CN114861269A - Identification method for support (super) danger large engineering of cast-in-place beam slab construction formwork - Google Patents
Identification method for support (super) danger large engineering of cast-in-place beam slab construction formwork Download PDFInfo
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Abstract
The invention relates to the technical field of construction safety management of constructional engineering, in particular to a method for identifying (super) danger large engineering supported by a cast-in-place beam slab construction formwork, and aims to solve the problem that whether the cast-in-place beam slab structure construction formwork support type engineering belongs to (super) danger large engineering or not can not be accurately judged. The invention comprises the following steps: calculating an included angle between a plane where a beam-slab structure to be poured is located and a horizontal plane and a vertical load additional coefficient according to an engineering drawing; determining the self-weight load value of the concrete member to be poured according to the sizes of the beam and the plate structure to be poured; determining the dead weight load value of the die carrier system to be selected; determining a construction load value according to a concrete pouring mode to be adopted; determining other load values; and calculating a load design value of the formwork support system, comparing the load design value with the critical engineering limit value and the critical engineering limit value exceeding a certain scale, and determining the engineering property. By the method, the engineering property can be judged quickly and corresponding management can be carried out, so that management and control omission is avoided.
Description
Technical Field
The invention relates to the technical field of construction safety management of constructional engineering, in particular to a method for identifying support (super) danger large engineering of a formwork in cast-in-place beam slab construction.
Background
In the practice of safety management of construction engineering, the management of (super) dangerous large engineering has important significance. For the template support engineering, according to the provisions of ' construction substance [ 2018 ] 31 ' of the department of housing and construction, the ' total construction load (design value of basic combination of load effect) of the template support engineering is 10kN/m 2 Or the concentrated line load is 15kN/m or more and the total construction load is 15kN/m 2 Or the concentrated line load of 20kN/m or more is respectively dangerous large engineering and dangerous large engineering exceeding a certain scale, a special construction scheme needs to be compiled, and the dangerous large engineering exceeding the certain scale needs to be proved by an organization expert.
In specific engineering, under the influence of multiple factors, an engineering manager cannot accurately identify whether the total construction load and the central line load of a cast-in-place reinforced concrete structure construction formwork support type engineering meet the load limit value of the standard, so that management and control omission of (ultra) dangerous large engineering often occurs, and safety management risk loopholes are caused. The method is characterized in that the method is used for solving the problem that whether the construction formwork support engineering of the cast-in-place beam slab structure belongs to (ultra) dangerous large engineering or not can not be accurately judged.
Disclosure of Invention
The invention aims to provide a method for identifying (ultra) dangerous large engineering supported by a cast-in-place beam slab construction formwork, which aims to solve the problem that whether the cast-in-place beam slab structure construction formwork supporting engineering belongs to (ultra) dangerous large engineering or not can not be accurately judged.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a method for identifying support (super) danger large engineering of a cast-in-place beam slab construction formwork comprises the following steps:
calculating the position of a beam-slab structure to be poured according to engineering drawingsThe included angle theta between the plane and the horizontal plane is determined, and the vertical load additional coefficient Y is determined θ (ii) a Determining the self-weight load value G of the concrete member to be cast according to the size of the beam and the plate structure to be cast 1 (ii) a Determining the dead weight load value G of the formwork system according to the type of the template to be selected 2 (ii) a Determining the construction load value Q of the formwork support system according to the concrete pouring mode to be adopted 1 (ii) a Determining other load values Q of support system of cast-in-situ beam slab construction formwork 2 (ii) a Calculating a design value F of the load of the formwork support system Beam BXH/slab H The calculation formula is F Beam BXH/slab H ＝Y θ ×(γ G ×G 1 +γ G ×G 2 )+γ Q ×Q 1 +γ Q ×Q 2 Permanent load component coefficient gamma G Taking 1.35, variable load component coefficient gamma Q Taking 1.4; f is to be Beam BXH/slab H Comparing with the critical engineering limit value and the critical engineering limit value exceeding a certain scale, and determining the engineering property.
Furthermore, theta is more than or equal to 0 and less than 90 degrees, and Y θ ＝(cosθ) -1 。
Further, for the concrete beam, its self-weight load value G 1 Rho × B × H (rho is the density of reinforced concrete — kN/m) 3 B is the width-m of the beam, H is the height-m) of the beam.
Further, for the reinforced concrete floor, the self-weight load value G 1 ρ × h (h is the floor thickness — m).
Furthermore, when a common wood template is adopted, the dead weight load standard value g of the template system 2 Wood ＝0.75kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the self-weight load value G of the formwork system 2 ＝g 2 Wood (ii) a For the load components of cast-in-place concrete beam line, the self-weight load value G of the formwork system 2 ＝(B+2H)×g 2 Wood 。
Furthermore, when a shaped steel template is adopted, the dead weight load standard value g of the template system 2 steel ＝1.10kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the self-weight load value G of the formwork system 2 ＝g 2 Steel (ii) a For the load components of cast-in-place concrete beam line, the self-weight load value G of the formwork system 2 ＝(B+2H)×g 2 steel 。
Further, when a general pouring mode such as an automobile pump is adopted, namely a pump pipe is not horizontally poured on the formwork support system, the construction load standard value q is 1 has no ＝2.0kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the construction load value Q 1 ＝q 1 has no (ii) a For the load components of the cast-in-place concrete beam line, the construction load value Q 1 ＝B×q 1 has no 。
Further, when a pouring mode of a material distributor and the like is adopted, namely a horizontal pouring pump pipe is arranged on a formwork support system, the construction load standard value q is 1 is provided with ＝4.0kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the construction load value Q 1 ＝q 1 is provided with (ii) a For the load components of the cast-in-place concrete beam line, the construction load value Q 1 ＝B×q 1 is provided with 。
Further, other load standard values q 2 ＝1.0kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the construction load value Q 2 ＝q 2 (ii) a For the load components of the cast-in-place concrete beam line, the construction load value Q 2 ＝B×q 2 。
Further, the critical engineering limit value is set as: total load of construction F Danger (plate) (kN/m 2 ) Concentrated line load F Danger (Beam) (kN/m); the critical engineering limit value exceeding a certain scale is set as follows: total load of construction F Super-critical (plate) (kN/m 2 ) Concentrated line load F Super-critical (Beam) (kN/m)；
For cast-in-place concrete floor class face load components: if F Beam BXH/slab H ＜F Danger (plate) The method does not belong to dangerous engineering; if F Danger (plate) ≤F Beam BXH/slab H ＜F Super-critical (plate) The method belongs to a dangerous engineering, but does not belong to a dangerous engineering with a certain scale; if F Beam BXH/slab H ≥F Super-danger (plate) The method belongs to dangerous engineering with a certain scale;
for cast-in-place concrete beam line load components: if F Beam B H/plate H ＜F Danger (Beam) The method does not belong to dangerous engineering; if F Danger (Beam) ≤F Beam BXH/slab H ＜F Super-critical (Beam) The method belongs to a dangerous engineering, but does not belong to a dangerous engineering with a certain scale; if F Beam BXH/slab H ≥F Super-critical (Beam) It belongs to a dangerous engineering with a certain scale.
By combining the technical scheme, the invention can realize the technical effects that:
the invention provides a method for identifying support (super) danger of a formwork of cast-in-place beam slab construction large project, which comprises the following steps of: calculating an included angle theta between a plane where a beam-slab structure to be poured is located and a horizontal plane according to an engineering drawing, and determining a vertical load additional coefficient Y θ (ii) a Determining the self-weight load value G of the concrete member to be cast according to the size of the beam and the plate structure to be cast 1 (ii) a Determining the dead weight load value G of the formwork system according to the type of the template to be selected 2 (ii) a Determining the construction load value Q of the formwork support system according to the concrete pouring mode to be adopted 1 (ii) a Determining other load values Q of support system of cast-in-situ beam slab construction formwork 2 (ii) a Calculating a design value F of the load of the formwork support system Beam BXH/slab H The calculation formula is F Beam BXH/slab H ＝Y θ ×(γ G ×G 1 +γ G ×G 2 )+γ Q ×Q 1 +γ Q ×Q 2 Permanent load component coefficient gamma G Taking 1.35, variable load component coefficient gamma Q Taking 1.4; f is to be Beam BXH/slab H Comparing with the critical engineering limit value and the critical engineering limit value exceeding a certain scale, and determining the engineering property.
The identification method for the cast-in-place beam slab construction formwork support (super) danger engineering provided by the invention is used for calculating, and can be used for quickly and accurately judging whether the cast-in-place beam slab structure construction formwork support engineering belongs to the (super) danger engineering or not, so that an engineering manager can control the engineering conveniently, corresponding management work can be carried out timely, and the risk loophole of safety management caused by management and control omission is avoided.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, a method for identifying the (ultra) danger large engineering supported by the cast-in-place beam slab construction formwork is lacked, and whether the cast-in-place beam slab structure construction formwork support engineering belongs to the (ultra) danger large engineering or not can not be accurately judged.
In view of the above, the invention provides a method for identifying a large (super) danger project supported by a cast-in-place beam slab construction formwork, which comprises the following steps: calculating an included angle theta between a plane where a beam-slab structure to be poured is located and a horizontal plane according to an engineering drawing, and determining a vertical load additional coefficient Y θ (ii) a Determining the self-weight load value G of the concrete member to be cast according to the size of the beam and the plate structure to be cast 1 (ii) a Determining the dead weight load value G of the formwork system according to the type of the template to be selected 2 (ii) a Determining the construction load value Q of the formwork support system according to the concrete pouring mode to be adopted 1 (ii) a Determining other load values Q of support system of cast-in-situ beam slab construction formwork 2 (ii) a Calculating a design value F of the load of the formwork support system Beam BXH/slab H The calculation formula is F Beam BXH/slab H ＝Y θ ×(γ G ×G 1 +γ G ×G 2 )+γ Q ×Q 1 +γ Q ×Q 2 Permanent load component coefficient gamma G Taking 1.35, variable load component coefficient gamma Q Taking 1.4; f is to be Beam BXH/slab H Comparing with the critical engineering limit value and the critical engineering limit value exceeding a certain scale, and determining the engineering property.
The identification method for the cast-in-place beam slab construction formwork support (super) danger engineering provided by the invention is used for calculating, and can be used for quickly and accurately judging whether the cast-in-place beam slab structure construction formwork support engineering belongs to the (super) danger engineering or not, so that an engineering manager can control the engineering conveniently, corresponding management work can be carried out timely, and the risk loophole of safety management caused by management and control omission is avoided.
The method for identifying the support (super) danger of the cast-in-place beam slab construction formwork large project provided by the embodiment comprises the following specific steps:
s100, calculating an included angle theta between a plane where a beam-slab structure to be poured is located and a horizontal plane according to an engineering drawing, and determining a vertical load additional coefficient Y θ ，0≤θ＜90°，Y θ ＝(cosθ) -1 。
S200, determining the self-weight load value G of the concrete member to be poured according to the size of the beam and the plate structure to be poured 1 ：
For concrete beam, its deadweight load value G 1 Rho × B × H (rho is the density of reinforced concrete — kN/m) 3 B is the width-m of the beam, H is the height-m of the beam);
for reinforced concrete floor, its dead load value G 1 ρ × h (h is the floor thickness — m).
S300, determining the dead weight load value G of the formwork system according to the type of the template to be selected 2 ：
When a common wood template is adopted, the dead weight load standard value g of the template system 2 Wood ＝0.75kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the self-weight load value G of the formwork system 2 ＝g 2 Wood (ii) a For the load components of cast-in-place concrete beam line, the self-weight load value G of the formwork system 2 ＝(B+2H)×g 2 Wood ；
When the shaped steel template is adopted, the dead weight load standard value g of the template system 2 steel ＝1.10kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the self-weight load value G of the formwork system 2 ＝g 2 steel (ii) a For the load type component of the cast-in-place concrete beam line, the self-weight load of the formwork systemLoad value G 2 ＝(B+2H)×g 2 steel 。
S400, determining a construction load value Q of a formwork support system according to a concrete pouring mode to be adopted 1 ：
When a pouring mode of a common condition such as an automobile pump is adopted, namely a pump pipe is not horizontally poured on a formwork support system, the construction load standard value q is 1 has no ＝2.0kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the construction load value Q 1 ＝q 1 has no (ii) a For the load components of the cast-in-place concrete beam line, the construction load value Q 1 ＝B×q 1 has no ；
When a pouring mode of a material distributor and the like is adopted, namely a horizontal pouring pump pipe is arranged on a formwork support system, the construction load standard value q is 1 is provided with ＝4.0kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the construction load value Q 1 ＝q 1 is provided with (ii) a For the load components of the cast-in-place concrete beam line, the construction load value Q 1 ＝B×q 1 is provided with 。
S500-determining other load values Q of support system of cast-in-place beam slab construction formwork 2 ：
Other load standard value q 2 ＝1.0kN/m 2 (ii) a For the load component of the cast-in-place concrete floor class surface, the construction load value Q 2 ＝q 2 (ii) a For the load components of the cast-in-place concrete beam line, the construction load value Q 2 ＝B×q 2 。
S600-calculating a design value F of load of a formwork support system Beam BXH/slab H The calculation formula is F Beam BXH/slab H ＝Y θ ×(γ G ×G 1 +γ G ×G 2 )+γ Q ×Q 1 +γ Q ×Q 2 ，
Permanent load component coefficient gamma G Taking 1.35, variable load component coefficient gamma Q Take 1.4.
S700-with F Beam BXH/slab H Comparing with the critical engineering limit value and the critical engineering limit value exceeding a certain scale, and determining the engineering property:
dangerous and big workerThe program limit value is set as: total load of construction F Danger (plate) (kN/m 2 ) Concentrated line load F Danger (Beam) (kN/m); the critical engineering limit value exceeding a certain scale is set as follows: total load of construction F Super-critical (plate) (kN/m 2 ) Concentrated line load F Super-critical (Beam) (kN/m)；
For cast-in-place concrete floor class face load components: if F Beam BXH/slab H ＜F Danger (plate) The method does not belong to dangerous engineering; if F Danger (plate) ≤F Beam BXH/slab H ＜F Super-critical (plate) The method belongs to a dangerous engineering, but does not belong to a dangerous engineering with a certain scale; if F Beam BXH/slab H ≥F Super-critical (plate) The method belongs to dangerous engineering with a certain scale;
for cast-in-place concrete beam line load components: if F Beam B H/plate H ＜F Danger (Beam) The method does not belong to dangerous engineering; if F Danger (Beam) ≤F Beam BXH/slab H ＜F Super-critical (Beam) The method belongs to a dangerous engineering, but does not belong to a dangerous engineering with a certain scale; if F Beam BXH/slab H ≥F Super-critical (Beam) It belongs to a dangerous engineering with a certain scale.
Obviously, the five steps S100-S500 are not required in sequence.
The method for identifying the support (super) danger large engineering of the cast-in-place beam slab construction formwork provided by the embodiment is specifically applied as follows:
an underground engineering is identified, the underground engineering is a single-layer reinforced concrete frame structure, the size of a main beam is 400 multiplied by 1200mm, the size of a secondary beam is 300 multiplied by 1000mm, the thickness of a floor slab is 180mm, and the structural plane is horizontal. The construction scheme is drawn up as follows: the template type is a shaping steel template, and concrete pouring is carried out by adopting a distributing machine.
First, determine the vertical load add-on Y θ Because the structure plane is horizontal, the included angle theta between the plane of the cast-in-place beam-slab structure and the horizontal plane is 0 0 ,Y θ ＝(cosθ) -1 ＝(cos0 0 ) -1 ＝1。
Secondly, determining the dead load value G of the member to be cast 1 The original workerThe concrete beam is adopted, so:
deadweight load value G of main beam concrete member 1(400×1200) ＝ρ×B×H＝25×0.4×1.2＝12kN/m；
Deadweight load value G of secondary beam concrete member 1(300×1000) ＝ρ×B×H＝25×0.3×1＝7.5kN/m；
Deadweight load value G of floor concrete member 1(180) ＝ρ×h＝25×0.18＝4.5kN/m 2 。
Thirdly, determining the dead load value G of the die carrier system 2 The project adopts a shaping steel template, so:
the dead load value of the girder formwork system is G 2(400×1200) ＝(B+2H)×g 2 steel ＝(0.4+1.2×2)×1.1＝3.08kN/m；
The dead load value of the secondary beam formwork system is G 2(300×1000) ＝(B+2H)×g 2 steel ＝(0.3+1×2)×1.1＝2.53kN/m；
The deadweight load value of the floor formwork system is G 2(180) ＝g 2 steel ＝1.10kN/m 2 。
Fourthly, determining a construction load value Q 1 This engineering concrete placement adopts the cloth machine to pour, then:
construction load value Q of girder formwork system 1(400×1200) ＝B×q 1 is provided with ＝0.4×4＝1.6kN/m；
Construction load value Q of floor formwork system 1(300×1000) ＝B×q 1 is provided with ＝0.3×4＝1.2kN/m；
Construction load value Q of floor formwork system 1(180) ＝q 1 is provided with ＝4.0kN/m 2 。
Fifthly, determining other load values Q of the support system of the cast-in-place beam slab construction formwork 2 ：
Construction load value Q of girder formwork system 2(400×1200) ＝B×q 2 ＝0.4×1＝0.4kN/m；
Construction load value Q of secondary beam formwork system 2(300×1000) ＝B×q 2 ＝0.3×1＝0.3kN/m；
Construction of floor formwork systemLoad value Q 2(180) ＝q 2 ＝1.0kN/m 2 。
Sixthly, calculating a design value F of the load of the formwork support system Beam BXH/slab H ：
F Beam 400 x 1200 ＝1×(1.4×12+1.4×3.08)+1.35×1.4+1.35×0.4＝23.542kN/m；
F Beam 300 x 1000 ＝1×(1.4×7.5+1.4×2.53)+1.35×1.2+1.35×0.3＝16.067kN/m；
F Plate 180 ＝1×(1.4×4.5+1.4×1.1)+1.35×4+1.35×1＝14.59kN/m 2 。
The seventh step is to mix F Beam BXH/slab H Comparing with the critical engineering limit value and the critical engineering limit value exceeding a certain scale, and determining the engineering property.
According to the (over) dangerous large engineering limit value specified in the' build material [ 2018 ] 31 2 Or concentrated line load 15 kN/m' and construction total load 15kN/m 2 Or concentrating the line load to 20kN/m, F can be determined Danger (plate) ＝10kN/m 2 ；F Danger (Beam) ＝15kN/m；F Super-critical (plate) ＝15kN/m 2 ；F Super-critical (Beam) ＝20kN/m。
Therefore F Beam 400 x 1200 >F Super-critical (Beam) The formwork support engineering belongs to dangerous engineering with a certain scale;
F danger (Beam) <F Beam 300 x 1000 <F Super-critical (Beam) The formwork support engineering belongs to dangerous engineering;
F danger (plate) <F Plate 180 <F Super-critical (plate) And the formwork support engineering belongs to dangerous engineering.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for identifying support (super) danger large engineering of a cast-in-place beam slab construction formwork is characterized by comprising the following steps:
calculating the included angle theta between the plane of the beam-slab structure to be poured and the horizontal plane according to an engineering drawing, and determining a vertical load additional coefficient Y θ ；
Determining the self-weight load value G of the concrete member to be cast according to the size of the beam and the plate structure to be cast 1 ；
Determining the dead weight load value G of the formwork system according to the type of the template to be selected 2 ；
Determining the construction load value Q of the formwork support system according to the concrete pouring mode to be adopted 1 ；
Determining other load values Q of support system of cast-in-situ beam slab construction formwork 2 ；
Calculating a design value F of the load of the formwork support system Beam BXH/slab H The calculation formula is
F Beam BXH/slab H ＝Y θ ×(γ G ×G 1 +γ G ×G 2 )+γ Q ×Q 1 +γ Q ×Q 2 ，
Permanent load component coefficient gamma G Taking 1.35, variable load component coefficient gamma Q Taking 1.4;
f is to be Beam BXH/slab H Comparing with the critical engineering limit value and the critical engineering limit value exceeding a certain scale, and determining the engineering property.
2. The method for identifying the (super) danger of the formwork support in the construction of the cast-in-place beam slab as claimed in claim 1, wherein theta is more than or equal to 0 and less than 90 degrees, and Y is more than or equal to Y θ ＝(cosθ) -1 。
3. The method for identifying the (super) danger of the formwork support in the construction of the cast-in-place beam slab as claimed in claim 2, wherein the self-weight load value of the concrete beamG 1 Rho × B × H (rho is the density of reinforced concrete — kN/m) 3 B is the width-m of the beam, H is the height-m) of the beam.
4. The method for identifying the (super) danger of the formwork support in the construction of the cast-in-place beam slab as claimed in claim 3, wherein the self-weight load value G of the reinforced concrete floor slab 1 ρ × h (h is the floor thickness — m).
5. The method for identifying the support (super) danger project of the cast-in-place beam slab construction formwork according to claim 4,
when a common wood template is adopted, the dead weight load standard value g of the template system 2 Wood ＝0.75kN/m 2 ；
For the load component of the cast-in-situ concrete floor class surface, the self-weight load value G of the formwork system 2 ＝g 2 Wood ；
For the load components of cast-in-place concrete beam line, the self-weight load value G of the formwork system 2 ＝(B+2H)×g 2 Wood 。
6. The method for identifying the support (super) danger of the cast-in-place beam slab construction formwork large project according to claim 5,
when the shaped steel template is adopted, the dead weight load standard value g of the template system 2 steel ＝1.10kN/m 2 ；
For the load component of the cast-in-place concrete floor class surface, the self-weight load value G of the formwork system 2 ＝g 2 steel ；
For the load components of cast-in-place concrete beam line, the self-weight load value G of the formwork system 2 ＝(B+2H)×g 2 steel 。
7. The method for identifying the (super) dangerous large project of the cast-in-place beam slab construction formwork support according to claim 6,
when a pouring mode of a common condition such as an automobile pump is adopted, namely a pump pipe is not horizontally poured on a formwork support system, the construction load standard is standardValue q 1 has no ＝2.0kN/m 2 ；
For the load component of the cast-in-place concrete floor class surface, the construction load value Q 1 ＝q 1 has no ；
For the load components of the cast-in-place concrete beam line, the construction load value Q 1 ＝B×q 1 has no 。
8. The method for identifying the support (super) danger project of the cast-in-place beam slab construction formwork according to claim 7,
when a pouring mode of a material distributor and the like is adopted, namely a horizontal pouring pump pipe is arranged on a formwork support system, the construction load standard value q is 1 is provided with ＝4.0kN/m 2 ；
For the load component of the cast-in-place concrete floor class surface, the construction load value Q 1 ＝q 1 is provided with ；
For the load components of the cast-in-place concrete beam line, the construction load value Q 1 ＝B×q 1 is provided with 。
9. The method for identifying the (ultra) danger of the formwork support in the construction of the cast-in-place beam slab as claimed in claim 8, wherein the standard value q of other loads is 2 ＝1.0kN/m 2 ；
For the load component of the cast-in-place concrete floor class surface, the construction load value Q 2 ＝q 2 ；
For the load components of the cast-in-place concrete beam line, the construction load value Q 2 ＝B×q 2 。
10. The method for identifying the support (super) danger project of the cast-in-place beam slab construction formwork according to claim 9,
the critical engineering limit value is set as follows: total load of construction F Danger (plate) (kN/m 2 ) Concentrated line load F Danger (Beam) (kN/m)；
The critical engineering limit value exceeding a certain scale is set as follows: total load of construction F Super-critical (plate) (kN/m 2 ) Concentrated line load F Super-critical (Beam) (kN/m)；
For cast-in-place concrete floor class face load components:
if F Beam BXH/slab H ＜F Danger (plate) The method does not belong to dangerous engineering;
if F Danger (plate) ≤F Beam BXH/slab H ＜F Super-critical (plate) The method belongs to a dangerous engineering, but does not belong to a dangerous engineering with a certain scale;
if F Beam BXH/plate H ≥F Super-critical (plate) The method belongs to dangerous engineering with a certain scale;
for cast-in-place concrete beam line load components:
if F Beam BXH/slab H ＜F Danger (Beam) The method does not belong to dangerous engineering;
if F Danger (Beam) ≤F Beam BXH/slab H ＜F Super-danger (Beam) The method belongs to a dangerous engineering, but does not belong to a dangerous engineering with a certain scale;
if F Beam BXH/slab H ≥F Super-critical (Beam) It belongs to a dangerous engineering with a certain scale.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116127557A (en) * | 2022-11-30 | 2023-05-16 | 北京建工集团有限责任公司 | BIM-based ultra-limit beam support system arrangement method, storage and calculation equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116127557A (en) * | 2022-11-30 | 2023-05-16 | 北京建工集团有限责任公司 | BIM-based ultra-limit beam support system arrangement method, storage and calculation equipment |
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