CN114525791B - Foundation pit steel support and steel trestle combined system - Google Patents

Foundation pit steel support and steel trestle combined system Download PDF

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Publication number
CN114525791B
CN114525791B CN202210189680.0A CN202210189680A CN114525791B CN 114525791 B CN114525791 B CN 114525791B CN 202210189680 A CN202210189680 A CN 202210189680A CN 114525791 B CN114525791 B CN 114525791B
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China
Prior art keywords
steel
steel support
trestle
support
bailey
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CN202210189680.0A
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Chinese (zh)
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CN114525791A (en
Inventor
王震
唐涛
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Shanghai Jukun Technology Co ltd
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Shanghai Jukun Technology Co ltd
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Priority to CN202210189680.0A priority Critical patent/CN114525791B/en
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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
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00Movable or portable bridges; Floating bridges
    • E01D15/12Portable or sectional bridges
    • E01D15/133Portable or sectional bridges built-up from readily separable standardised sections or elements, e.g. Bailey bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/005Piers, trestles, bearings, expansion joints or parapets specially adapted for portable or sectional bridges

Abstract

The invention relates to a foundation pit steel support and steel trestle combined system, wherein a trestle steel support combined unit comprises a steel support device, and the steel support device is connected with trestle devices positioned on two sides of the steel support device into a whole through a connecting system; the steel support device comprises a concrete beam with two ends propped against the inside of the foundation pit and can apply prestress to the concrete beam; the steel trestle device comprises two parallel bailey frames and a supporting frame for transversely connecting the two bailey frames; the connecting system comprises a connecting rod system, a horizontal drawknot piece and a vertical drawknot piece, wherein one end of the vertical drawknot piece is connected with the steel support through a bolt, and the other end of the vertical drawknot piece is connected with the bailey frame; the horizontal drawknot piece comprises a drawstring piece and a slidable connecting piece, one end of the drawstring piece is connected with the bottom surface of the steel support through a bolt, the other end of the drawstring piece is connected with the lower rod of the bailey frame through the slidable connecting piece, and the slidable connecting piece can longitudinally slide and can adjust the position so as to avoid the influence of stress deformation of the steel support on the bailey frame; the support beam vertically supports the steel support device and the steel trestle device.

Description

Foundation pit steel support and steel trestle combined system
Technical Field
The invention relates to a foundation pit steel support and steel trestle combined system, and belongs to the technical field of building construction.
Background
In order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, the supporting, reinforcing and protecting measures adopted for the side wall of the foundation pit and the surrounding environment are needed. Since most deep foundation pit projects, such as high-rise buildings and subway construction, are excavated in cities, various structures such as traffic channels, built buildings or pipelines are usually arranged around the foundation pit, and the steel structure internal support system is widely applied in order to ensure the safety of the surrounding environment of the foundation pit, save the construction period and the cost.
In the prior art, the foundation pit is not provided with a steel support at the position where the trestle is needed, and a concrete support is often adopted, so that the steel support is limited in use, a large amount of garbage can be generated when the trestle is used, the construction period is long, and the construction is troublesome to dismantle.
Disclosure of Invention
The invention aims to provide a foundation pit steel support and steel trestle combined system, which combines a steel support and a steel trestle, wherein the steel support only bears horizontal soil pressure, the steel trestle only bears vertical loads such as travelling crane and the like, is stressed and separated, and the steel support and the steel trestle are laterally connected and mutually supported to form an integral stabilizing system, so that the applicability of the steel support and the steel trestle is improved, the concrete support and the trestle are replaced, a large amount of construction waste is avoided, and a large amount of construction period is saved.
The invention adopts the following technical scheme:
a foundation pit steel support and steel trestle combined system comprises trestle steel support combined units and a support beam 7; the trestle steel support combination unit comprises a steel support device, and the steel support device is connected with trestle devices positioned on two sides of the steel support device into a whole through a connecting system; the steel support device comprises a steel support 9, wherein two ends of the steel support are propped against the concrete beam in the foundation pit, and can apply prestress to the concrete beam; the steel trestle device comprises two parallel bailey frames and a supporting frame 3 for transversely connecting the two bailey frames; the connecting system comprises a connecting rod system, a horizontal drawknot piece 4 and a vertical drawknot piece 5, wherein one end of the vertical drawknot piece 5 is connected with a steel support 9 through a bolt, and the other end of the vertical drawknot piece is connected with the bailey frame; the horizontal drawknot member 4 comprises a drawstring member 402 and a slidable connecting member 401, wherein one end of the drawstring member 402 is connected with the bottom surface of the steel support through a bolt, the other end of the drawstring member 402 is connected with the lower rod 201 of the bailey frame through the slidable connecting member 401, and the slidable connecting member 401 can longitudinally slide and adjust the position so as to avoid the influence of the stress deformation of the steel support 9 on the bailey frame; the support beam 7 vertically supports the steel support device and the steel trestle device.
Preferably, the slidable connector 401 is two clamps, and is clamped laterally to the bailey lower rod 201 by bolts.
Preferably, the steel supporting device further comprises a section steel trabecula 12, a panel 11 and a concrete bracket 6; the same bailey frame is connected and lengthened by adopting a pin shaft, two bailey frame supports are connected and fixed through a supporting frame 3, a bailey frame lower rod 201 is placed on the supporting frame beam 7, a section steel trabecula 12 is placed on a bailey frame upper rod, the bailey frame upper rod is fixed with the bailey frame upper rod by adopting a cross hoop, and a panel 11 is placed on the section steel trabecula 12 to provide a running surface.
Preferably, the device further comprises a column 8, wherein a column head 801 is arranged at the upper part of the column 8, and the support beam 7 is arranged on the column 8 and is connected with the column head 801;
further, the steel support 9 and the steel trestle device are both placed on the support beam 7 and connected with the support beam 7 by using a cross hoop or a clamp.
Further, end bailey frames of the steel supporting means at both ends are placed above the concrete bracket 6 and the concrete beam.
Preferably, the diagonal members 402 are arranged in a splayed pair, wherein the side connected to the steel support is a splayed closing side, and the side connected to the slidable connecting member 401 is a splayed opening side.
The invention has the beneficial effects that:
1) The steel support is combined with the steel trestle, the steel support only bears horizontal soil pressure, the steel trestle only bears vertical loads such as travelling crane and the like, the stress is separated, the steel support is laterally connected with the steel trestle and mutually supported, and an integral stabilizing system is formed.
2) The applicability of the steel support and the steel trestle is improved, the problem that the steel support cannot be arranged at the position of the existing trestle is avoided, the concrete support and the trestle can be replaced, a large amount of construction waste is avoided, and a large amount of construction period is saved.
3) The structural design is reliable, and the safety and the adjustability of the stress are fully considered.
Drawings
FIG. 1 is a top view of a foundation pit steel support and steel trestle coupling system of the present invention.
Fig. 2 is a side view of the bailey frame.
Fig. 3 is a side view of a steel support.
Fig. 4 is a cross-sectional view 5-5 of fig. 1.
FIG. 5 is a detailed view of the horizontal tie rod portion; wherein (a) is a top view and (b) is a 2-2 cross-sectional view of (a).
In the figure, 1, a concrete crown beam, 2, a bailey frame, 3, a support frame, 4, a horizontal drawknot piece, 5, a vertical drawknot piece, 6, a concrete bracket, 7, a support beam, 8, a stand column, 9, a steel support, 11, a panel, 12, a section steel trabecula, 201, a bailey frame lower rod, 401, a sliding connection piece, 402, a cable-stayed piece and 801, a column head.
Detailed Description
The invention will be further described with reference to the drawings and specific examples.
Referring to fig. 1-5, a foundation pit steel support and steel trestle combined system comprises trestle steel support combined units and a support beam 7; the trestle steel support combination unit comprises a steel support device, and the steel support device is connected with trestle devices positioned on two sides of the steel support device into a whole through a connecting system; the steel support device comprises a steel support 9, wherein two ends of the steel support are propped against the concrete beam in the foundation pit, and can apply prestress to the concrete beam; the steel trestle device comprises two parallel bailey frames and a supporting frame 3 for transversely connecting the two bailey frames; the connecting system comprises a connecting rod system, a horizontal drawknot piece 4 and a vertical drawknot piece 5, wherein one end of the vertical drawknot piece 5 is connected with a steel support 9 through a bolt, and the other end of the vertical drawknot piece is connected with the bailey frame; the horizontal drawknot member 4 comprises a drawstring member 402 and a slidable connecting member 401, wherein one end of the drawstring member 402 is connected with the bottom surface of the steel support through a bolt, the other end of the drawstring member 402 is connected with the lower rod 201 of the bailey frame through the slidable connecting member 401, and the slidable connecting member 401 can longitudinally slide and adjust the position so as to avoid the influence of the stress deformation of the steel support 9 on the bailey frame; the support beam 7 vertically supports the steel support device and the steel trestle device.
The concept of the bailey frame belongs to the prior art, and this embodiment is not described in detail.
In this embodiment, referring to fig. 5 (b), the slidable connector 401 is two clamps, and is laterally clamped to the bailey lower rod 201 by bolts.
In this embodiment, referring to fig. 2, the steel support device further comprises a section steel trabecula 12, a panel 11, a concrete bracket 6; the same bailey frame is connected and lengthened by adopting a pin shaft, two bailey frame supports are connected and fixed through a supporting frame 3, a bailey frame lower rod 201 is placed on the supporting frame beam 7, a section steel trabecula 12 is placed on a bailey frame upper rod, the bailey frame upper rod is fixed with the bailey frame upper rod by adopting a cross hoop, and a panel 11 is placed on the section steel trabecula 12 to provide a running surface.
In this embodiment, referring to fig. 2, the device further comprises a column 8, the upper part of the column 8 is provided with a column head 801, and the support beam 7 is arranged on the column 8 and is connected with the column head 801;
in this embodiment, referring to fig. 3, the steel support 9, the steel trestle device are placed on the support beam 7 and connected to the support beam 7 with a cross collar or clamp.
In this embodiment, referring to fig. 2, end bailey frames of the steel support devices at both ends are placed above the concrete corbels 6 and the concrete beams.
In this embodiment, referring to fig. 5 (a), the diagonal members 402 are arranged in a splayed pair, wherein the side connected to the steel support is the splayed closed side, and the side connected to the slidable connecting member 401 is the splayed open side.
According to the invention, the steel support is combined with the steel trestle, the steel support only bears horizontal soil pressure, the steel trestle only bears vertical loads such as travelling crane and the like, the stress is separated, and the steel support and the steel trestle are laterally connected and mutually supported, so that an integral stabilizing system is formed, the applicability of the steel support and the steel trestle is increased, the concrete support and the trestle are replaced, a large amount of construction waste is avoided, and a large amount of construction period is saved.
The foregoing is a preferred embodiment of the present invention, and various changes and modifications may be made therein by those skilled in the art without departing from the general inventive concept, and such changes and modifications should be considered as falling within the scope of the claimed invention.

Claims (4)

1. The utility model provides a foundation ditch steel support and steel landing stage combined system which characterized in that:
comprises a trestle steel support combination unit and a support beam (7);
the trestle steel support combination unit comprises steel support devices, and the steel support devices are connected with the steel trestle devices positioned on two sides of the trestle steel support combination unit into a whole through a connecting system;
the steel support device comprises a steel support (9) with two ends propped against the concrete beam in the foundation pit and capable of applying prestress to the concrete beam;
the steel trestle device comprises two parallel bailey frames and a supporting frame (3) for transversely connecting the two bailey frames;
the connecting system comprises a connecting rod system, a horizontal drawknot piece (4) and a vertical drawknot piece (5), wherein one end of the vertical drawknot piece (5) is connected with a steel support (9) through a bolt, and the other end of the vertical drawknot piece is connected with the bailey frame;
the horizontal drawknot member (4) comprises a drawstring member (402) and a slidable connecting member (401), wherein one end of the drawstring member (402) is connected with the bottom surface of the steel support through a bolt, the other end of the drawstring member is connected with the lower rod (201) of the bailey frame through the slidable connecting member (401), and the slidable connecting member (401) can slide longitudinally and can adjust the position so as to avoid the influence of stress deformation of the steel support (9) on the bailey frame;
the support beam (7) vertically supports the steel support device and the steel trestle device;
the slidable connecting piece (401) is provided with two clamping devices, and is laterally clamped on the bailey frame lower rod (201) through bolts;
the cable-stayed piece (402) is arranged in a splayed pair mode, wherein one side connected with the steel support is a splayed closing side, and one side connected with the slidable connecting piece (401) is a splayed opening side;
the steel trestle device also comprises a section steel trabecula (12), a panel (11) and a concrete bracket (6);
the same bailey frame is connected and lengthened by adopting a pin shaft, two bailey frame supports are connected and fixed through a supporting frame (3), a bailey frame lower rod (201) is placed on the supporting beam (7), the section steel trabecula (12) is placed on a bailey frame upper rod, the bailey frame upper rod is fixed with the bailey frame upper rod by adopting a groined hoop, and the panel (11) is placed on the section steel trabecula (12) to provide a running surface;
the steel support device is not subjected to vertical loads.
2. The foundation pit steel support and steel trestle combining system of claim 1, wherein: the support is characterized by further comprising an upright post (8), wherein a column head (801) is arranged on the upper portion of the upright post (8), and the support beam (7) is arranged on the upright post (8) and connected with the column head (801).
3. The foundation pit steel support and steel trestle combining system of claim 2, wherein: the steel support (9) and the steel trestle device are both arranged on the support beam (7) and are connected with the support beam (7) by using a cross hoop or a clamp.
4. A foundation pit steel support and steel trestle combining system according to claim 3, wherein: the end bailey frames of the steel supporting devices at the two ends are placed above the concrete brackets (6) and the concrete beam.
CN202210189680.0A 2022-02-28 2022-02-28 Foundation pit steel support and steel trestle combined system Active CN114525791B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210189680.0A CN114525791B (en) 2022-02-28 2022-02-28 Foundation pit steel support and steel trestle combined system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210189680.0A CN114525791B (en) 2022-02-28 2022-02-28 Foundation pit steel support and steel trestle combined system

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CN114525791B true CN114525791B (en) 2023-09-19

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203684059U (en) * 2013-09-29 2014-07-02 中铁四局集团第四工程有限公司 Large-span deck Bailey beam steel trestle structure
CN205062817U (en) * 2015-09-01 2016-03-02 中国建筑第八工程局有限公司 Landing stage with combination of excavation supporting system
CN208472733U (en) * 2018-05-22 2019-02-05 江苏东合南岩土科技股份有限公司 A kind of foundation pit supporting beam trestle
CN112681331A (en) * 2020-12-03 2021-04-20 中国建筑第八工程局有限公司 Steel support and steel trestle integrated structure and construction method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203684059U (en) * 2013-09-29 2014-07-02 中铁四局集团第四工程有限公司 Large-span deck Bailey beam steel trestle structure
CN205062817U (en) * 2015-09-01 2016-03-02 中国建筑第八工程局有限公司 Landing stage with combination of excavation supporting system
CN208472733U (en) * 2018-05-22 2019-02-05 江苏东合南岩土科技股份有限公司 A kind of foundation pit supporting beam trestle
CN112681331A (en) * 2020-12-03 2021-04-20 中国建筑第八工程局有限公司 Steel support and steel trestle integrated structure and construction method thereof

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