CN112030996B - A construction platform for foundation ditch crown beam upper portion - Google Patents

A construction platform for foundation ditch crown beam upper portion Download PDF

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Publication number
CN112030996B
CN112030996B CN202010939884.2A CN202010939884A CN112030996B CN 112030996 B CN112030996 B CN 112030996B CN 202010939884 A CN202010939884 A CN 202010939884A CN 112030996 B CN112030996 B CN 112030996B
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China
Prior art keywords
supporting
platform
crown
platform base
transverse
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CN112030996A (en
Inventor
李军心
祝国梁
王金兵
曾平
陈国宝
蔡玉长生
王成龙
陈明法
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China Construction Fourth Engineering Division Corp Ltd
China Construction Fourth Engineering Bureau Construction and Development Co Ltd
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China Construction Fourth Engineering Division Corp Ltd
China Construction Fourth Engineering Bureau Construction and Development Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The invention relates to a construction platform for the upper part of a foundation pit crown beam, which comprises a platform mechanism, a fixed supporting mechanism and a guide supporting mechanism, wherein a limiting groove with an inverted L-shaped cross section is arranged below a platform base, and communication holes communicated to the limiting groove are formed in the bottom surface of the platform base at equal intervals; the fixed supporting mechanism comprises a plurality of supporting rods which are pre-buried on the foundation pit crown beam at equal intervals, and the upper parts of the supporting rods are outwards turned and arranged in an inverted L shape; the guide supporting mechanism comprises at least two transverse supporting beams, the bottom of each transverse supporting beam is supported and mounted on a supporting rod, and the top of each transverse supporting beam is provided with a corresponding supporting steel ball in a rolling manner; the communicating holes on the platform base penetrate through the turning parts of the supporting rods and then move to the positions where the transverse supporting beams are installed in a supporting mode to install the platform base. The invention can effectively and quickly carry out forming installation and put into use on the premise of ensuring the stability of the construction platform, and has low cost.

Description

A construction platform for foundation ditch crown beam upper portion
Technical Field
The invention relates to a construction platform, in particular to a construction platform for the upper part of a foundation pit crown beam.
Background
The foundation pit is a soil pit excavated at a foundation design position according to the base elevation and the base plane size, in order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit, the side wall and the surrounding environment of the foundation pit need to be supported, blocked, reinforced and protected by corresponding foundation pit support, and most of the existing foundation pit support adopts reinforced concrete piles to carry out pile arrangement support.
Because the cost of reinforced concrete pile is high, consequently satisfying the back of strutting the requirement, reinforced concrete pile's whole length generally can be restricted, and the peak of current reinforced concrete pile generally is located one meter below the ground. Therefore, the supporting cost can be effectively reduced on the premise of supporting, but the height difference between the reinforced concrete pile and the ground can bring inconvenient influence on subsequent construction operation. In order to facilitate construction, a corresponding foundation pit crown beam is poured at the top of the existing reinforced concrete pile, a corresponding support is generally erected on the existing foundation pit crown beam in order to adapt to the height difference between the foundation pit crown beam and the ground, then a steel plate platform is laid on the support, so that a construction platform which is connected to the ground is effectively formed on the upper portion of the foundation pit crown beam, and convenience is brought to construction of personnel.
In order to ensure the stability of the construction platform, the structure of the support for supporting the existing steel plate platform is generally complex, so that the integral erection construction difficulty of the support and the construction platform is high, the construction efficiency is low, a whole circle of support erection needs to be carried out on the foundation pit crown beam, and a whole circle of steel plate platform erection needs to be carried out, the material consumption is high, and the construction cost of the platform is relatively high.
Therefore, on the premise of ensuring the stability of the construction platform, the invention aims to develop a construction platform which can be effectively and quickly formed and installed and put into use and is used for the upper part of the foundation pit crown beam with low cost.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a construction platform for the upper part of a foundation pit crown beam, which can effectively solve the technical problems in the prior art.
The technical scheme of the invention is as follows:
a construction platform for the upper part of a crown beam of a foundation pit comprises a platform mechanism, a fixed supporting mechanism and a guide supporting mechanism,
the platform mechanism comprises a platform base and a platform plate fixedly connected to the upper end of the platform base, a limiting groove with an inverted L-shaped cross section is arranged below the platform base, and communication holes communicated to the limiting groove are formed in the bottom surface of the platform base at equal intervals;
the fixed supporting mechanism comprises a plurality of supporting rods which are pre-buried on the foundation pit crown beam at equal intervals, the upper parts of the supporting rods are outwards turned and arranged in an inverted L shape, and the interval between every two adjacent supporting rods is consistent with the interval between every two adjacent communicating holes;
the guide supporting mechanism comprises at least two transverse supporting beams, the bottoms of the transverse supporting beams are supported and mounted on a plurality of corresponding supporting rods, a plurality of corresponding accommodating holes are formed in the tops of the transverse supporting beams, and corresponding supporting steel balls are respectively mounted in the accommodating holes in a rolling manner;
the distance between the upper end face of the supporting steel ball and the lower end face of the folded part of the supporting rod is L1, the height of the upper part of the groove body of the limiting groove is L2, the distance between the top face of the transverse supporting beam and the lower end face of the folded part of the supporting rod is L3, the diameter of the supporting steel ball is D, L1 is more than L2, and L2-L3 is more than D;
the communicating hole on the platform base moves to the position where the transverse supporting beam is supported and installed after penetrating through the folding part of the supporting rod, so that the platform base is installed, and the top surface of the limiting groove of the platform base is supported and installed at the top end part of the supporting steel ball;
the rear end of the platform plate is fixedly connected with a corresponding traction ring, two sides of the platform base respectively extend to the peripheries of two sides of the platform plate, and two sides of the platform base are respectively fixedly connected with a corresponding lifting lug;
the diameter D of the supporting steel balls is not less than 15mm, the supporting steel balls are arranged in a rectangular array, and the distance between every two adjacent supporting steel balls is not more than 25 mm.
The rear side bottom support of the platform plate is arranged on the ground on the periphery of the foundation pit crown beam, at least one corresponding fixing hole is formed in the rear side of the platform plate, and a fixing shaft with a pointed bottom is respectively embedded between the fixing hole and the ground on the periphery of the foundation pit crown beam in a positioning mode.
The bottom of the transverse supporting beam is fixedly connected with a plurality of corresponding clamping grooves at equal intervals respectively, and the clamping grooves are clamped on the folding parts of the corresponding supporting rods respectively.
The bottom of the transverse supporting beam is fixedly connected with a plurality of corresponding reinforcing ribs respectively, and two ends of each reinforcing rib are fixedly connected to corresponding clamping grooves respectively.
The front side of the platform board is provided with a plurality of locking threaded holes for installing the guard rails.
The upper end of platform base upwards is provided with a plurality of corresponding spliced poles according to equidistant integration shaping, the front side bottom of landing slab is respectively through welding mode rigid coupling to on the spliced pole.
The invention has the advantages that:
1) the platform mechanism comprises a platform base and a platform plate fixedly connected to the upper end of the platform base, wherein a limiting groove with an inverted L-shaped cross section is arranged below the platform base, and communication holes communicated with the limiting groove are formed in the bottom surface of the platform base at equal intervals. When the platform base is installed, the platform base can be directly hoisted to the upper parts of the supporting rods of the fixed supporting mechanism, then the position of the platform base is adjusted to enable the communicating holes to be respectively aligned and clamped into the corresponding supporting rods, the supporting rods are respectively clamped into the limiting grooves of the platform base, and the platform base can move back and forth between the supporting rods; then hoisting the transverse supporting beam to one side of the platform base, mounting the bottom support of the transverse supporting beam on the corresponding supporting rod, and moving the platform base towards the direction provided with the transverse supporting beam to enable the top surface of the limiting groove of the platform base to support the top end part of the supporting steel ball mounted on the transverse supporting beam; then the fixing shaft with the pointed bottom is driven into the fixing hole of the platform plate, and the platform mechanism can be positioned and installed. Compared with the conventional integral support mounting and integral steel plate platform building, the time required by the whole forming and mounting process is shortened by at least 95%, the labor and cost consumption in the platform mechanism building process is greatly reduced, and the construction efficiency is greatly improved.
2) The supporting stress of the platform mechanism is provided by the cooperation of the transverse supporting beam and the plurality of supporting rods, the supporting stability is sufficient, and under the action of the transverse supporting beam, the supporting stress is effectively dispersed to each supporting rod, so that the supporting stability is effectively further ensured; the limiting position of the platform mechanism is provided by the fixing shaft, the fixing shaft only needs to provide limiting position, supporting force does not need to be provided, and therefore the stability of the platform mechanism can be effectively guaranteed, and the overall stability of the platform mechanism is effectively guaranteed.
3) When the position of platform mechanism needs to be adjusted, only need to hoist another transverse supporting beam to one side of platform base, then the removal and the location action of repeated above-mentioned platform base can accomplish the position adjustment to platform mechanism, whole adjustment process is very convenient, a platform mechanism just can effectively adapt to the user demand of the different positions of whole foundation ditch crown beam, platform mechanism's whole consumptive material has greatly been reduced, whole consumptive material reduces more than 95% at least, platform mechanism's use cost reduces more than 95% at least.
4) The distance between the upper end surface of the supporting steel ball and the lower end surface of the folding part of the supporting rod is L1, the height of the upper part of the groove body of the limiting groove is L2, the distance between the top surface of the transverse supporting beam and the lower end surface of the folding part of the supporting rod is L3, the diameter of the supporting steel ball is D, L1 is less than L2, and L2-L3 is less than D. Thereby effectively ensuring that the platform base can smoothly move between the supporting rod and the supporting steel ball, effectively ensuring the stability in the moving process and preventing the steel ball from deviating.
5) The middle position of the platform plate is provided with a corresponding traction hole, two sides of the platform base respectively extend to the peripheries of two sides of the platform plate, and two sides of the platform base are respectively fixedly connected with a corresponding lifting lug. The platform mechanism can be effectively hoisted and moved by the arrangement of the lifting lugs and the cooperation of external hoisting equipment, and can be effectively matched with an external traction rope by the arrangement of the traction holes, and the movement stability of the platform mechanism in the moving process can be effectively adjusted by controlling the traction rope by constructors, so that the moving operation convenience degree of the platform mechanism is effectively improved.
6) If the diameter of the supporting steel ball is too small, the bearing capacity of the supporting steel ball is insufficient, so that the problem of deformation of the supporting steel ball is easily caused, and the movement and the support of the platform mechanism are further influenced; if the diameter of the supporting steel balls is too large, the distance between the supporting steel balls is too large, and on the premise that the supporting surface is limited, the distance between the supporting points of the supporting steel balls is too large, so that the supporting of the platform mechanism by the plurality of supporting steel balls cannot meet the design requirement. Therefore, the diameter D of the supporting steel balls is set to be not less than 15mm, the supporting steel balls are arranged in a rectangular array, and the distance between every two adjacent supporting steel balls is controlled to be not more than 25mm, so that the supporting effect of the supporting steel balls on the platform mechanism is improved to the maximum extent and the smooth moving degree of the platform mechanism is ensured on the premise that the supporting steel balls have enough bearing capacity.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a longitudinal sectional view of the present invention.
Fig. 3 is a transverse cross-sectional view of the present invention.
Fig. 4 is a use state diagram when the platform mechanism is moved to the position.
FIG. 5 is a view showing the platform mechanism in use as it moves toward another cross-support beam.
Detailed Description
To facilitate understanding of those skilled in the art, the structure of the present invention will now be described in further detail by way of examples in conjunction with the accompanying drawings:
referring to fig. 1-3, a construction platform for the upper part of a foundation pit crown beam comprises a platform mechanism 1, a fixed supporting mechanism 2 and a guide supporting mechanism 3,
the platform mechanism 1 comprises a platform base 101 and a platform plate 102 fixedly connected to the upper end of the platform base 101, a limiting groove 4 with an inverted L-shaped cross section is arranged below the platform base 101, and communication holes 5 communicated to the limiting groove 4 are formed in the bottom surface of the platform base 101 at equal intervals;
the fixed supporting mechanism 2 comprises a plurality of supporting rods which are pre-embedded on the foundation pit crown beam 6 at equal intervals, the upper parts of the supporting rods are outwards turned and arranged in an inverted L shape, and the interval between every two adjacent supporting rods is consistent with the interval between every two adjacent communicating holes 5;
the guide supporting mechanism 3 comprises two transverse supporting beams 301, the bottoms of the transverse supporting beams 301 are supported and mounted on a plurality of corresponding supporting rods, the tops of the transverse supporting beams 301 are provided with a plurality of corresponding accommodating holes, and corresponding supporting steel balls 302 are respectively and rollably mounted in the accommodating holes;
the distance between the upper end face of the supporting steel ball 302 and the lower end face of the folded part of the supporting rod is L1, the height of the upper part groove body of the limiting groove 4 is L2, the distance between the top face of the transverse supporting beam 301 and the lower end face of the folded part of the supporting rod is L3, the diameter of the supporting steel ball 302 is D, L1 is less than L2, and L2-L3 is less than D;
the communicating hole 5 on the platform base 101 moves to the position where the transverse supporting beam 301 is supported and installed after penetrating through the folding part of the supporting rod, so that the platform base 101 is installed, and the top surface of the limiting groove 4 of the platform base 101 is supported and installed at the top end part of the supporting steel ball 302;
the rear end of the platform plate 102 is fixedly connected with a corresponding traction ring 7, two sides of the platform base 101 respectively extend to the peripheries of two sides of the platform plate 102, and two sides of the platform base 101 are respectively fixedly connected with a corresponding lifting lug 8;
the diameter D of the supporting steel balls 302 is 15mm, the supporting steel balls 302 are arranged in a rectangular array, and the distance between every two adjacent supporting steel balls 302 is 15 mm.
The rear bottom support of the platform plate 102 is arranged on the ground at the periphery of the foundation pit crown beam 6, two corresponding fixing holes are formed in the rear side of the platform plate 102, and fixing shafts 9 with pointed bottoms are respectively embedded between the fixing holes and the ground at the periphery of the foundation pit crown beam in a positioning mode.
The bottom of the transverse supporting beam 301 is fixedly connected with a plurality of corresponding clamping grooves 10 at equal intervals, and the clamping grooves 10 are clamped on the folding parts of the corresponding supporting rods respectively.
The bottom of the transverse supporting beam 301 is fixedly connected with a plurality of corresponding reinforcing ribs 11, and two ends of each reinforcing rib 11 are fixedly connected to corresponding clamping grooves 10.
The front side of the platform plate 102 is provided with a plurality of locking threaded holes 12 for mounting guard rails.
The upper end of platform base 101 upwards is provided with a plurality of corresponding spliced poles 13 according to equidistant integrated into one piece, the front side bottom of landing slab 102 is passed through the welding mode rigid coupling respectively on the spliced pole 13.
During installation, the platform base 101 can be directly hoisted to the upper parts of the support rods of the fixed supporting mechanism 2, then the position of the platform base 101 is adjusted to enable the communication holes 5 to be respectively aligned and clamped into the corresponding support rods, the support rods are respectively clamped into the limiting grooves 4 of the platform base 101, and the platform base 101 can move back and forth between the support rods;
then hoisting the transverse supporting beam 301 to one side of the platform base 101, installing the bottom support of the transverse supporting beam 301 on the corresponding supporting rod, and then moving the platform base 101 towards the direction provided with the transverse supporting beam 301, as shown in fig. 4, so that the top surface of the limiting groove 4 of the platform base 101 supports the top end part of the supporting steel ball 302 installed on the transverse supporting beam 301;
then, the fixing shaft 9 with the pointed bottom is driven into the fixing hole of the platform plate 102, and the platform mechanism 1 can be positioned and installed;
when the position of the platform mechanism 1 needs to be adjusted, as shown in fig. 5, the other cross support beam 301 is only lifted to one side of the platform base 101, and then the movement and positioning actions of the platform base 101 are repeated to complete the position adjustment of the platform mechanism 1.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The utility model provides a construction platform for foundation ditch crown beam upper portion, includes platform mechanism (1), fixed stay mechanism (2) and direction supporting mechanism (3), its characterized in that:
the platform mechanism (1) comprises a platform base (101) and a platform plate (102) fixedly connected to the upper end of the platform base (101), a limiting groove (4) with an inverted L-shaped cross section is arranged below the platform base (101), and communication holes (5) communicated to the limiting groove (4) are formed in the bottom surface of the platform base (101) at equal intervals;
the fixed supporting mechanism (2) comprises a plurality of supporting rods which are pre-buried on the foundation pit crown beam (6) at equal intervals, the upper parts of the supporting rods are outwards turned and arranged in an inverted L shape, and the interval between every two adjacent supporting rods is consistent with the interval between every two adjacent communicating holes (5);
the guide supporting mechanism (3) comprises at least two transverse supporting beams (301), the bottoms of the transverse supporting beams (301) are supported and mounted on a plurality of corresponding supporting rods, a plurality of corresponding accommodating holes are formed in the tops of the transverse supporting beams (301), and corresponding supporting steel balls (302) are respectively mounted in the accommodating holes in a rolling mode;
the distance between the upper end face of the supporting steel ball (302) and the lower end face of the folding part of the supporting rod is L1, the height of the groove body of the upper part of the limiting groove (4) is L2, the distance between the top face of the transverse supporting beam (301) and the lower end face of the folding part of the supporting rod is L3, the diameter of the supporting steel ball (302) is D, L1 is less than L2, and L2-L3 is less than D;
the communicating hole (5) on the platform base (101) moves to the position where the transverse supporting beam (301) is supported and installed after penetrating through the folding part of the supporting rod, so that the platform base (101) is installed, and the top surface of the limiting groove (4) of the platform base (101) is supported and installed at the top end part of the supporting steel ball (302);
the rear end of the platform plate (102) is fixedly connected with a corresponding traction ring (7), two sides of the platform base (101) extend to the peripheries of two sides of the platform plate (102) respectively, and two sides of the platform base (101) are fixedly connected with corresponding lifting lugs (8) respectively;
the diameter D of the supporting steel balls (302) is not less than 15mm, the supporting steel balls (302) are arranged in a rectangular array, and the distance between every two adjacent supporting steel balls (302) is not more than 25 mm.
2. The construction platform for the upper part of the crown beam of the foundation pit as claimed in claim 1, wherein: the rear side bottom support of landing slab (102) is installed in foundation ditch crown beam (6) outlying subaerial, and the rear side of landing slab (102) is provided with at least one corresponding fixed orifices, fix a position respectively between fixed orifices and the foundation ditch crown beam outlying ground and inlay fixed axle (9) that are equipped with the bottom and be sharp.
3. The construction platform for the upper part of the crown beam of the foundation pit as claimed in claim 1, wherein: the bottom of the transverse supporting beam (301) is fixedly connected with a plurality of corresponding clamping grooves (10) at equal intervals, and the clamping grooves (10) are clamped on the folding parts of the corresponding supporting rods respectively.
4. A construction platform for the upper part of a crown beam of a foundation pit according to claim 3, wherein: the bottom of the transverse supporting beam (301) is fixedly connected with a plurality of corresponding reinforcing ribs (11) respectively, and two ends of each reinforcing rib (11) are fixedly connected to corresponding clamping grooves (10) respectively.
5. The construction platform for the upper part of the crown beam of the foundation pit as claimed in claim 1, wherein: the front side of the platform plate (102) is provided with a plurality of locking threaded holes (12) for mounting guard rails.
6. The construction platform for the upper part of the crown beam of the foundation pit as claimed in claim 1, wherein: the upper end of platform base (101) upwards is provided with a plurality of corresponding spliced poles (13) according to equidistant integrated into one piece, the front side bottom of landing slab (102) is in the rigid coupling through the welding mode respectively on spliced pole (13).
CN202010939884.2A 2020-09-09 2020-09-09 A construction platform for foundation ditch crown beam upper portion Active CN112030996B (en)

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CN202010939884.2A CN112030996B (en) 2020-09-09 2020-09-09 A construction platform for foundation ditch crown beam upper portion

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CN112030996B true CN112030996B (en) 2021-08-17

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112502212A (en) * 2020-12-08 2021-03-16 中交二航局第四工程有限公司 Rapid assembly platform suitable for taking soil in foundation pit and complete construction process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204875788U (en) * 2015-08-20 2015-12-16 宁波市新亚建设有限公司 Stride a foundation ditch supporting beam construction pile -supported platform device
JP2017008625A (en) * 2015-06-24 2017-01-12 鋼鈑商事株式会社 Mold support tool, and slab construction method using the same
CN207143966U (en) * 2017-08-09 2018-03-27 中国建筑第八工程局有限公司 The discharging platform on foundation ditch side
CN210002408U (en) * 2019-04-29 2020-01-31 中建四局第四建筑工程有限公司 steel platform for processing steel bars on foundation pit
CN111335611A (en) * 2020-03-25 2020-06-26 中国建筑土木建设有限公司 Large-span cantilever member construction system and construction method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017008625A (en) * 2015-06-24 2017-01-12 鋼鈑商事株式会社 Mold support tool, and slab construction method using the same
CN204875788U (en) * 2015-08-20 2015-12-16 宁波市新亚建设有限公司 Stride a foundation ditch supporting beam construction pile -supported platform device
CN207143966U (en) * 2017-08-09 2018-03-27 中国建筑第八工程局有限公司 The discharging platform on foundation ditch side
CN210002408U (en) * 2019-04-29 2020-01-31 中建四局第四建筑工程有限公司 steel platform for processing steel bars on foundation pit
CN111335611A (en) * 2020-03-25 2020-06-26 中国建筑土木建设有限公司 Large-span cantilever member construction system and construction method thereof

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