Steel structure engineering cost management method based on Internet of Things

Abstract

The invention belongs to the related field of civil engineering intelligent construction, and discloses a steel structure engineering cost management method based on the Internet of Things, and the method comprises the steps: achieving the real-time monitoring of component information and engineering progress through a BIM model and a radio frequency identification (RFID) technology; calculating predicted values of material cost and construction cost through dynamic data, and further calculating real-time final cost; the cost performance index is calculated through the final cost data, and a decision basis is provided for management personnel. The Internet of Things technology is integrated into steel structure engineering cost management, visual data of all links can be provided, the steel structure engineering cost management control capability is remarkably improved, and it is ensured that the project cost and the budget baseline are kept consistent.

Description

Technical Field

[0001] The invention belongs to the field of intelligent construction of civil engineering and relates to a steel structure engineering cost management method based on the Internet of Things. Background Art

[0002] During the construction process, cost management is the core link for project success; the purpose is that through reasonable planning and dynamic monitoring, cost management can effectively control the budget, optimize resource allocation, and avoid waste and overspending; at the same time, it helps to discover potential problems, formulate response strategies, reduce economic risks, and improve construction efficiency and quality; good cost management can also enhance project benefits, meet the expectations of owners, and establish long-term competitiveness for the enterprise; in the face of a complex and changing construction environment, scientific cost management is a strong guarantee for achieving the unity of economic benefits and engineering goals.

[0003] However, the process of cost management is time-consuming and complicated. How to manage costs while ensuring the quality of project construction has always been the focus and difficulty of project cost management. Most of the cost management methods in the project are to formulate corresponding standards and requirements before construction, and real-time cost management methods during the construction process are still relatively scarce. In addition, although the Internet of Things technology has begun to be initially applied in steel structure projects, there is still a lack of methods for project cost management based on the Internet of Things technology. Summary of the invention

[0004] The purpose of the present invention is to provide a method for cost management of steel structure projects based on the Internet of Things for cost management in the process of steel structure construction.

[0005] The present invention is achieved through the following technical solutions:

[0006] Establish a steel structure BIM sub-model including component type, size, material, location and number;

[0007] Upload the BIM sub-model to the collaboration platform;

[0008] Integrate each BIM sub-model to form a BIM overall model;

[0009] Form a detailed processing drawing of steel components based on the BIM overall model after the collision check;

[0010] Find key steel components based on cost management objectives;

[0011] Implanting chips and QR codes on key components in steel structure processing plants;

[0012] Update steel component information through radio frequency identification (RFID) technology and QR codes;

[0013] Use RSA algorithm to encrypt it;

[0014] Based on the real-time data provided by the interactive platform, the expected total cost of the project is calculated according to formula (1):

[0015] K t =K m +K c +K d +K i +K c (1)

[0016] (1) In the formula, K t is the expected total cost; K m is the material cost; K c is the construction cost; K d K is the design fee; i is the indirect cost; K c For emergency expenses;

[0017] (1) Where:

[0018]

[0019] (2) In the formula, Q i is the quantity of the i-th type of steel (unit: tons); P i is the unit price of the i-th type of steel (unit: yuan / ton); F si is the transportation cost ratio of the i-th type of steel; n is the number of steel types; α si is the loss rate of the i-th type of steel calculated through the IoT system;

[0020] (2) Where:

[0021]

[0022] (3) where n is the number of steel types; h is the step length (the interval between two adjacent time points); r i (t0) is the loss rate of the i-th steel at the initial node; It is the sum of the loss rates at odd positions (points 1, 3, 5...); is the sum of the loss rates of even-numbered positions (points 2, 4, 6, etc.); r i (tn) is the i-th steel at time t n The loss rate of S n is the budget consumption;

[0023] (1) Where:

[0024]

[0025] (4) In the formula, L j The number of workers working on the jth construction item; W jThe unit price of workers for the jth construction job; pj is the deviation coefficient between the progress of the j-th construction work calculated by the IoT system and the expected progress; R j The number of mechanical equipment required for the jth construction work; T j Rental costs of machinery and equipment required for the jth construction work; K j For other construction-related expenses;

[0026] (1) Where:

[0027] K d =D s +D c +D e (5)

[0028] (5) In the formula, D s Initial design cost; D c Consulting service fee; e Engineering technical support costs;

[0029] Calculate the cost performance index:

[0030]

[0031] (6) In the formula, EAC is the expected total cost which can be approximately equal to the final cost estimated in real time; BAC is the budgeted total cost; CPI is the cost performance index;

[0032] Take actions based on cost performance index;

[0033] Beneficial effects of the present invention: In view of the problem that costs cannot be managed in a timely manner during steel structure construction, the present invention proposes a method for calculating expected costs that change with the construction progress; the method combines the changes in costs during steel structure construction with Internet of Things technology, providing a theoretical basis for real-time monitoring and prediction of cost fluctuations in steel structure projects; this method not only provides a scientific and effective calculation framework for solving the problem of expected costs that change with progress in steel structure projects, but also helps ensure cost stability and improves the ability to adjust costs during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic flow diagram of the method of the present invention;

[0035] Figure 2 It is a schematic diagram of the BIM collaboration platform in the present invention;

[0036] Figure 3 It is the workflow diagram of RFID technology in the present invention; DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments.

[0038] Example

[0039] A steel structure engineering cost management method based on the Internet of Things is characterized in that three kinds of steel are used in a certain project; 200 tons of steel 1 are required, the unit price is 4,000 yuan / ton, and the transportation cost ratio is 0.1; 150 tons of steel 2 are required, the unit price is 5,000 yuan / ton, and the transportation cost ratio is 0.08; 100 tons of steel 3 are required, the unit price is 6,000 yuan / ton, and the transportation cost ratio is 0.12; the estimated steel loss rate is 5%; the number of workers required for the first construction work is 20, and the unit price per person is 300 yuan / ton.

[0040] days, the number of mechanical equipment is 5, the equipment rental fee is 5,000 yuan / month, and other construction costs are 10,000 yuan; the number of workers required for the second construction work is 15, the unit price of each person is 350 yuan / day, the number of mechanical equipment is 3, the equipment rental fee is 6,000 yuan / month, and other construction costs are 15,000 yuan; the design fee is 110,000 yuan; the indirect cost is 50,000 yuan; the emergency cost is 20,000 yuan.

[0041] A steel structure engineering cost management method based on the Internet of Things comprises the following steps:

[0042] Step 1: Establish a steel structure BIM sub-model including component type, size, material, location and number;

[0043] Step 2: Upload the BIM sub-model to the collaboration platform;

[0044] Step 3: Integrate each BIM sub-model to form a BIM overall model;

[0045] Step 4: Form a detailed processing drawing of steel components based on the BIM overall model after the collision check;

[0046] Step 5: Find key steel components based on cost management objectives;

[0047] Step 6: Implant the key components with chips and QR codes at the steel structure processing plant;

[0048] Step 7: Update steel component information through radio frequency identification (RFID) technology and QR code;

[0049] Step 8: Use RSA algorithm to encrypt it;

[0050] Step 9: Based on the real-time data provided by the interactive platform, calculate the expected total cost of the project according to formula (1):

[0051] According to the calculation of the Internet of Things system, the loss rate of steel 1 is 5%, the loss rate of steel is 4%, and the loss rate of steel 3 is 6%; the construction progress deviation coefficient of the first construction work is 10%, and the construction progress deviation coefficient of the second construction work is 5%;

[0052] K t =K m +K c +K d +K i +K c (1)

[0053] The actual material cost is:

[0054] K m =K m1 +K m2 +K m3 =924,000+846,000+711,360=2,487,360 yuan

[0055] The actual construction cost is:

[0056] K c =K c1 +K c2 =44100+39517.5=83617.5 yuan

[0057] The final cost estimated in real time is:

[0058] K t =K m +K c +K d +K i +K c =2487360+83617.5+110000+50000+20000=2710577.5 yuan

[0059] Step 10: Calculate the cost performance index:

[0060]

[0061] Step 11: If the CPI is less than 1, it means that the project is at risk of cost overruns and measures need to be taken to improve cost control;

[0062] Although the specific calculation method of the present invention is described above in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that various modifications or variations that can be made by technical personnel in this field on the basis of the design scheme of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A steel structure engineering cost management method based on the Internet of Things, characterized in that: include: The first step is to establish a steel structure BIM sub-model including component type, size, material, location and number; The second step is to upload the BIM sub-model to the collaborative platform; The third step is to integrate the BIM sub-models to form the BIM overall model; The fourth step is to form a detailed processing drawing of the steel components based on the BIM overall model after the collision check; Step 5: Find key steel components based on cost management goals; Step 6: implant the key components with chips and QR codes at the steel structure processing plant; Step 7: Update steel component information through radio frequency identification (RFID) technology and QR code; Step 8: Use RSA algorithm to encrypt it; Step 9: Calculate the expected total cost of the project according to formula (1) based on the real-time data provided by the interactive platform: K t =K m +K c +K d +K i +K c (1) (1) In the formula, K t is the expected total cost; K m is the material cost; K c is the construction cost; K d K is the design fee; i is the indirect cost; K c For emergency expenses; (1) Where: (2) In the formula, Q i is the quantity of the i-th type of steel (unit: tons); P i is the unit price of the i-th type of steel (unit: yuan / ton); F si is the transportation cost ratio of the i-th type of steel; n is the number of steel types; α si is the loss rate of the i-th type of steel calculated through the IoT system; (2) Where: (3) where n is the number of steel types; h is the step length (the interval between adjacent times); r i (t0) is the loss rate of the i-th steel at the initial node; It is the sum of the loss rates at odd positions (points 1, 3, 5...); is the sum of the loss rates of even-numbered positions (points 2, 4, 6, etc.); r i (t n ) is the i-th steel at time t n The loss rate of S n is the budget consumption; (1) Where: (4) In the formula, L j The number of workers working on the jth construction item; W j The unit price of workers for the jth construction work; β pj is the deviation coefficient between the progress of the j-th construction work calculated by the IoT system and the expected progress; R j The number of mechanical equipment required for the jth construction work; T j Rental costs of machinery and equipment required for the jth construction work; K j For other construction-related expenses; (1) Where: K d =D s +D c +D e (5) (5) In the formula, D s Initial design cost; D c Consulting service fee; e Engineering technical support costs; Step 10: Calculate the cost performance index: (6) In the formula, EAC is the estimated total cost to complete, which can be approximately equal to the expected total cost; BAC is the budgeted total cost; CPI is the cost performance index; Step 11. Take measures based on the cost performance index.

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