CN117668972B - Design and construction method of installing construction hoist on cantilever structure - Google Patents

Design and construction method of installing construction hoist on cantilever structure Download PDF

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CN117668972B
CN117668972B CN202311558805.3A CN202311558805A CN117668972B CN 117668972 B CN117668972 B CN 117668972B CN 202311558805 A CN202311558805 A CN 202311558805A CN 117668972 B CN117668972 B CN 117668972B
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elevator
lifter
construction
foundation
unit
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CN117668972A (en
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左亭亭
张爱军
曹志伟
朱孝瑞
姜钰丽
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Shandong Jinchi Construction Co ltd
Shandong Goldencity Construction Co ltd
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Shandong Jinchi Construction Co ltd
Shandong Goldencity Construction Co ltd
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/44—Foundations for machines, engines or ordnance
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

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Abstract

本发明属于建筑技术领域，具体为一种悬挑结构上安装施工升降机设计与施工方法。本发明包括：升降机基础设计、悬挑结构承载力复核计算、升降机基础施工、升降机安装。本发明通过升降机荷载作用下的悬挑结构的框架梁承载力验算，保障了升降机施工与结构安全。通过在悬挑结构施工前按照框架梁验算配筋面积施工配筋，解决了悬挑结构的框架梁底设置卸载支撑影响下道工序的施工技术难题。通过在悬挑结构上安装施工升降机，解决了施工现场不满足升降机安装空间及位置要求，安全可靠，大幅度节约人工费及工期，经济与社会效益显著。

The present invention belongs to the field of building technology, and specifically is a design and construction method for installing a construction elevator on a cantilever structure. The present invention includes: elevator foundation design, cantilever structure bearing capacity verification calculation, elevator foundation construction, and elevator installation. The present invention ensures the construction and structural safety of the elevator by verifying the bearing capacity of the frame beam of the cantilever structure under the load of the elevator. By constructing the reinforcement according to the calculated reinforcement area of the frame beam before the construction of the cantilever structure, the construction technical problem of setting an unloading support at the bottom of the frame beam of the cantilever structure affecting the next process is solved. By installing a construction elevator on the cantilever structure, the problem of the construction site not meeting the installation space and location requirements of the elevator is solved. It is safe and reliable, greatly saves labor costs and construction period, and has significant economic and social benefits.

Description

Design and construction method for installing construction lifter on overhanging structure
Technical Field
The invention relates to a design and construction method of an installation construction lifter on an overhanging structure, which is mainly applied to the technical field of overhanging structures.
Background
The design boundary between the main building and the peripheral skirt house of the building engineering is often provided with overhanging type deformation joints, or in order to strengthen the effect of the front vertical face of the main building, the conventional design distance of the decorative columns is generally smaller than or equal to 1.0m, so that the construction lifter cannot be installed on the construction site, and only a person can carry out shoulder-shouldering to the construction layer of the main building to carry the construction, thereby greatly increasing a series of problems of non-conforming to environmental protection, energy conservation, construction period and the like.
The Chinese patent CN105672471A discloses a construction elevator foundation and a construction method thereof, wherein one end of two box-shaped steel tube beams are just connected with a shear wall, and the other end is simply supported with a frame beam, so that the basic requirements of a construction elevator foundation fixed support and a structural balance system with the foundation weight larger than the elevator load are not met, the elevator lattice frame can be subjected to torsion deformation and even collapse accidents under the action of strong wind load, and the construction elevator foundation is common knowledge known to a person skilled in the art. This patent is only one envisaged and is not practical.
In summary, the design and construction of the construction elevator installed on the overhanging structure has become a national key technical problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a design and construction method for installing a construction lifter on an overhanging structure, which is safe, reliable, economical, reasonable, energy-saving, environment-friendly and simple and convenient to operate.
The invention relates to a design and construction method for installing a construction lifter on an overhanging structure, which is characterized by comprising the following steps:
1. Elevator foundation design
1. Determination of elevator base geometry
The frame beams of the cantilever structures at the two sides of the deformation joint extend 50 mm-100 mm to be the basic width of the lifter, and the length and the thickness of the frame beams are determined according to the specification of the lifter;
2. elevator load calculation
2.1, The elevator height is calculated as h=h 1-h2+h3
Wherein, H is the height of the lifter, and the unit is m;
h 1, the elevation of the top of the building structure, and the unit is m;
h 2, the elevation of the foundation bottom of the lifter, and the unit is m;
h 3 is the height of the free end of the top of the lifter, and the unit is m;
2.2, the number of standard knots is n=H.l
Wherein n is the number of standard knots;
H is the height of the lifter, and the unit is m;
l-height of each standard section, unit is m;
2.3, the dead weight design value of the lifter is calculated according to the following formula F 1＝k1(P1+P2)+k2(P3+P4+P5
Wherein F 1 is the dead weight design value of the lifter, and the unit is kN;
k 1、k2, respectively taking 2 and 1.4 of the dynamic coefficient of the running load of the lifter;
p 1, the dead weight of the lifting cage of the lifter, and the unit is kN;
P 2 -the rated load of the elevator in kN;
p 3 -the weight of the elevator in kN;
P 4 -the weight of the standard section of the elevator (n. Times. The weight of a single standard section), in kN;
p 5 -the dead weight of other parts of the lifter in kN;
the self weight of the lifter comprises the self weight of the lifting cage of the lifter, the rated load of the lifter, the attached self weight of the lifter, the standard section self weight of the lifter and the self weights of other accessories of the lifter.
2.4, Calculating the design value of the uniformly distributed load of the elevator foundation according to the following formula:
wherein, the Q-elevator foundation is uniformly distributed with load design values in units of KN/m2;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
A is the bottom area of the lifter grid structure, and the unit is m2;
2.5, the self-weight design value of the elevator foundation is calculated by F 2＝k3 gamma abh
Wherein F 2 is the self-weight design value of the elevator foundation, and the unit is kN;
k 3, taking a dynamic coefficient of the running load of the lifter to be 1.2;
Gamma-reinforced concrete volume weight in KN/m 3;
a, the basic length of the lifter is m;
b-elevator base width in m;
h-the basic thickness of the lifter, wherein the unit is m;
3. Elevator base load calculation
4. Edge sealing beam arrangement for elevator foundation
A base edge sealing beam is arranged on two sides of the width direction of the elevator base in parallel;
2. Cantilever structure bearing capacity rechecking calculation
1. Frame beam line load calculation of overhanging structure
1.1, The line load of the frame beam of the cantilever structure acted by the self weight of the lifter is calculated according to the following formula:
wherein q 1 is the linear load of the self weight of the lifter on the frame beam, and the unit is KN/m;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
a 1, applying a self-weight design value of the lifter to the effective length of the frame beam, and taking 1m;
b-elevator base width in m;
1.2, the line load of the frame beam of the cantilever structure acted by the elevator foundation is calculated according to the following formula:
wherein q 2 is the linear load of the elevator foundation on the frame beam, and the unit is KN/m;
F 2, a self-weight design value of the elevator foundation, wherein the unit is kN;
a, the basic length of the lifter is m;
b-elevator base width in m;
2. calculation of bearing capacity of cantilever structure
3. The frame beam design of the overhanging structure is compared with the checking and calculating reinforcement bars;
3. elevator foundation construction
1. Positioning a central line and a side line according to a basic design plan of the construction elevator;
2. Elevator foundation bottom formwork support arrangement
2.1 When the cantilever structures at the two sides of the deformation joint have height differences
1) A supporting belt is arranged on the frame beam on the higher side of the elevator foundation in a flat mode, and a supporting beam is arranged on the frame beam on the lower side of the elevator foundation in a flat mode, so that the supporting belt is flush with the top of the supporting beam;
2) The construction method of the lower side support beam template and the elevator foundation bottom template is the same as the traditional technology;
2.2, when the elevation of overhanging structures at two sides of the deformation joint is the same
1) Support belts with the same height are arranged on frame beams on two sides of the elevator foundation in a flat mode;
2) Before the elevator foundation bottom die plate is installed, fully paving the extruded polystyrene board, and then installing an elevator foundation bottom die;
3. When the elevator foundation is installed on a roof which has completed heat preservation and waterproof layer engineering, a wood backing plate is arranged at the bottom of a supporting belt or a supporting beam;
4. the side form construction, the steel bar binding and the concrete pouring of the foundation of the elevator are the same as the traditional construction method;
4. elevator installation
1) The elevator foundation concrete reaches the design strength and the bottom template is removed;
2) Installing the construction hoist by a professional according to the construction hoist installation instruction.
The basic length and thickness of the lifter in the step 1 are determined according to the specification of the lifter, and are determined according to the basic design drawing in the specification of the selected lifter.
And step one, namely calculating the basic bearing capacity of the lifter by adopting a special-shaped plate module in the tool box software of the straightening structure, and checking whether the bearing capacity, deflection and cracks under the effect of the design value of the local uniform load of the orthographic projection of the lifter lattice frame meet the requirements.
And in the step one, the height of the edge sealing beam is equal to the basic thickness of the lifter, the width meets the requirement of the height-width ratio of 2-3.5, and the reinforcement meets the requirement that the reinforcement rate of the basic structure is more than or equal to 0.2%.
And step 2, calculating the bearing capacity of the cantilever structure, namely adopting PKPM structural design modules to respectively establish vertical component and horizontal component models of three vertical and horizontal shaft nets in the range of the cantilever structure at two sides, and checking whether the bearing capacity, deflection and cracks of the frame beams of the cantilever structure at two sides meet the requirements under the action of all loads of the cantilever structure.
Step two serial number 3 frame beam design and checking and calculating reinforcement comparison of the cantilever structure:
1) When the structural design reinforcement of the frame beam of the overhanging structure is larger than or equal to the structural checking reinforcement area and the deflection and the cracks meet the requirements, judging that the frame beam of the overhanging structure meets the bearing capacity requirements;
2) When the frame beam of the overhanging structure does not meet the bearing capacity requirement, the frame beam of the overhanging structure is constructed according to the checking and calculating reinforcement area, so that the frame beam of the overhanging structure is ensured to meet the bearing capacity requirement under the load action of the lifter.
The supporting belt with the number 2 is formed by casting concrete with the thickness of 60 mm-100 mm and the strength grade of C25-C30.
The support beam in the step III is a reinforced concrete beam with the reinforcement ratio being more than or equal to 0.2% and the concrete strength grade being C25-C30.
And step three, the extruded polystyrene board with the serial number 2 is formed by adopting the extruded polystyrene board with the thickness of 60-100 mm to block the transmission of the basic load of the lifter to the cantilever board, so as to prevent the damage of the cantilever board.
Step three serial number 3 the wood backing plate be in order to enlarge the area of contact of supporting belt or supporting beam and roofing heat preservation waterproof layer to roofing heated board bearing capacity satisfies the lift load requirement, wood backing plate thickness gets 100mm ~150mm, and length is calculated according to following formula:
wherein, the length of the L-wood backing plate is m;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
F 2, a self-weight design value of the elevator foundation, wherein the unit is kN;
a 1, applying a self-weight design value of the lifter to the effective length of the frame beam, and taking 1m;
a, the basic length of the lifter is m;
The design value of the compressive strength of the sigma-extruded polystyrene board is given in kN/m2.
The beneficial effects of the invention are as follows:
1) Through the design of the elevator span foundation, the load of the elevator is directly transmitted to the frame beam of the overhanging structure with higher bearing capacity, and the important technical problem that the construction elevator cannot be installed on the overhanging structure is solved.
2) The construction and the structural safety of the elevator are ensured through checking and calculating the bearing capacity of the frame beam of the cantilever structure under the load action of the elevator.
3) The construction technical problem that the unloading support is arranged at the bottom of the frame beam of the overhanging structure to influence the next procedure is solved by constructing the reinforcement according to the reinforcement area calculated by the frame beam before the overhanging structure is constructed.
4) The technical problem that the cantilever plate is damaged due to the fact that the base load of the lifter is transferred to the cantilever plate is solved by fully paving the extruded polystyrene plate at the bottom of the base of the lifter.
5) By arranging the wood backing plate at the bottom of the supporting belt or the supporting beam, the contact area between the supporting belt or the supporting beam and the roof waterproof protective layer is enlarged, and the technical problem that the roof heat-insulating layer does not meet the construction load requirement of the elevator is solved.
6) The construction method is simple, the construction speed is high, the construction comprehensive cost is greatly saved, the welding phosgene pollution is avoided, the requirements of green construction, energy conservation and environmental protection are met, and the economic and social benefits are obvious.
Drawings
FIG. 1 is a plan view of an elevator base design;
FIG. 2 is a cross section A-A with a height difference on both sides of the deformation joint;
FIG. 3 is a view of a section A-A where the elevations of both sides of the deformation joint are the same;
Figure 4 shows the case of A-A section with a height difference on both sides of the deformation joint and the waterproof construction.
The building block comprises a lifting foundation, a cantilever structure, a frame beam, a lifting lattice frame, a supporting belt, a supporting beam, a wood base plate, a heat insulation waterproof layer, a deformation joint, a sealing edge beam and a sealing edge beam.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
As shown in fig. 1 to 4, the design and construction method for installing a construction lifter on an overhanging structure comprises the following specific steps:
1. Elevator foundation design
1. Determination of elevator base geometry
The frame beams 3 of the cantilever structures 2 at the two sides of the deformation joint 9 extend 50 mm-100 mm to be the width of the elevator foundation 1, and the length and the thickness of the frame beams are determined according to the specification of the elevator;
2. elevator load calculation
2.1, The elevator height is calculated as h=h 1-h2+h3
Wherein, H is the height of the lifter, and the unit is m;
h 1, the elevation of the top of the building structure, and the unit is m;
h 2, the elevation of the foundation bottom of the lifter, and the unit is m;
h 3 is the height of the free end of the top of the lifter, and the unit is m;
2.2, the number of standard knots is n=H.l
Wherein n is the number of standard knots;
H is the height of the lifter, and the unit is m;
l-height of each standard section, unit is m;
2.3, the dead weight design value of the lifter is calculated according to the following formula, wherein F 1＝k1(P1+P2)+k2(P3+P4+P5) is F 1, the dead weight design value of the lifter is in kN;
k 1、k2, respectively taking 2 and 1.4 of the dynamic coefficient of the running load of the lifter;
p 1, the dead weight of the lifting cage of the lifter, and the unit is kN;
P 2 -the rated load of the elevator in kN;
p 3 -the weight of the elevator in kN;
P 4 -the weight of the standard section of the elevator (n. Times. The weight of a single standard section), in kN;
p 5 -the dead weight of other parts of the lifter in kN;
2.4, calculating the design value of the uniformly distributed load of the elevator foundation according to the following formula:
wherein, the Q-elevator foundation is uniformly distributed with load design values in units of KN/m2;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
A is the bottom area of the lifter grid structure, and the unit is m2;
2.5, the self-weight design value of the elevator foundation is calculated by F 2＝k3 gamma abh
Wherein F 2 is the self-weight design value of the elevator foundation, and the unit is kN;
k 3, taking a dynamic coefficient of the running load of the lifter to be 1.2;
Gamma-reinforced concrete volume weight in KN/m 3;
a, the basic length of the lifter is m;
b-elevator base width in m;
h-the basic thickness of the lifter, wherein the unit is m;
3. Elevator base load calculation
4. Edge sealing beam arrangement for elevator foundation
Base edge sealing beams 10 are arranged on two sides of the width direction of the elevator base 1;
2. Cantilever structure bearing capacity rechecking calculation
1. Frame beam 3 line load calculation of overhanging structure 2
1.1, The line load of the frame beam 3 of the cantilever structure 2 acted by the self weight of the lifter is calculated according to the following formula:
wherein q 1 is the linear load of the self weight of the lifter on the frame beam, and the unit is KN/m;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
a 1, applying a self-weight design value of the lifter to the effective length of the frame beam, and taking 1m;
b-elevator base width in m;
1.2, the line load of the elevator foundation 1 on the frame beam 3 of the overhanging structure 2 is calculated as follows:
Wherein q 2 is the linear load of the elevator foundation on the frame beam 3, and the unit is KN/m;
F 2, a self-weight design value of the elevator foundation, wherein the unit is kN;
a, the basic length of the lifter is m;
b-elevator base width in m;
2. calculation of bearing capacity of cantilever structure
3. Frame beam 3 design and checking reinforcement comparison of overhanging structure 2
3. Elevator foundation construction
1. Positioning a central line and a side line according to a plan designed on the construction elevator foundation 1;
2. Elevator foundation bottom formwork support arrangement
2.1, When the cantilever structures 2 at the two sides of the deformation joint 9 have the height difference
1) A supporting belt 5 is arranged on the frame beam 3 on the higher side of the elevator foundation 1, a supporting beam 6 is arranged on the frame beam 3 on the lower side of the elevator foundation 1, and the supporting belt 5 is flush with the top of the supporting beam 6;
2) The extruded polystyrene board is fully paved before the bottom template of the lifter foundation 1 on the higher side is installed, and then the bottom die of the lifter foundation 1 is installed. The construction method of the lower side supporting beam 6 template and the bottom template of the elevator foundation 1 is the same as that of the traditional technology;
2.2, when the elevation of the overhanging structures 2 at two sides of the deformation joint 9 is the same
1) Support belts 5 with the same height are arranged on frame beams 3 on two sides of the elevator foundation 1 in a flat mode;
2) Before the bottom template of the elevator foundation 1 is installed, fully paving an extruded polystyrene board, and then installing a bottom die of the elevator foundation 1;
3. when the elevator foundation 1 is installed on a roof which has completed the heat preservation and waterproof layer 8 engineering, a wood backing plate 7 is arranged at the bottom of the supporting belt 5 or the supporting beam 6;
4. the side form construction, the steel bar binding and the concrete pouring of the elevator foundation 1 are the same as the traditional construction method;
4. elevator installation
1) The concrete of the elevator foundation 1 reaches the design strength and the bottom template is removed;
2) According to the construction hoist installation instructions, professionals install the construction hoist.
Wherein:
the length and thickness of the elevator foundation 1 described in step 1 are determined according to the specifications of the elevator, and are determined according to the basic design drawing in the specifications of the selected elevator.
And step one, calculating the bearing capacity of the elevator foundation 1 by adopting a special-shaped plate module in the tool box software of the straightening structure, and checking whether the bearing capacity, deflection and cracks under the effect of the design value of the partial uniform load of the orthographic projection of the elevator lattice frame 4 meet the requirements.
And step one, the height of the edge sealing beam 10 is equal to the thickness of the elevator foundation 1, the width meets the requirement of the height-width ratio of 2-3.5, and the reinforcement meets the requirement that the reinforcement rate of the basic structure is more than or equal to 0.2%.
And step two, calculating the bearing capacity of the overhanging structure 2 by adopting PKPM structural design modules, respectively establishing vertical component and horizontal component models of three vertical and horizontal shaft nets within the range of the overhanging structure 2 on two sides, and checking whether the bearing capacity, deflection and crack of the frame beam 3 of the overhanging structure 2 on two sides meet the requirements under the action of all loads of the overhanging structure 2.
Step two, the design of the frame beam 3 of the cantilever structure 2 is compared with the checking and calculating reinforcement:
1) When the structural design reinforcement of the frame beam 3 of the overhanging structure 2 is larger than or equal to the structural checking reinforcement area and the deflection and the crack meet the requirements, judging that the frame beam 3 of the overhanging structure 2 meets the bearing capacity requirements;
2) When the frame beam 3 of the overhanging structure 2 does not meet the bearing capacity requirement, the frame beam 3 of the overhanging structure 2 is constructed according to the checking and calculating reinforcement area, so that the frame beam 3 of the overhanging structure 2 is ensured to meet the bearing capacity requirement under the load action of the lifter.
And step three, the supporting belt 5 is formed by pouring concrete with the thickness of 60 mm-100 mm and the strength grade of C25-C30 plain.
And step three, the support beam 6 is a reinforced concrete beam with the reinforcement ratio being more than or equal to 0.2% and the concrete strength grade being C25-C30.
And step three, extruding polystyrene board with thickness of 60-100 mm is adopted to block transmission of load of the elevator foundation 1 to the cantilever board by strain of the extruding polystyrene board, so that damage to the cantilever board is prevented.
The wood pad 7 in the step III is used for enlarging the contact area between the supporting belt 5 or the supporting beam 6 and the roof heat insulation waterproof layer 8 so that the bearing capacity of the roof heat insulation board meets the load requirement of the lifter. The thickness of the wood backing plate 7 is 100 mm-150 mm, the length is calculated as follows:
wherein, the length of the L-wood backing plate is m;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
F 2, a self-weight design value of the elevator foundation, wherein the unit is kN;
a 1, applying a self-weight design value of the lifter to the effective length of the frame beam, and taking 1m;
a, the basic length of the lifter is m;
The design value of the compressive strength of the sigma-extruded polystyrene board is given in kN/m2.

Claims (10)

1. The design and construction method for the installation construction lifter on the overhanging structure is characterized by comprising the following steps of:
1. Elevator foundation design
1. Determination of elevator base geometry
The frame beams of the cantilever structures at the two sides of the deformation joint extend 50 mm-100 mm to be the basic width of the lifter, and the length and the thickness of the frame beams are determined according to the specification of the lifter;
2. elevator and elevator base load calculation
2.1, The elevator height is calculated as h=h 1-h2+h3
Wherein, H is the height of the lifter, and the unit is m;
h 1, the elevation of the top of the building structure, and the unit is m;
h 2, the elevation of the foundation bottom of the lifter, and the unit is m;
h 3 is the height of the free end of the top of the lifter, and the unit is m;
2.2, the number of standard knots is n=H.l
Wherein n is the number of standard knots;
H is the height of the lifter, and the unit is m;
l-height of each standard section, unit is m;
2.3, the dead weight design value of the lifter is calculated according to the following formula F 1＝k1(P1+P2)+k2(P3+P4+P5
Wherein F 1 is the dead weight design value of the lifter, and the unit is kN;
k 1、k2, respectively taking 2 and 1.4 of the dynamic coefficient of the running load of the lifter;
p 1, the dead weight of the lifting cage of the lifter, and the unit is kN;
P 2 -the rated load of the elevator in kN;
p 3 -the weight of the elevator in kN;
P 4 -elevator standard section dead weight, elevator standard section dead weight = n x single standard section weight in kN;
p 5 -the dead weight of other parts of the lifter in kN;
2.4, calculating the design value of the uniformly distributed load of the elevator foundation according to the following formula:
wherein, the Q-elevator foundation is uniformly distributed with load design values in units of KN/m2;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
A is the bottom area of the lifter grid structure, and the unit is m2;
2.5, the self-weight design value of the elevator foundation is calculated by F 2＝k3 gamma abh
Wherein F 2 is the self-weight design value of the elevator foundation, and the unit is kN;
k 3, taking a dynamic coefficient of the running load of the lifter to be 1.2;
Gamma-reinforced concrete volume weight in KN/m 3;
a, the basic length of the lifter is m;
b-elevator base width in m;
h-the basic thickness of the lifter, wherein the unit is m;
3. Elevator base load calculation
4. Edge sealing beam arrangement for elevator foundation
A base edge sealing beam is arranged on two sides of the width direction of the elevator base in parallel;
2. Cantilever structure bearing capacity rechecking calculation
1. Frame beam line load calculation of overhanging structure
1.1, The line load of the frame beam of the cantilever structure acted by the self weight of the lifter is calculated according to the following formula:
wherein q 1 is the linear load of the self weight of the lifter on the frame beam, and the unit is KN/m;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
a 1, applying a self-weight design value of the lifter to the effective length of the frame beam, and taking 1m;
b-elevator base width in m;
1.2, the line load of the frame beam of the cantilever structure acted by the elevator foundation is calculated according to the following formula:
wherein q 2 is the linear load of the elevator foundation on the frame beam, and the unit is KN/m;
F 2, a self-weight design value of the elevator foundation, wherein the unit is kN;
a, the basic length of the lifter is m;
b-elevator base width in m;
2. calculation of bearing capacity of cantilever structure
3. The frame beam design of the overhanging structure is compared with the checking and calculating reinforcement bars;
3. elevator foundation construction
1. Positioning a central line and a side line according to a basic design plan of the construction elevator;
2. Elevator foundation bottom formwork support arrangement
2.1 When the cantilever structures at the two sides of the deformation joint have height differences
1) A supporting belt is arranged on the frame beam on the higher side of the elevator foundation in a flat mode, and a supporting beam is arranged on the frame beam on the lower side of the elevator foundation in a flat mode, so that the supporting belt is flush with the top of the supporting beam;
2) The construction method of the lower side support beam template and the elevator foundation bottom template is the same as the traditional technology;
2.2, when the elevation of overhanging structures at two sides of the deformation joint is the same
1) Support belts with the same height are arranged on frame beams on two sides of the elevator foundation in a flat mode;
2) Before the elevator foundation bottom die plate is installed, fully paving the extruded polystyrene board, and then installing an elevator foundation bottom die;
3. When the elevator foundation is installed on a roof which has completed heat preservation and waterproof layer engineering, a wood backing plate is arranged at the bottom of a supporting belt or a supporting beam;
4. the side form construction, the steel bar binding and the concrete pouring of the foundation of the elevator are the same as the traditional construction method;
4. elevator installation
1) The elevator foundation concrete reaches the design strength and the bottom template is removed;
2) Installing the construction hoist by a professional according to the construction hoist installation instruction.
2. The method of designing and constructing an elevator for installation on a cantilever structure according to claim 1, wherein the step 1 is a step 1 in which the base length and thickness of the elevator are determined according to the specification of the elevator, and the step 1 is a step of determining the base design according to the specification of the selected elevator.
3. The method for designing and constructing the construction elevator installed on the overhanging structure according to claim 1, wherein the step one, the serial number 3, is that the elevator foundation bearing capacity is calculated by adopting a special-shaped plate module in the tool box software of the straightening structure, and whether the bearing capacity, deflection and crack under the effect of the design value of the orthographic projection local uniform load of the elevator lattice structure meet the requirements is checked.
4. The method for designing and constructing the construction elevator on the cantilever structure according to claim 1, wherein the step one is that the edge sealing beam with the sequence number 4 has the height equal to the thickness of the elevator foundation, the width meets the requirement of the height-width ratio of 2-3.5, and the reinforcement meets the requirement that the reinforcement rate of the basic structure is more than or equal to 0.2%.
5. The method for designing and constructing the construction lifter on the overhanging structure according to claim 1, wherein the step two is characterized in that the step 2 is used for calculating the bearing capacity of the overhanging structure, namely a PKPM structural design module is adopted, vertical component and horizontal component models of three vertical and horizontal shaft nets in the range of the overhanging structure at two sides are respectively established, and whether the bearing capacity, deflection and crack of a frame beam of the overhanging structure at two sides meet the requirements or not is checked under the action of all loads of the overhanging structure.
6. The method for designing and constructing the installation construction elevator on the overhanging structure according to claim 1, wherein the step two is that the frame beam of the overhanging structure is designed and compared with the checking and calculating reinforcement:
1) When the structural design reinforcement of the frame beam of the overhanging structure is larger than or equal to the structural checking reinforcement area and the deflection and the cracks meet the requirements, judging that the frame beam of the overhanging structure meets the bearing capacity requirements;
2) When the frame beam of the overhanging structure does not meet the bearing capacity requirement, the frame beam of the overhanging structure is constructed according to the checking and calculating reinforcement area, so that the frame beam of the overhanging structure is ensured to meet the bearing capacity requirement under the load action of the lifter.
7. The method for designing and constructing the mounting construction lifter on the cantilever structure according to claim 1, wherein the supporting belt with the third serial number 2 is formed by casting concrete with the thickness of 60 mm-100 mm and the strength grade of C25-C30.
8. The method for designing and constructing the construction lifter on the overhanging structure according to claim 1, characterized in that the supporting beam with the third serial number 2 is a reinforced concrete beam with the reinforcement ratio more than or equal to 0.2% and the concrete strength grade of C25-C30.
9. The method for designing and constructing the lifting machine for installing construction on the cantilever structure according to claim 1, wherein the extruded polystyrene board with the sequence number 2 is used for preventing the damage of the cantilever board by blocking the transmission of the basic load of the lifting machine to the cantilever board by adopting the strain of the extruded polystyrene board with the thickness of 60 mm-100 mm.
10. The method for designing and constructing the construction elevator installed on the overhanging structure according to claim 1, characterized in that step three, the wooden base plate with the number 3 is used for enlarging the contact area between the supporting belt or the supporting beam and the roof heat insulation waterproof layer, so that the bearing capacity of the roof heat insulation board meets the load requirement of the elevator, the thickness of the wooden base plate is 100 mm-150 mm, and the length is calculated according to the following formula:
wherein, the length of the L-wood backing plate is m;
F 1, the dead weight design value of the lifter, wherein the unit is kN;
F 2, a self-weight design value of the elevator foundation, wherein the unit is kN;
a 1, applying a self-weight design value of the lifter to the effective length of the frame beam, and taking 1m;
a, the basic length of the lifter is m;
The design value of the compressive strength of the sigma-extruded polystyrene board is given in kN/m2.
CN202311558805.3A 2023-11-21 2023-11-21 Design and construction method of installing construction hoist on cantilever structure Active CN117668972B (en)

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CN110984602A (en) * 2019-12-23 2020-04-10 山东开拓建设有限公司 Design and construction method of assembly type interlayer protection device of construction elevator

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JP5627084B2 (en) * 2010-08-03 2014-11-19 鹿島建設株式会社 Block-type dismantling method for multi-layer buildings
CN202247942U (en) * 2011-01-07 2012-05-30 中国建筑第四工程局有限公司 Overhanging type elevator foundation
CN112069586B (en) * 2020-09-17 2024-03-19 山东金城建设有限公司 Design and construction method for installing section steel cantilever scaffold on cantilever structure
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CN107818223A (en) * 2017-11-02 2018-03-20 山东万鑫建设有限公司 Lift checking of bearing capacity and construction method are installed on underground garage roof system
CN110984602A (en) * 2019-12-23 2020-04-10 山东开拓建设有限公司 Design and construction method of assembly type interlayer protection device of construction elevator

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