A method and device for configuring a precast beam yard beam platform and form

Abstract

The application provides a configuration method and device for a beam manufacturing pedestal and a formwork of a precast beam field. The method comprises the following steps: determining the number of beam manufacturing pedestals based on the beam manufacturing time in a construction period plan and the size of the precast beam field; calculating the average number of beams manufactured per day according to the number of beam manufacturing pedestals, dividing the beam manufacturing process into multiple beam manufacturing periods based on the quantity ratio of various types of precast beams, and determining the type and quantity of beams manufactured in one beam manufacturing period; determining the type and quantity of formworks in one beam manufacturing period based on the principle that the same type of formwork is used for precast beams with the same shape and size, and determining the precast beams produced per day and the formworks used. The application can solve the problem that the overall beam manufacturing period is prolonged due to the imbalance of beam type proportion in the construction process, the beam manufacturing progress of certain precast beam types is ahead of schedule, the beam manufacturing progress of other precast beam types is behind schedule, the precast beam delivery and erection progress is affected, and the overall beam manufacturing period is prolonged by dividing the beam manufacturing process into multiple beam manufacturing periods based on the quantity ratio of various types of precast beams.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge construction, and particularly relates to a configuration method and device of a precast beam platform and a formwork in a precast beam yard. BACKGROUND

[0002] In bridge engineering, the use of precast beams is particularly important, which can improve the overall quality of bridge engineering. The precast beam has the advantages of high construction standardization degree, easy quality and construction period control, etc. The precast beam is generally centrally precast in a fixed precast beam yard, and is connected into a whole through the transverse partition plate cast-in-place section and the driving lane plate wet joint between adjacent precast beams. The planning and configuration of the precast beam yard are important components of construction organization. At present, the configuration of the precast beam platform and the formwork in the precast beam yard can only be estimated by experience, and there is a problem that the imbalance of the beam type ratio causes the precast beam type to be ahead of schedule, the precast beam type to be behind schedule, the precast beam to be out of the yard and the erection progress to be affected, thereby causing the overall precast beam construction period to be prolonged. SUMMARY

[0003] In order to solve the above problems in the prior art, the application provides a configuration method and device of a precast beam platform and a formwork in a precast beam yard.

[0004] In order to achieve the above purpose, the application adopts the following technical scheme.

[0005] In a first aspect, the application provides a configuration method of a precast beam platform and a formwork in a precast beam yard, comprising the following steps:

[0006] determining the number of the precast beam platforms based on the precast beam time in the construction period plan and the size of the precast beam yard;

[0007] calculating the average number of precast beams per day according to the number of the precast beam platforms, dividing the precast beam process into multiple precast beam periods based on the number ratio of various types of precast beams, and determining the type and number of precast beams in a precast beam period;

[0008] determining the type and number of the formworks in a precast beam period based on the principle that the same type of formwork is used for the same shape and size of precast beam, and determining the precast beams produced per day and the formworks used.

[0009] Further, the method for determining the number N of the precast beam platforms comprises:

[0010] S1, calculating the minimum required number of the precast beam platforms based on the construction period requirement, and the formula is as follows:

[0011]

[0012] In the formula, N a is the minimum required number of the precast beam platforms; represents the upward rounding operation; M is the total number of precast beams; θ is the time needed to produce a precast beam, in days; T is the beam production time in the project plan, in days; α is a surplus coefficient, α>1;

[0013] S2, determine the maximum number N of beam production stands that can be accommodated in the precast beam field according to the size of the precast beam field and the length and spacing of the beam production stands b ;

[0014] S3, if N a ≤N b , turn to S4; otherwise, the size of the precast beam field does not meet the project requirement, increase the beam production time to decrease N a by adjusting the project plan, and / or increase N b by increasing the area of the precast beam field, so that N a ≤N b ;

[0015] S4, take N a as the number of beam production stands, i.e. N=N a .

[0016] Further, when the precast beam field is arranged with J beam production stands per row or per column, find an integer j that satisfies the inequality N a <j×J≤N b , and correct the number of beam production stands to N=j×J.

[0017] Further, the formula for calculating the average number of beams produced per day is:

[0018]

[0019] where k is the average number of beams produced per day, represents the downward rounding operation.

[0020] Further, the method for determining the number of beams produced in a beam production period comprises:

[0021] calculating the simplest integer ratio of the number of each type of precast beam, and calculating the sum m of each item of the simplest integer ratio;

[0022] calculating the least common multiple M1=[k,m] of k and m, and M1 is the number of beams produced in a beam production period.

[0023] Further, the precast beams produced and the templates used per day in a beam production period are determined according to the following three conditions:

[0024] Condition 1: the average number of beams produced per day in each beam production period is k;

[0025] Condition 2: the number of each type of precast beam in each beam production period is the same;

[0026] Condition 3: the number of the same type of formwork used in each beam production cycle is minimum, and the sum of the number of each type of formwork is minimum.

[0027] Further, the configuration of the precast beams and the formworks in one beam production cycle is as follows: the precast beams include one high-side beam, two middle beams and one low-side beam; the formworks include 0.5 sets of high-side side of high-side beam, 2×0.5 sets of high-side side of middle beam, 2×0.5 sets of low-side side of middle beam, 0.5 sets of low-side side of low-side beam, and 0.5 sets of high-side side of high-side beam combined with 0.5 sets of low-side side of low-side beam as one set for one precast beam.

[0028] Further, the method further comprises: if the number N of beam production benches determined in step S4 is less than N b , adjusting the number of beam production benches by the following method:

[0029] Supposing the number of precast beams in one beam production cycle is M1=n×m, wherein n is a positive integer, and m is the sum of the simplest integer ratio of the number of each type of precast beam;

[0030] According to conditions 2 and 3, the configuration of precast beams in one beam production cycle per day is listed for different n, and the average number of precast beams per day k is calculated for each configuration, and the number of precast beams produced per day is an integer not more than N b / θ;

[0031] The maximum k max of k is calculated, and the number of beam production benches N' capable of fully utilizing the formworks is calculated according to the following formula:

[0032]

[0033] The number of beam production benches is adjusted to min(N', N b ).

[0034] Further, the method further comprises: based on the matching degree of the beam production speed and the beam erection speed, optimizing the configuration scheme of the beam production benches and the formworks with the optimization target of the minimum total cost of beam production and beam erection.

[0035] In the second aspect, the application provides a configuration device for beam production benches and formworks in a precast beam field, comprising:

[0036] A first configuration module is configured to determine the number of beam production benches based on the beam production time in the construction period plan and the size of the precast beam field;

[0037] A second configuration module is configured to calculate the average number of precast beams per day according to the number of beam production benches, divide the beam production process into multiple beam production cycles based on the number ratio of each type of precast beam, and determine the type and number of precast beams in one beam production cycle.

[0038] The third configuration module is configured to determine the type and quantity of the formwork in a beam production period based on the principle that the same type of formwork is used for the prefabricated beams with the same shape and size, and to determine the prefabricated beams produced per day and the formwork used.

[0039] Compared with the prior art, the present application has the following beneficial effects.

[0040] The present application determines the number of beam production seats based on the beam production time in the construction period plan and the size of the prefabricated beam site, calculates the average daily beam production quantity according to the number of beam production seats, divides the beam production process into multiple beam production periods based on the quantity ratio of various prefabricated beams, determines the type and quantity of beam production in a beam production period, determines the type and quantity of formwork in a beam production period based on the principle that the same type of formwork is used for the prefabricated beams with the same shape and size, and determines the prefabricated beams produced per day and the formwork used, thereby realizing the automatic configuration of the beam production seats and formwork in the prefabricated beam site. The present application divides the beam production process into multiple beam production periods based on the quantity ratio of various prefabricated beams, and can solve the problem that the beam production progress of certain prefabricated beam types is ahead of schedule and the beam production progress of other prefabricated beam types is behind schedule due to the imbalance of beam type proportion in the construction process, thereby affecting the prefabricated beam site and erection progress and leading to the overall extension of the beam production period. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 The flowchart of the configuration method of the beam production seats and formwork in the prefabricated beam site according to the embodiment of the present application.

[0042] Figure 2 The schematic diagram of various prefabricated beams in the cross section of the bridge span

[0043] Figure 3 The block diagram of the configuration device of the beam production seats and formwork in the prefabricated beam site according to the embodiment of the present application. DETAILED DESCRIPTION

[0044] To make the purpose, technical scheme and advantages of the present application clearer and more apparent, the present application is further described below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0045] Figure 1 The flowchart of the configuration method of the beam production seats and formwork in the prefabricated beam site according to the embodiment of the present application includes the following steps:

[0046] Step 101, determining the number of beam production seats based on the beam production time in the construction period plan and the size of the prefabricated beam site;

[0047] Step 102, calculate the average daily beam production quantity according to the number of beam production benches, divide the beam production process into multiple beam production periods based on the quantity ratio of various types of precast beams, determine the type and quantity of beams produced in a beam production period;

[0048] Step 103, based on the principle that the same type of formwork is used for precast beams of the same shape and size, determine the type and quantity of formwork in a beam production period, and determine the precast beams produced and the formwork used each day.

[0049] In this embodiment, step 101 is mainly used for beam bench configuration. The beam bench is generally a fixed bench, which serves as the bottom mold and working platform for precast beam construction. The formwork, pouring, curing, tensioning, grouting, and anchoring of the precast beam are all completed on the beam bench. The precast beam can be removed from the beam bench only after grouting and anchoring are completed. The single-piece precast beam construction occupies the beam bench for a period equal to a beam production period. In order to improve the beam production speed, multiple beam benches can be configured to produce beams simultaneously. The higher the beam production speed required by the construction progress, or the shorter the beam production time in the construction schedule, the more beam benches need to be configured. Conversely, the same is true. Therefore, the demand for beam benches is inversely proportional to the beam production time in the construction schedule, and is of course proportional to the total number of precast beams and the production period of a single-piece precast beam. Since this embodiment is for beam production in a precast beam yard, the maximum number of beam benches is also limited by the size of the site. For example, the larger the site area, the more beam benches can be configured. That is, this embodiment takes into account both the construction period and the site size.

[0050] In this embodiment, step 102 is mainly used to divide the beam production process into multiple beam production periods. The duration, beam type and quantity, and formwork type and quantity of each beam production period are the same. Therefore, the average daily beam production quantity and the quantity ratio of various types of precast beams in each beam production period are also the same. This embodiment first calculates the average daily beam production quantity according to the number of beam production benches, and then determines the type and quantity of precast beams in a beam production period according to the average daily beam production quantity and the quantity ratio of various types of precast beams. The following embodiments will give a technical solution for determining the quantity of precast beams in a beam production period.

[0051] In the embodiment, step 103 is mainly used for arranging the prefabricated beam and the formwork. The formwork is used as a side mold of the prefabricated beam, generally adopts a fixed steel formwork, is erected on a beam forming platform, and is removed after the prefabricated beam is poured and reaches a certain strength. Compared with a general beam forming platform, the formwork is related to the appearance size of the prefabricated beam, different formworks are used for construction of prefabricated beams with different appearance sizes to ensure that the appearance size of the prefabricated beam is accurate, and the formwork is used between the beam forming platforms. In the embodiment, based on the principle that the same type of formwork is used for the prefabricated beams with the same shape and size, the type and quantity of the formwork used in a beam forming period are determined. Of course, a "schedule" in a beam forming period is also arranged, that is, the type and quantity of the prefabricated beam produced each day in a beam forming period and the type and quantity of the formwork used are determined.

[0052] As an optional embodiment, the method for determining the number N of beam forming platforms comprises the following steps.

[0053] S1, calculating the minimum required number N of beam forming platforms based on the construction period requirement, and the formula is as follows:

[0054]

[0055] In the formula, N a is the minimum required number of beam forming platforms; represents a rounding up operation; M is the total number of prefabricated beams; θ is the time required for producing a prefabricated beam, in days; T is the beam forming time in the construction period plan, in days; α is a surplus coefficient, and α>1;

[0056] S2, determining the maximum number N of beam forming platforms that can be accommodated by the prefabricated beam field according to the size of the prefabricated beam field and the length and spacing of the beam forming platforms b .

[0057] S3, if N a ≤N b , turn to S4; otherwise, the size of the prefabricated beam field does not meet the construction period requirement, the beam forming time in the construction period plan is increased to reduce N a , and / or the area of the prefabricated beam field is increased to increase N b , so that N a ≤N b .

[0058] S4, taking N a as the number of beam forming platforms, that is, N=N a .

[0059] The embodiment provides a technical solution for determining the number of beam forming platforms, comprising steps S1-S4.

[0060] Step S1 is mainly used for calculating the minimum required number N aThe demand of beam bench is inversely proportional to the beam making time T in the construction schedule, and is proportional to the total number of precast beams M and the beam making period θ of a single precast beam. Accordingly, the minimum demand of beam bench can be obtained by the formula (1). The α in the formula (1) is a surplus factor, which is generally taken as 1.1-1.2.

[0061] A calculation example of N a is given below. Assuming that the total number of precast beams is 508, the beam making period of a single beam is 10 days, the surplus factor of beam bench is taken as 1.2, and the longest time for beam making according to the construction schedule is 334 days. By substituting M=508, θ=10, T=334 into the formula (1), N a =19 is obtained.

[0062] Step S2 is mainly used for determining the maximum number of beam benches N b that can be accommodated in the precast beam site. In this embodiment, the maximum number of beam benches that can be accommodated in the precast beam site is determined based on the size of the precast beam site and the length and spacing of the beam benches. The beam benches generally cannot be arranged throughout the precast beam site, and a beam storage area needs to be reserved. The size of the beam storage area can be estimated according to the number of precast beams that can be erected in 7-10 days of beam erection construction.

[0063] A calculation example of N b is given below. The precast beam site to be built has a length of 450 m and a width of 20 m. Considering the drainage on both sides of the site and the safety distance from the slope, the spacing of the gantry crane tracks in the precast beam site is taken as 18 m. The precast beam has a length of 30 m and a top width of 220 cm. Considering the need for form removal space, the net spacing of the precast beam is taken as 200 cm, and the centerline spacing of the beam bench is taken as 420 cm. The site width is 18 m, and three rows of beam benches and one beam transportation access road can be arranged. Considering the construction needs, the beam bench has a length of 31 m, and the longitudinal net spacing of the beam bench is 4 m, i.e., the length of the space occupied by each row of beam benches in the longitudinal direction is 35 m. The length of the steel bar processing shed is 30 m, the length of the beam storage area is 2 rows of beams with a spacing of 2 m, and the length of the space occupied is (30 m+2 m)×2=64 m. Therefore, the length of the roadbed available for arranging beam benches is 450 m-30 m-64 m=356 m, and the number of beam benches that can be arranged is 356 m / 35 m=10.2, which is rounded down to 10 rows. In summary, the maximum number of beam benches that can be arranged at the site location of the precast beam site is N b =3×10=30.

[0064] Step S3 determines whether to adjust N a according to the relative size of N b and N a . If N a ≤N b , the number of beam benches is configured as N=N a ; if N a >N b, indicating that the size of the precast beam field does not meet the time limit requirement, the beam manufacturing time in the time limit plan needs to be increased to reduce N a , so as to make N a ≤N b . Of course, N b may also be increased by increasing the number of precast beam fields or expanding the area of the precast beam field, so as to increase N a , so as to make N b ≤N a .

[0065] In the preceding example, since N b = 30, N a = 19, N b <N a , there is no need to adjust N a , and the number of beam manufacturing seats is directly set to 19.

[0066] As an optional embodiment, when the precast beam field is arranged with J field beam manufacturing seats per row or per column, an integer j satisfying the inequality N b is found, and the number of beam manufacturing seats is corrected to N = j x J.

[0067] This embodiment gives a technical solution for optimizing the number of beam manufacturing seats. This embodiment is for a relatively standard precast beam field, and the precast beam field is arranged with the same number of field beam manufacturing seats per row or per column, that is, in a matrix shape. If the determined number of beam manufacturing seats N cannot be arranged in an integer row or column, N is increased to fill the vacancy. Of course, the corrected N should not exceed N b . This embodiment finds an integer j by solving the inequality N a < j x J ≤ N b , and corrects N to j x J. It is worth noting that j can have multiple values, that is, the current row or column can be filled, or an integer row or column can be added, but generally the minimum value is taken, that is, only the current row or column is filled.

[0068] The following gives an example of optimizing N. The precast beam field is arranged with 3 field beam manufacturing seats per row, that is, J = 3, and the inequality 19 < 3 x j ≤ 30 is solved to obtain j = 7, 8, 9, 10. In theory, N can be corrected to 3 x j = 21, 24, 27, 30, but in practice, N = 21 is generally taken.

[0069] As an optional embodiment, the formula for calculating the average number of beams per day is:

[0070]

[0071] In the formula, k is the average number of beams per day, , which represents the floor operation.

[0072] The embodiment provides a technical scheme for calculating the average number of beams per day. 1 / θ is the average number of beams per day when there is only one beam production seat, and therefore the average number of beams per day when there are N beam production seats can be expressed as formula (2).

[0073] In the preceding example, N=21 and θ=10 are substituted into formula (2) to obtain the average number of beams per day k=2.

[0074] As an optional embodiment, the method for determining the number of beams in a beam production cycle comprises the following steps.

[0075] calculating the simplest integer ratio of the number of each type of prefabricated beam, and calculating the sum m of each item of the simplest integer ratio;

[0076] calculating the least common multiple M1=[k,m] of k and m, and M1 is the number of beams in a beam production cycle.

[0077] The embodiment provides a technical scheme for determining the number of beams in a beam production cycle. The embodiment is based on the fact that the ratio of the number of each type of prefabricated beam in a beam production cycle is a certain ratio, and the average number of beams per day is k, and the number of beams in a beam production cycle M1 is calculated. First, the ratio of the number of each type of prefabricated beam is simplified to the simplest integer ratio, and then the sum of each item of the simplest integer ratio is calculated and denoted as m. According to the above analysis, the number of beams in a beam production cycle should be a common multiple of k and m, and the embodiment takes the least cycle, that is, the least common multiple M1=[k,m] of k and m.

[0078] The following is a calculation example. It is assumed that the ratio of the number of each type of prefabricated beam in a beam production cycle is 1:2:1, the simplest integer ratio is also 1:2:1, the sum m of each item of the simplest integer ratio is 1+2+1=4, and the average number of beams per day is still k=2. Then the number of beams in a beam production cycle M1=[2,4]=4.

[0079] As an optional embodiment, the prefabricated beams produced and the templates used in a beam production cycle are determined according to the following three conditions.

[0080] Condition 1: the average number of beams per day in each beam production cycle is k;

[0081] Condition 2: the number ratio of each type of prefabricated beam in each beam production cycle is the same;

[0082] Condition 3: the number of the same type of template used in each beam production cycle is the minimum, and the sum of the number of each type of template is the minimum.

[0083] The embodiment gives three conditions that the beam production schedule in a beam production period must satisfy. The beam production schedule is the type and quantity of the precast beams produced each day in a beam production period, and the type and quantity of the formworks used. The first two conditions are for the precast beams: the first condition is that the average daily beam production quantity is k; the second condition is that the quantity ratio of each type of precast beam is a certain ratio, that is, the quantity ratio of each type of precast beam in each beam production period is the same. The last condition is for the formworks used by the precast beams, which requires that the number of the same formworks used at the same time is the minimum, and the sum of the number of each type of formwork is the minimum.

[0084] As an optional embodiment, the precast beams and formworks in a beam production period are configured as follows: the precast beams include one high-side beam, two middle beams, and one low-side beam; the formworks include 0.5 set of high-side side of high-side beam, 2×0.5 set of high-side side of middle beam, 2×0.5 set of low-side side of middle beam, 0.5 set of low-side side of low-side beam, and 1 set of 0.5 set of high-side side of high-side beam and 0.5 set of low-side side of low-side beam, which are used for one precast beam.

[0085] The embodiment gives a specific configuration scheme of the precast beams and formworks in a beam production period. The bridge cross section of the embodiment is 4 precast T-shaped beams / cross, which includes three types of precast beams, i.e., high-side beam, middle beam, and low-side beam, and the quantity of each type is one high-side beam, two middle beams, and one low-side beam. The appearance shape and size of the low-side side of high-side beam and the low-side side of middle beam are the same, the appearance shape and size of the high-side side of low-side beam and the high-side side of middle beam are the same, and the appearance shape and size of the high-side side of high-side beam, the high-side side of middle beam, the low-side side of middle beam, and the low-side side of low-side beam are different. Therefore, the formworks used by the precast beams of the configuration include four types, i.e., high-side side formwork of high-side beam, high-side side formwork of middle beam, low-side side formwork of middle beam, and low-side side formwork of low-side beam. Half of the high-side side formwork of high-side beam and half of the low-side side formwork of low-side beam are combined into 1 set, which is used for one precast beam. Therefore, the quantity of each type of formwork is in units of 0.5 set, and the quantity of each type is 0.5 set of high-side side of high-side beam, 2×0.5 set of high-side side of middle beam, 2×0.5 set of low-side side of middle beam, and 0.5 set of low-side side of low-side beam.

[0086] As an optional embodiment, the method further includes: if the number N of beam production seats determined in step S4 is N b , adjusting the number of beam production seats by the following method:

[0087] Suppose the number of beams produced in a beam production period is M1=n×m, where n is a positive integer, and m is the sum of the simplest integer ratio of the quantity of each type of precast beam.

[0088] According to conditions 2 and 3, the precast beam configuration each day in a beam production period is listed for different n, and the average daily beam production quantity k is calculated for each configuration. The quantity of precast beams produced each day is an integer not greater than N b / θ.

[0089] The maximum k is calculated max and the number of beam benches N' that can make full use of the template is calculated according to the following formula:

[0090]

[0091] The number of beam benches is adjusted to min(N', N b ).

[0092] This embodiment gives another technical solution for optimizing the number of beam benches N. The optimization solution of this embodiment is only suitable for the case of N b determined by S4, N b = 30, so N b <N

[0093] First, given the number of beams M1 in a beam production period, M1 is an integer multiple of m, which is the sum of the simplest integer ratio of the number of each type of precast beam, and can be expressed as M1 = n x m.

[0094] Then, without limiting the average number of beams per day to According to conditions 2 and 3, the type and number of precast beams produced per day in a beam production period are listed for different n, and the average number of beams per day k is calculated for each configuration. The number of precast beams produced per day is an integer not exceeding N b / θ, and generally should not be less than M / T. There are very few values that can meet this condition, following the previous example, N b / θ = 30 / 10 = 3, M / T = 508 / 334 = 1.52, the number of prefabricated beams produced per day can only be 2, 3. Therefore, it can be easily listed the configuration satisfying the condition, for example, still taking m = 4, when n = 1, M1 = 1 x 4 = 4, the length of a beam production cycle t is 2, and the prefabricated beams produced in the first day are: one high-edge beam, one middle beam (the templates used are: 0.5 sets of high-edge side of high-edge beam, 0.5 sets of high-edge side of middle beam, 2 x 0.5 sets of low-edge side of middle beam, 0.5 sets of high-edge side of low-edge beam are idle); the prefabricated beams produced in the second day are: one low-edge beam, one middle beam (the templates used are: 0.5 sets of high-edge side of high-edge beam are idle, 2 x 0.5 sets of high-edge side of middle beam, 0.5 sets of low-edge side of middle beam are idle, 0.5 sets of high-edge side of low-edge beam are used). The average number of beams produced per day k = 2. When n = 2, M1 = 2 x 4 = 8, if the length of a beam production cycle t is still 2, the number of beams produced per day x is 4, which does not satisfy the inequality. Therefore, t = 3 is taken, and the number of beams produced per day is 3, 3, 2 respectively, the prefabricated beams produced in the first day and the second day are: one high-edge beam, one middle beam, one low-edge beam (the templates used are: 0.5 sets of high-edge side of high-edge beam, 2 x 0.5 sets of high-edge side of middle beam, 2 x 0.5 sets of low-edge side of middle beam, 0.5 sets of high-edge side of low-edge beam are idle); the prefabricated beams produced in the third day are: two middle beams (the templates used are: 0.5 sets of high-edge side of high-edge beam are idle, 2 x 0.5 sets of high-edge side of middle beam, 2 x 0.5 sets of low-edge side of middle beam, 0.5 sets of high-edge side of low-edge beam are idle). The average number of beams produced per day k = 8 / 3. Then the maximum value of k is k max = 8 / 3 (8 / 3 > 2).

[0095] Finally, the number of beam production benches N' that fully utilize the templates is calculated according to formula (3), and N' is used to replace N. Continuing the previous example,

[0096] It is worth noting that the above beam production sequence cannot be arbitrarily adjusted (such as interchanging the beam production sequence of the first day and the third day), because the beam erection is carried out in a fixed sequence, such as first erecting the first span, then erecting the second span, and so on, and the beam production sequence should be consistent with the beam erection sequence as much as possible. Arbitrary adjustment of the sequence may result in beams that need to be erected not being prefabricated, and prefabricated beams not being able to be erected, thereby delaying the construction progress.

[0097] As an optional embodiment, the method further comprises: based on the matching degree of the beam production speed and the beam erection speed, optimizing the configuration scheme of the beam production benches and the templates with the optimization target of minimizing the total cost of beam production and beam erection.

[0098] The embodiment gives a technical scheme for optimizing beam manufacturing bench and formwork configuration based on cost accounting. The embodiment judges whether the beam manufacturing speed and the beam erecting speed are consistent, takes corresponding improvement measures, and then optimizes the configuration scheme of the beam manufacturing bench and the formwork, so as to realize the goal of the lowest total cost of beam manufacturing and erecting. The specific method is as follows:

[0099] SS1, if the beam erecting speed is faster than the beam manufacturing speed, and the beam erecting equipment is seriously idle, then by comparing the cost ΔC1 of expanding the beam manufacturing area, increasing the formwork, beam manufacturing bench and team with the cost ΔC2 of the beam erecting equipment idle, it is judged whether the increase of the beam field investment is economic:

[0100] If ΔC1≤ΔC2, adjust the construction period plan, determine the beam manufacturing period according to the beam erecting speed, return to step SS1 to recalculate, expand the beam manufacturing area, increase the formwork, beam manufacturing bench and team, and improve the beam manufacturing speed;

[0101] If ΔC1>ΔC2, the number of beam manufacturing benches, the type and number of formworks, and the beam manufacturing sequence determined in the above calculation process remain unchanged, the beam storage area is expanded, and the beam erecting equipment is delayed to enter the site.

[0102] SS2, if the beam erecting speed is slower than the beam manufacturing speed, and the beam manufacturing is seriously idle, the following measures are taken according to whether the beam erecting equipment is increased:

[0103] Increase the beam erecting equipment to improve the beam erecting speed;

[0104] Adjust the construction period plan, advance the beam manufacturing start time, reduce the beam manufacturing area, expand the beam storage area, and return to step SS1 to recalculate the beam manufacturing bench and formwork configuration.

[0105] A specific example is given below. Assume that the maximum girder erection speed is 1 span / day, there are 127 spans in total, divided into 14 bridge sections, the bridge erecting machine turns the field 1 time after each bridge section is completed, and it takes 3 days / time to turn the field; the weight of the 30m prefabricated T-beam formwork is 28.7 tons / set, the formwork unit price is 6800 yuan / ton; the on-site construction loss of the bridge erecting machine is 2000 yuan / day. The average beam production speed is 8 / 3 pieces per day, the maximum girder erection speed is 1 span / day, i.e. 4 pieces / day, and the beam production speed < the girder erection speed. The beam production duration is 508 / (8 / 3)+10=200.5 days. The shortest girder erection duration is 127 spans / (1 span / day)+bridge erecting machine turning field (14-1)×3 days=166 days. The on-site construction of the bridge erecting machine is 200.5-166=34.5 days. The on-site construction cost of the bridge erecting machine ΔC2=2000 yuan / day×34.5 days=69000 yuan. If the quality speed is increased, 1 set of formwork and 3 beam production seats need to be added, and the input cost is increased: ΔC1=30m formwork cost 28.7t×6800 yuan / t=195160 yuan>69000 yuan. ΔC1>ΔC2, and it is not economical to increase the prefabricated beam field input, the number of beam production seats and the formwork configuration remain unchanged, the scale of the beam storage area is increased, and the time of the bridge erecting machine entering the field is delayed.

[0106] Figure 3 A configuration device of a prefabricated beam production seat and formwork of an embodiment of the present application is shown in a schematic diagram, and the device comprises:

[0107] A first configuration module 11 is configured to determine the number of beam production seats based on the beam production time in the construction period plan and the size of the prefabricated beam field;

[0108] A second configuration module 12 is configured to calculate the average number of beams produced per day according to the number of beam production seats, divide the beam production process into multiple beam production periods based on the quantity ratio of various types of prefabricated beams, and determine the type and quantity of beams produced in a beam production period;

[0109] A third configuration module 13 is configured to determine the type and quantity of formworks in a beam production period based on the principle that the same type of formwork is used for prefabricated beams of the same shape and size, and determine the prefabricated beams produced per day and the formworks used.

[0110] The device of the embodiment can be used to perform Figure 1 The technical solutions of the method embodiments shown in the drawings have similar implementation principles and technical effects, and will not be described here.

[0111] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for configuring a beam pedestal and formwork in a precast beam yard, characterized in that: The following steps are involved: Determine the number of beam fabrication pedestals based on the beam fabrication time and prefabrication site dimensions in the construction schedule; The average number of beams produced per day is calculated based on the number of beam-making pedestals. Based on the ratio of the number of various precast beams, the beam-making process is divided into multiple beam-making cycles, and the type and quantity of beams produced in a beam-making cycle are determined. Based on the principle that precast beams of the same shape and size use the same type of formwork, determine the type and quantity of formwork within a beam production cycle, and determine the precast beams produced each day and the formwork used; in: Methods for determining the number N of beam-making pedestals include: S1. Calculate the minimum required number of beam pedestals based on the construction period requirements. The formula is as follows: where N a the minimum required number of beam benches; represents the upward rounding operation; M is the total number of precast beams; θ is the time required to produce a precast beam, in days; T is the beam production time in the project plan, in days; and α is a surplus factor, α >

1. S2, according to the size of the precast beam field and the length and spacing of the beam forming seats, determine the maximum number N of beam forming seats that the precast beam field can accommodate b ; S3, if N a ≤N b , go to S4; otherwise, the size of the prefabricated beam site does not meet the construction period requirements, and the construction period plan is adjusted to increase the beam making time and reduce N a , and / or by increasing the precast beam site area to increase N b , so that N a ≤N b ; S4, take N a To make the number of beam pedestal, that is, N = N a ; When the precast beam field is arranged by J field beam seats per row or per column, the integer j satisfying the inequality N a j x J ≤ N b is found, and the number of beam seats is corrected to N = j x J; The formula for calculating the average number of beams produced per day is: where k is the average number of beams per day, represents a floor operation. Methods for determining the number of beams produced in a beam production cycle include: Calculate the simplest integer ratio of the number of precast beams of each type, and calculate the sum m of the simplest integer ratios; Calculate the least common multiple of k and m M1 = [k, m], where M1 is the number of beams produced in one beam production cycle.

2. The method of configuring a girder fabrication bay and formwork for a precast girder fabrication yard as defined in claim 1, wherein, The precast beams produced every day and the formwork used in a beam production cycle are determined based on the following three conditions: Condition 1: The average number of beams produced per day in each beam production cycle is k; Condition 2: The ratio of the number of various precast beams in each beam-making cycle is the same; Condition 3: The number of the same type of formwork used simultaneously in each beam making cycle is minimized, and the sum of the number of each type of formwork is minimized.

3. The method of configuring a girder fabrication station and formwork for a precast girder yard as claimed in claim 2, wherein, The configuration of precast beams and formwork within one beam making cycle is as follows: the precast beam includes 1 high side beam, 2 middle beams and 1 low side beam; the formwork includes 0.5 sets of the high side of the high side beam, 2×0.5 sets of the high side of the middle beam, 2×0.5 sets of the low side of the middle beam, 0.5 sets of the low side of the low side beam, and 0.5 sets of the high side of the high side beam and 0.5 sets of the low side of the low side beam are combined into 1 set, which is used for one precast beam.

4. The method of configuring a girder fabrication station and formwork for a precast girder yard as claimed in claim 3, wherein, The method further comprises: if the number N of beam benches determined in step S4 is N < N b , adjusting the number of beam benches in the following way: Assume that the number of beams produced in one beam production cycle is M1 = n × m, where n is a positive integer and m is the sum of the simplest integer ratios of the number of precast beams of each type; According to conditions 2, 3, the precast beam configuration of each day in a beam manufacturing period is listed for different n, and the average daily beam manufacturing quantity k is calculated for each configuration, and the daily precast beam production quantity is not more than N b an integer of / θ; The maximum k is calculated max The number of beam benches N' that can be fully utilized by the template is calculated as follows: Adjust the number of beam benches to min(N', N b ).

5. The method of configuring a girdle and form for a precast beam factory of claim 4, wherein, The method further includes: optimizing the configuration of the beam-making pedestal and the template based on the matching degree between the beam-making speed and the beam-erecting speed, with the lowest total cost of beam-making and beam-erecting as the optimization goal.

6. A precast beam field beam production pedestal and form arrangement, characterized by, include: The first configuration module is used to determine the number of beam-making pedestals based on the beam-making time and prefabricated beam site size in the construction schedule; The second configuration module is used to calculate the average number of beams produced per day based on the number of beam production pedestals, divide the beam production process into multiple beam production cycles based on the ratio of the number of various precast beams, and determine the type and number of beams produced in a beam production cycle; The third configuration module is used to determine the type and quantity of templates in a beam production cycle based on the principle that precast beams of the same shape and size use the same type of templates, and to determine the precast beams produced each day and the templates used; in: The method for determining the number N of beam-making pedestals in the first configuration module includes: S1. Calculate the minimum required number of beam pedestals based on the construction period requirements. The formula is as follows: where N a the minimum required number of beam benches; represents the upward rounding operation; M is the total number of precast beams; θ is the time required to produce a precast beam, in days; T is the beam production time in the project plan, in days; and α is a surplus factor, α >

1. S2, according to the size of the precast beam field and the length and spacing of the beam forming seats, determine the maximum number N of beam forming seats that the precast beam field can accommodate b ; S3, if N a ≤N b , go to S4; otherwise, the size of the prefabricated beam site does not meet the construction period requirements, and the construction period plan is adjusted to increase the beam making time and reduce N a , and / or by increasing the precast beam site area to increase N b , so that N a ≤N b ; S4, take N a To make the number of beam seats, that is, N = N a ; The first configuration module is further configured to, when the prefabricated beam field is arranged by J field beam seats per row or per column, correct the number of beam seats to N=j×J that satisfies the inequality a j×J≤N b of an integer j. The formula for calculating the average number of beams produced per day in the second configuration module is: where k is the average number of beams per day, represents a floor operation; The third configuration module, the method for determining the number of beams produced in a beam production cycle includes: Calculate the simplest integer ratio of the number of precast beams of each type, and calculate the sum m of the simplest integer ratios; The least common multiple M1 = [k, m] of k and m is calculated, and M1 is the number of beam forming in one beam forming period.

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