted as c; The internal friction angle of the slope soil at the excavation site is denoted as φ; The surveyed terrain data includes: The volume of earth and rock excavated is denoted as V; The height of the slope at the excavation site is denoted as H 初 ; The length of the bottom surface of the slope at the excavation site, denoted as L 初 ; The angle between the slope of the excavation site and the horizontal plane is denoted as α; Among them, when the slope excavation volume V is earth and rock, the longitudinal length of the slope required for construction on site is W.

3. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 2 is characterized in that: The excavation scheme comprises the following steps: B1. When the safety factor at the slope excavation site is 1, calculate the slope inclination angle after excavation at the slope excavation site, denoted as α max ; B2. When the safety factor at the slope excavation site is 1, calculate the cross section of the slope after the slope is excavated on site, denoted as M; B3. Based on the required volume of soil and rock for backfilling at the site, calculate the longitudinal length of the slope required for construction when excavating V volume of soil and rock for the slope.

4. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 3 is characterized in that: The steps for calculating the slope safety factor at the slope excavation site include: D1. Divide the slope of the excavation site into n vertical strips of width b; D2, set the arc sliding surface; D3. Calculate the deadweight G, sliding force T, anti-sliding force S and safety factor F of the vertical soil strip s .

5. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 4 is characterized in that: The vertical soil strips are numbered i; The calculation method of the deadweight G of the vertical soil strip is: G i =γbh i ,h i is the height of the i-th soil strip; The calculation method of the sliding force T under the vertical soil strip is: T i =G i sinα; The calculation method of the vertical soil strip anti-sliding force T is: S i =(c+G i cosαtanφ)Δl i , where Δl i is the length of the bottom surface of the i-th soil strip; Slope safety factor F s The calculation method is: When the safety factor at the slope excavation site is 1, calculate α max The method is: Let n = 1, then b = L 初 ,at this time, Let F s =1, then Gsinα max =(c+Gcosα max tanφ)Δl, inversely derive α max .

6. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 5 is characterized in that: The length of the bottom surface after excavation on the slope excavation site is L1; Among them, M is calculated as follows:

7. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 6 is characterized in that: In F s =1, W is calculated as:

8. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 7 is characterized in that: The backfilling scheme comprises the following steps: C1. Calculate the compaction coefficient K based on the soil density at the backfill site and the density of the excavated soil and rock; C2. Use the Qianxun CORS measurement system to survey the volume V of the backfill foundation pit on site 容 , and establish V 容 The functional relationship between V and C3. After backfilling, test the actual density of soil and rock at the backfilling site and record it in the report.

9. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 8 is characterized in that: Minimum value of compaction coefficient K min =Soil density at backfill site / density of excavated soil and rock.

10. The rapid calculation method for slope earthwork excavation and backfilling based on the CORS measurement system according to claim 9 is characterized in that: V 容 The functional relationship of V is: V=KV 容 。

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