CN211769949U - Movable arm type tower crane underframe ballast type foundation - Google Patents
Movable arm type tower crane underframe ballast type foundation Download PDFInfo
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- CN211769949U CN211769949U CN202020247159.4U CN202020247159U CN211769949U CN 211769949 U CN211769949 U CN 211769949U CN 202020247159 U CN202020247159 U CN 202020247159U CN 211769949 U CN211769949 U CN 211769949U
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Abstract
The utility model relates to a movable arm formula tower crane chassis weighs formula basis locates the basement top, include: the cross steel beam is used for mounting a tower crane underframe; the tower crane support is arranged below the cross-shaped steel beam in a cushioning mode and comprises a reinforced concrete beam for placing the cross-shaped steel beam and a support column for supporting the reinforced concrete beam; the support column is a frame column supported at the crossing position of a transverse frame beam and a longitudinal frame beam of the basement, and the frame column extends out of the ground elevation and is fixed at the bottom of the reinforced concrete beam; and a plurality of concrete column piers used for fixing the reinforced concrete beam to a top plate of the basement are fixed at the bottom of the reinforced concrete beam at intervals. The utility model utilizes the basement structure to fix and support the tower crane support, and simultaneously replaces the traditional concrete bearing platform into the form of reinforced concrete beam, thereby saving raw materials and reducing construction waste on the premise of not reducing the bearing capacity of the tower crane foundation; the cross steel beam is placed on the tower crane support and then the tower crane is fixed, so that the disassembly and the assembly are more convenient and quicker, and the tower crane support is suitable for installation of different tower cranes.
Description
Technical Field
The utility model belongs to the technical field of swing arm formula tower crane foundation construction, concretely relates to swing arm formula tower crane chassis ballast formula basis.
Background
With the progress of society, the development of economy and the increase of urban building density, large steel structure buildings are increasing day by day, the requirements of people on the environment are higher and higher, the government starts to make rules to prohibit the crane jib from exceeding the safety range to reach or span the air space of a neighbor, and under the limit, a trolley amplitude-variable tower crane cannot be used in many building sites, and the movable arm type tower crane is widely applied to high-rise buildings and large steel structure installation with relatively short turning radius, large lifting height and large lifting capacity.
For the safety of guaranteeing the tower crane in the use, set up the tower crane basis in the tower crane bottom usually, and traditional tower crane basis is simple cuboid concrete foundation, and the tower crane is fixed in on the concrete foundation. However, the tower crane foundation is large in size, needs more concrete and steel bars to be manufactured, is high in cost, needs long time for concrete maintenance, and is long in construction period, in addition, in order to meet the bearing requirement of the tower crane foundation, excavation is often needed, steel lattice columns are buried in drilled holes, after construction is finished, the tower crane foundation is quite troublesome to detach, a large amount of manpower and material resources are needed to be consumed, a large amount of building waste is generated, and the environment is polluted.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model develops a movable arm type tower crane underframe ballast type foundation which is arranged above a basement, utilizes the basement structure to fix and support a tower crane support, and simultaneously replaces the traditional concrete bearing platform into a reinforced concrete beam, thereby saving the raw materials such as concrete and steel bars, reducing the generation of construction waste and shortening the construction period on the premise of not reducing the bearing capacity of the tower crane foundation; in addition, the mode of placing the cross steel beam on the tower crane support is adopted, so that the tower crane is more convenient and rapid to disassemble and assemble, and is suitable for installation of tower cranes of various models.
The utility model discloses a following technical scheme realizes: the utility model provides a basement top is located to swing arm formula tower crane chassis ballast formula basis, includes:
the cross steel beam is used for mounting a tower crane underframe;
the tower crane support is arranged below the cross-shaped steel beam in a cushioning mode and comprises a reinforced concrete beam used for placing the cross-shaped steel beam and a support column used for supporting the reinforced concrete beam; the support column is a frame column supported at the crossing position of a transverse frame beam and a longitudinal frame beam of the basement, and the frame column extends out of the ground elevation and is fixed at the bottom of the reinforced concrete beam; and a plurality of concrete column piers used for fixing the reinforced concrete beam to a top plate of the basement are fixed at the bottom of the reinforced concrete beam at intervals.
The utility model discloses moving arm formula tower crane chassis weighs further improvement of formula basis lies in, the reinforced concrete roof beam includes two reinforced concrete girders that set up relatively and is fixed in two reinforced concrete secondary beam between the reinforced concrete girder, two tip and four of reinforced concrete girder the support column one-to-one, the cross girder steel is placed in two the middle part of reinforced concrete secondary beam, just four tip of cross girder steel all correspond concrete column mound.
The utility model discloses moving arm formula tower crane chassis weighs further improvement on formula basis lies in, the frame post extends ground elevation 0.1 ~ 1.0 m.
The utility model discloses the further improvement on swing arm formula tower crane chassis ballast formula basis lies in, correspond to on the reinforced concrete roof beam the position department of four mops of cross girder steel is equipped with the backing plate.
The utility model discloses moving arm formula tower crane chassis weighs further improvement of formula basis lies in, the reinforced concrete roof beam is assembled by the precast beam and is formed, it is used for with to reserve on the assigned position of precast beam the support column with the fixed reinforcing bar of concrete column mound.
The utility model discloses moving arm formula tower crane chassis weighs further improvement on formula basis lies in, the cross-sectional area of the optional position department of reinforced concrete roof beam is the same.
The utility model discloses a swing arm formula tower crane chassis weighs formula basis and construction method includes but is not limited to following beneficial effect:
1. by utilizing the basement structure to fix and support the tower crane support and replacing the traditional concrete bearing platform with a reinforced concrete beam, raw materials such as concrete and steel bars are saved, the generation of construction waste is reduced on the premise of not reducing the bearing capacity of the tower crane foundation, longer concrete curing time is not needed, and the construction period is shortened;
2. by the mode of placing the cross-shaped steel beam on the tower crane support and then installing the tower crane underframe on the cross-shaped steel beam, the arrangement of a construction joint at the joint of the tower crane foundation and the basement top plate is avoided, the waterproof effect of the basement top plate is ensured, the tower crane is more convenient and rapid to disassemble and assemble, and the tower crane foundation is suitable for the installation of tower cranes of various models;
3. adopt precast beam form concatenation reinforced concrete beam, make the concatenation of reinforced concrete beam convenient more quick, and need not to wait for the concrete maintenance of reinforced concrete beam, further shortened construction period.
Drawings
FIG. 1 is a schematic view of an elevation of a bottom-frame ballasted foundation of a swing-arm tower crane according to an embodiment of the present invention;
FIG. 2 is a schematic plan view of a movable arm type tower crane underframe ballast type foundation in the embodiment of the present invention;
fig. 3 is a schematic plan view of a cross-shaped steel beam in the embodiment of the present invention when the crane boom is located in two directions;
figure 4 is the cross section sketch map of reinforced concrete beam in the embodiment of the utility model.
Detailed Description
Traditional tower crane basis is simple cuboid concrete foundation, and the tower crane is fixed in on the concrete foundation. However, the tower crane foundation is large in size, needs more concrete and steel bars to be manufactured, is high in cost, needs long time for concrete maintenance, and is long in construction period, in addition, in order to meet the bearing requirement of the tower crane foundation, excavation is often needed, steel lattice columns are buried in drilled holes, after construction is finished, the tower crane foundation is quite troublesome to detach, a large amount of manpower and material resources are needed to be consumed, a large amount of building waste is generated, and the environment is polluted. The utility model discloses a swing arm formula tower crane chassis weighs formula basis is put on locating the basement, utilizes the basement structure to fix and support the tower crane support, replaces traditional concrete cushion cap into the form of reinforced concrete roof beam simultaneously, under the prerequisite that does not reduce the bearing capacity of tower crane basis, has practiced thrift raw and other materials such as concrete and reinforcing bar, has reduced the production of building rubbish, has shortened construction period; in addition, the mode of placing the cross steel beam on the tower crane support is adopted, so that the tower crane is more convenient and rapid to disassemble and assemble, and is suitable for installation of tower cranes of various models.
The movable arm type tower crane underframe ballast type foundation of the present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 and 2, a movable arm type tower crane underframe ballast type foundation includes:
the cross steel beam 10 is used for mounting the tower crane underframe 50; the tower crane support is arranged below the cross-shaped steel beam 10 in a cushioning mode, and comprises a reinforced concrete beam 30 for placing the cross-shaped steel beam 10 and a support pillar 40 for supporting the reinforced concrete beam 30; the support column 40 is a frame column supported at the crossing position of the transverse frame beam and the longitudinal frame beam of the basement, and the frame column is fixed at the bottom of the reinforced concrete beam 30 after extending out of the ground elevation; a plurality of concrete piers 20 for fixing the reinforced concrete beam 30 to the ceiling of the basement are fixed to the bottom of the reinforced concrete beam 30 at intervals.
In this embodiment, the reinforced-concrete beam 30 includes two main reinforced-concrete beams 31 disposed oppositely and two secondary reinforced-concrete beams 32 fixed between the two main reinforced-concrete beams 31, two ends of the two main reinforced-concrete beams 31 are fixed to the four support pillars one by one, the cross-shaped steel beam 10 is placed in the middle of the two secondary reinforced-concrete beams 32, and the four ends of the cross-shaped steel beam 10 are corresponding to the concrete piers 20.
In order to save material cost on the premise of not influencing the bearing capacity of the tower crane foundation, in the embodiment, preferably, two ends of one of the reinforced concrete secondary beams 32 are respectively fixed at two end parts of the two reinforced concrete main beams 31, two ends of the other reinforced concrete secondary beam 32 are respectively fixed at the middle parts of the two reinforced concrete main beams 31, the two reinforced concrete secondary beams 32 are parallel to each other, the distance is matched with the bottom size of the cross-shaped steel beam 10, the tower crane underframe 50 is fixedly arranged on the two cross-shaped beams of the cross-shaped steel beam 10, and the cross point of the cross-shaped steel beam 10 is located at the central point of the tower crane underframe 50, so that the tower crane foundation is stressed evenly.
Preferably, the frame column 40 extends out of the elevation of the ground A and forms an extension section 41 with a length of 0.1-1.0 m above the ground A.
In the present embodiment, the length of the extension 41 is +0.860 m.
Preferably, the reinforced concrete beam 30 is provided with backing plates at positions corresponding to the four ends of the cross-shaped steel beam 10, and through the arrangement of the backing plates, the local pressure of the tower crane underframe 50 on the tower crane foundation is dispersed, and the abrasion of the fulcrum of the cross-shaped steel beam 10 on the reinforced concrete beam 30 is prevented.
Preferably, the reinforced concrete girder 30 is assembled by precast girders, and reinforcing bars for fixing with the support columns 40 and the concrete piers 20 are reserved at designated positions of the precast girders.
In this embodiment, the cross-sectional area of the reinforced concrete beam 30 at any position is the same, that is, the precast beam is a reinforced concrete beam with standard cross-sectional dimension, the length of each precast beam is set according to the dimension and shape of the actual reinforced concrete beam 30, and the adjacent precast beams are assembled and fixed by the support columns 40 or the concrete piers 20.
The utility model also provides a construction method of swing arm formula tower crane chassis ballast formula basis, it is shown with reference to fig. 1 and fig. 2, include following step:
s1, before basement construction, determining the size and shape of the reinforced concrete beam 30 and the number and position of the concrete piers 20 according to a tower crane foundation load algorithm, and verifying the bearing capacity of the tower crane support according to various working conditions;
s2, constructing the concrete pier 20, and extending the top end of the frame column serving as the support column 40 to a ground elevation A during basement construction; binding concrete column pier reinforcing steel bars while binding the basement top plate reinforcing steel bars, so that the concrete column pier reinforcing steel bars and the support column reinforcing steel bars are bound and fixed with the basement top plate reinforcing steel bars; simultaneously pouring a basement top plate, an extension section 41 of the support pillar 40 and the concrete pier 20, and reserving reinforcing steel bars for fixing the reinforced concrete beam 30 at the top of the extension section 41 and the top of the concrete pier 20;
s3, constructing the reinforced concrete beam 30 according to the size and shape of the reinforced concrete beam 30, and correspondingly fixing the reinforced concrete beam 30 with the support pillar 40 and the concrete pier 20; then concrete is poured at the fixed positions of the reinforced concrete beam 30, the support columns 40 and the concrete piers 20 to complete the tower crane support;
s4, after the tower crane support is completed, the cross steel beam 10 is placed at the designated position of the reinforced concrete beam 30, and the cross steel beam 10 is leveled.
Specifically, the utility model discloses use JCD260 tower crane as an example to simply explain tower crane foundation load algorithm:
description of the case of a Tower crane: when the height of the ballast type tower body is 38.22 meters (9 standard knots), the maximum vertical force of the tower crane building is 124 t; after subsequent attachment, the stress is smaller than the load at the independent height, so the stress after attachment is not considered; the weight Fg is 848KN, the self-weight Fv is 1169KN, the bending moment M is 5262KN.m, the horizontal force Fh is 170KN, and the width b of the underframe is 6M.
Referring to fig. 3, A, B, C, D are the four ends of the cross steel beam 10, RA, RB, RC, and RD are the load forces acting on the four ends of the cross steel beam as fulcrums, Q1 is the first direction of the boom, and Q2 is the second direction of the boom.
A, B, C, D load force R when the boom is in the first direction Q1A、RB、RC、RDThe calculation formula of (2) is as follows:
the formula (1) is a four-pivot algorithm, the formula (2) is a three-pivot algorithm, and when a negative value occurs in the four-pivot algorithm, recalculation is performed according to the three-pivot algorithm;
loading force R at A, B, C, D with boom in second direction Q2A、RB、RC、RDThe calculation method comprises the following steps:
the loading force at A, B, C, D when the boom is in the first direction Q1 and the second direction Q2 respectively is calculated by adopting the algorithm, which is as follows:
| A | B | C | D | |
| first direction Q1 | 388.4kN | 1240.3kN | 388.4kN | 0 |
| Second direction Q2 | 65.8kN | 942.8kN | 942.8kN | 65.8kN |
After the above results are obtained, the size and shape of the reinforced-concrete beam 30 and the number and position of the concrete piers 20 are determined, as shown in fig. 2 to 4, the reinforced-concrete beam 30 of the present embodiment includes two main reinforced-concrete beams 31 disposed oppositely and two secondary reinforced-concrete beams 32 fixed between the two main reinforced-concrete beams 31, two ends of the two main reinforced-concrete beams 31 are fixed with four supporting columns 40 one by one, the cross-sectional areas of the main reinforced-concrete beams 31 and the secondary reinforced-concrete beams 32 are both 600 × 1000mm, the shapes are similar to open-character shapes, 8 concrete piers are disposed on the two secondary reinforced-concrete beams 32 at intervals and oppositely, and form the a-m fulcrums shown in fig. 2 together with the four supporting columns 40, in this embodiment, the A, B, C, D ends of the cross-shaped steel beam 10 correspond to the f-th, h, k, and m fulcrums;
the bearing capacity of the tower crane support is verified by adopting midas gen software, specifically, the bearing capacity of the tower crane support is verified respectively according to 8 working conditions, the 8 working conditions are that four loading forces in a first direction Q1 are applied to any point of f, h, k and m and four loading forces in a second direction Q2 are applied to any point of f, h, k and m, the conditions of internal force, deformation and fulcrum counter force of the tower crane base are simulated, and whether the bearing capacity of the tower crane support meets requirements is verified.
In step S3, two methods of constructing the reinforced concrete girder 30 are involved:
one is that the reinforced concrete beam 30 is cast in place, namely, firstly, the reinforced concrete beam steel bars are bound according to the size and the shape of the reinforced concrete beam 30, and the reinforced concrete beam steel bars are bound and fixed with the reserved steel bars of the support pillar 40 and the concrete pier 20; after the steel bars of the reinforced concrete beam are completely bound, the reinforced concrete beam 30 is simultaneously poured at the fixed positions of the reinforced concrete beam 30, the support columns 40 and the concrete column piers 20, so that the integral pouring of the tower crane support is completed;
the other is that the reinforced concrete beam 30 is formed by splicing precast beams, and lap-jointed steel bars for fixing with the steel bars reserved for the support column 40 or the concrete pier 20 are reserved at the appointed position (namely, the fixed position with the support column 40 or the concrete pier) of the precast beam; when the reinforced concrete beam 30 is constructed, the precast beams are hoisted to the site, the lap-jointed steel bars of each precast beam are correspondingly bound and fixed with the steel bars reserved in the support columns 40 or the concrete piers 20 according to the preset shape of the reinforced concrete beam, and then concrete is directly poured at the fixed positions of the reinforced concrete beam, each support column and each concrete pier, so that the integral pouring of the tower crane support is completed.
When the concrete of the basement roof is poured, layered pouring is needed, the pouring height of each layer should not exceed 1000mm, the pouring of the concrete of the previous layer must be carried out before the initial setting of the concrete of the next layer, the concrete pouring adopts a vibrating rod to carry out vibration compaction, vibration leakage and over vibration cannot exist, and the concrete surface layer must be leveled; after the concrete is poured and formed, the concrete must be maintained within 12 hours, and the maintenance time is 14 days. And then, earth backfilling is carried out on the area surrounded by the reinforced concrete beam 30, and the backfilling needs to be carried out in a layered mode so as to meet the standard requirement and further improve the bearing capacity of the tower crane support.
Preferably, after the number and positions of the concrete piers 20 are determined, the basement structure is designed, so that structural columns (frame columns can be steel pipe columns) are arranged in the positions corresponding to the concrete piers 20 in the basement, and the structural columns extend out of the ground elevation (the extension height is consistent with that of the support columns 40, so as to ensure that the reinforced concrete beam 30 is kept horizontal); when the basement top plate steel bars are bound, fixing the structural column steel bars and the basement top plate steel bars; when the top slab of the basement is poured, the top of the structural columns are poured together to form concrete piers 20. By the arrangement of the structural columns, the support capacity of the concrete pier 20 can be improved.
Adopt the utility model discloses a swing arm formula tower crane chassis weighs formula basis only needs to place cross girder steel 10 on the tower crane support, install tower crane chassis 50 on cross girder steel 10 again, save raw and other materials such as concrete, reinforcing bar, compare in independent tower crane basis, tower crane basis excavation has been removed from, the bed course is pour, a series of processes such as reinforcement, the dismouting of tower crane is more convenient, quick, construction cycle has been shortened, it is artifical to save, avoided setting up the construction joint in tower crane basis and basement roof junction simultaneously, guarantee the water-proof effects of basement roof. The utility model discloses a swing arm formula tower crane chassis ballast formula basis can have enough to meet the need the use, is applicable to the swing arm formula tower crane of different models, when changing different swing arm formula tower cranes, only needs to install the tower crane chassis on the different radius positions of cross girder steel to according to the actual conditions calculation of the swing arm formula tower crane that uses and place the counter weight can.
The present invention has been described in detail with reference to the embodiments shown in the drawings, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.
Claims (6)
1. The utility model provides a base of crane tower underframe ballast formula of swing arm formula locates the basement top, a serial communication port, includes:
the cross steel beam is used for mounting a tower crane underframe;
the tower crane support is arranged below the cross-shaped steel beam in a cushioning mode and comprises a reinforced concrete beam used for placing the cross-shaped steel beam and a support column used for supporting the reinforced concrete beam; the support column is a frame column supported at the crossing position of a transverse frame beam and a longitudinal frame beam of the basement, and the frame column extends out of the ground elevation and is fixed at the bottom of the reinforced concrete beam; and a plurality of concrete column piers used for fixing the reinforced concrete beam to a top plate of the basement are fixed at the bottom of the reinforced concrete beam at intervals.
2. The tower crane underframe ballast type foundation of claim 1, wherein the reinforced-concrete beam comprises two main reinforced-concrete beams disposed opposite to each other and two secondary reinforced-concrete beams fixed between the two main reinforced-concrete beams, two ends of the two main reinforced-concrete beams are fixed to the four support pillars one by one, the cross-shaped steel beam is placed in the middle of the two secondary reinforced-concrete beams, and the concrete piers are corresponding to the four ends of the cross-shaped steel beam.
3. The tower crane underframe ballast foundation of claim 1, wherein the frame column extends to a ground level of 0.1-1.0 m.
4. The tower crane underframe ballast foundation of claim 1, wherein the reinforced concrete beam is provided with backing plates at positions corresponding to four ends of the cross-shaped steel beam.
5. The tower crane underframe ballast type foundation of claim 1, wherein the reinforced concrete beam is assembled by precast beams, and the specified position of the precast beam is reserved with reinforcing steel bars for fixing with the support columns and the concrete column piers.
6. The tower crane underframe ballast foundation of claim 5, wherein the cross-sectional area of the reinforced concrete beam at any position is the same.
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| CN202020247159.4U CN211769949U (en) | 2020-03-03 | 2020-03-03 | Movable arm type tower crane underframe ballast type foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562129A (en) * | 2022-04-06 | 2022-05-31 | 中建八局第四建设有限公司 | Trinity reinforcing method for basement roof on crawler crane |
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2020
- 2020-03-03 CN CN202020247159.4U patent/CN211769949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562129A (en) * | 2022-04-06 | 2022-05-31 | 中建八局第四建设有限公司 | Trinity reinforcing method for basement roof on crawler crane |
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