CN212956558U - Node structure of beam string and truss - Google Patents
Node structure of beam string and truss Download PDFInfo
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- CN212956558U CN212956558U CN202021609570.8U CN202021609570U CN212956558U CN 212956558 U CN212956558 U CN 212956558U CN 202021609570 U CN202021609570 U CN 202021609570U CN 212956558 U CN212956558 U CN 212956558U
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- truss
- string
- concrete
- concrete beam
- prestress
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- 239000004567 concrete Substances 0.000 claims abstract description 62
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 7
- 239000011378 shotcrete Substances 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a node structure of a beam string and a truss, which comprises a concrete beam, a beam string, a prestress adjusting device, a prestress connecting piece and a tensile device; the concrete beam is arranged on the inner wall of the foundation pit; the end part pull rod of the beam string is embedded in the concrete beam and is fixedly connected with the concrete beam in an integrated manner; the middle web member of the beam string directly acts on the concrete beam; the concrete beam in the foundation pit is internally embedded with metal parts, the prestress adjusting device is connected with a prestress connecting piece, and the prestress connecting piece is connected with a tensile device. The novel steel-concrete combined beam string system is formed by eliminating a steel purlin in the existing system, directly combining a steel pull rod and a concrete beam and increasing the tensile capacity of the system on the basis of the existing foundation pit support system with the compression resistance function.
Description
Technical Field
The utility model relates to a steel bearing structure in the foundation ditch especially relates to a beam string and truss's node structure, belongs to construction technical field.
Background
The foundation pit beam string is an auxiliary component structure used for supporting the side wall of the foundation pit in the foundation pit. In the prior art, for the beam string used for supporting the foundation pit, the quality of a concrete crown beam or a waist beam on a construction site is difficult to guarantee by a law, the size error is obvious, the connection force transmission between a steel purlin system and the concrete crown beam or the waist beam is undefined, the reliability is poor, and potential safety hazards exist; the steel purlin is flexible connection, can not provide the required rigidity of system normal use.
In addition, the existing foundation pit steel supporting system can only be compressed and can not be in tension. For a deep foundation pit, sludge exists in soil outside the pit, or excavation on two sides of an external corner support of the foundation pit is unbalanced, and under the condition of multiple supports, the enclosure structure is likely to expand outwards under different working conditions such as excavation and support replacement, so that the enclosure structure is separated from the support, the calculated stress assumption is inconsistent, uncertainty of excavation of the foundation pit is difficult to deal with, and the safety problem of the foundation pit is likely to occur.
Chinese patent publication No. CN104532850A, published 2015, 4-month, and 22-day, discloses a foundation pit supporting system, which adopts the structure of the beam string.
Disclosure of Invention
The invention aims to provide a node structure of a beam string and a truss, which cancels a steel purlin in the existing system, forms a novel steel concrete combined beam string system by directly combining a steel pull rod and a concrete beam, and has the advantages of convenient construction, definite stress, stronger integrity and higher safety of the system; meanwhile, the tensile capacity of the system is increased on the basis of the existing foundation pit inner support system with the compression resistance function, so that a novel steel concrete combined beam string system is formed.
The invention adopts the following technical scheme:
a node structure of a beam string and a truss comprises a concrete beam 2 and the beam string; the concrete beam is arranged on the inner wall of the foundation pit; the end part pull rod 1 of the beam string is pre-embedded in the concrete beam 2 and is fixedly connected with the concrete beam 2 in an integrated manner; the middle web member 4 of the beam string directly acts on the concrete beam 2; tensile device 5 includes pre-buried metalwork in the concrete beam 2 in the foundation ditch, and prestressing force adjusting device 6 is connected with prestressing force connecting piece 7, prestressing force connecting piece 7 with the metalwork stretches out the position of concrete beam 2 is connected.
Preferably, the part of the metal piece extending out of the concrete beam 2 is provided with concrete which is integrally cast with the concrete beam 2.
Preferably, an active prestress adjusting device is arranged on the middle web member 4 of the beam string.
Further, the active prestress adjusting device is a jack.
Furthermore, a plurality of middle pull rods are arranged between the pair of end pull rods 1, and the pull rods are directly hinged and connected.
In a further development, the intermediate web member 4 is also connected in an articulated manner to a tie rod.
Preferably, the bearing surface of the concrete beam 2, which is pushed by the middle web member 4, is a plane.
Preferably, a pair of the end pull rods 1 are symmetrically and obliquely embedded and fixed in the concrete beam 2.
Preferably, the concrete girder 2 is a crown girder or a wale.
Preferably, the metal piece is pre-buried section steel or reinforcing steel.
The beneficial effects of the utility model reside in that:
1) the novel steel concrete hybrid beam system is formed by directly combining a steel pull rod and a concrete beam without a steel purlin in the existing system, the construction is convenient, the stress is clear, the integrity of the system is stronger, and the safety is higher.
2) The quality of the concrete crown beam or waist beam on the construction site is improved, and the size error is reduced;
3) different from a steel purlin, concrete can be poured integrally without sectional splicing, so that the problems of undefined connection force transfer and poor reliability of a steel purlin system and a concrete crown beam or waist beam are solved, and potential safety hazards are eliminated;
4) the problem and the hidden danger that steel purlin itself is that one section welding is assembled when the site operation, for the flexonics, can't provide the rigidity that the system normally used needs are solved.
5) Because do not set up the steel purlin, truss structure and the effect that the system reaches the separation separately of string roof beam separately increase the construction convenience, improve the flexibility ratio, improve the efficiency of construction, increase the degree of safety of whole system.
6) The problem of traditional steel shotcrete not be pulled is solved, in the relatively poor deep basal pit of soil property, can replace first concrete shotcrete support ("first concrete shotcrete support" indicates that the one deck of top between 0 meters to secret n meters from the underground supports, because the tensile demand is higher, generally adopt not adopting the steel shotcrete to support among the prior art and adopt pure concrete to support), adopt the node structure of the internal tension chord girder of foundation ditch and truss of this application, owing to promote tensile property by a wide margin, then can also adopt the steel shotcrete with first support, thereby multichannel steel shotcrete can form the support system of integration, make whole support system more stable safety.
Drawings
Fig. 1 is a schematic view of the connection between a beam string and a concrete beam.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a schematic structural diagram of a foundation pit supporting system adopting the tension string beam for supporting the combined foundation pit.
Fig. 4 is the utility model discloses the node structure sketch map of an internal beam string and truss of foundation ditch.
In the figure, 1, an end pull rod, 2, a concrete beam, 3, a middle pull rod, 4, a middle web member, 5, a tensile device, 6, a prestress adjusting device and 7, a prestress connecting piece.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1-2 and 4, a node structure of a beam string and a truss comprises a concrete beam 2 and a beam string; the concrete beam is arranged on the inner wall of the foundation pit; the end part pull rod 1 of the beam string is pre-embedded in the concrete beam 2 and is fixedly connected with the concrete beam 2 in an integrated manner; the middle web member 4 of the beam string directly acts on the concrete beam 2; tensile device 5 includes pre-buried metalwork in the concrete beam 2 in the foundation ditch, and prestressing force adjusting device 6 is connected with prestressing force connecting piece 7, prestressing force connecting piece 7 with the metalwork stretches out the position of concrete beam 2 is connected.
In this embodiment, referring to fig. 4, the part of the metal member extending out of the concrete beam 2 has concrete cast integrally with the concrete beam 2 (see the box part above the reference numeral 5 in fig. 4).
With continued reference to fig. 1-2 and 4, the middle web member 4 of the beam string is provided with an active prestress adjusting device.
As a preferred embodiment, the active prestressing adjustment means may be a jack, as shown in fig. 1.
Referring to fig. 1, a plurality of intermediate pull rods are further arranged between a pair of end pull rods 1, and the pull rods are directly hinged and connected.
Referring to fig. 1-2, the intermediate web member 4 is also hingedly connected to the tie rod, which provides a high flexibility of the intermediate stay 4.
Referring to fig. 1-2, the bearing surface of the concrete beam 2, which is pushed by the middle web member 4, is a plane.
With continued reference to fig. 1, a pair of end tie rods 1 are symmetrically and obliquely embedded and fixed inside the concrete beam 2.
In this embodiment, the concrete girder 2 is a crown girder or a wale, as shown in fig. 3.
In this embodiment, the metal member is pre-embedded steel, and in another embodiment, it may be a steel bar.
While the preferred embodiments of the present invention have been described, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Claims (10)
1. The utility model provides a node structure of beam string and truss which characterized in that:
comprises a concrete beam (2), a beam string, a prestress adjusting device (6), a prestress connecting piece (7) and a tensile device (5);
the concrete beam is arranged on the inner wall of the foundation pit;
the end pull rod (1) of the beam string is pre-embedded in the concrete beam (2) and is fixedly connected with the concrete beam (2) in an integrated manner; the middle web member (4) of the beam string directly acts on the concrete beam (2);
tensile device (5) are connected with prestressing force connecting piece (7) including pre-buried metalwork in concrete beam (2) in the foundation ditch, prestressing force adjusting device (6), prestressing force connecting piece (7) with the metalwork stretches out the position of concrete beam (2) is connected.
2. The truss-string beam and truss joint structure as claimed in claim 1, wherein: and concrete which is integrally cast with the concrete beam (2) is arranged at the part of the metal piece, which extends out of the concrete beam (2).
3. The truss-string beam and truss joint structure as claimed in claim 1, wherein: and an active prestress adjusting device is arranged on the middle web member (4) of the beam string.
4. The truss-string beam and truss node structure as claimed in claim 3, wherein: the active prestress adjusting device is a jack.
5. The truss-string beam and truss joint structure as claimed in claim 1, wherein: a plurality of middle pull rods are arranged between the end pull rods (1), and the pull rods are directly hinged and connected.
6. The truss-string beam and truss node structure as claimed in claim 5, wherein: the middle web member (4) is also hinged with the pull rod.
7. The truss-chord member and truss joint structure as claimed in claim 1 or 2, wherein: and the stress surface of the concrete beam (2) which is subjected to the thrust of the middle web member (4) is a plane.
8. The truss-chord member and truss joint structure as claimed in claim 1 or 2, wherein: and the end pull rods (1) are symmetrically and obliquely embedded and fixed in the concrete beam (2).
9. The truss-chord member and truss joint structure as claimed in claim 1 or 2, wherein: the concrete beam (2) is a crown beam or a wale.
10. The truss-chord member and truss joint structure as claimed in claim 1 or 2, wherein: the metal piece is pre-buried section steel or reinforcing steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021609570.8U CN212956558U (en) | 2020-08-05 | 2020-08-05 | Node structure of beam string and truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021609570.8U CN212956558U (en) | 2020-08-05 | 2020-08-05 | Node structure of beam string and truss |
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| Publication Number | Publication Date |
|---|---|
| CN212956558U true CN212956558U (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021609570.8U Active CN212956558U (en) | 2020-08-05 | 2020-08-05 | Node structure of beam string and truss |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529740A (en) * | 2021-07-29 | 2021-10-22 | 江西建工第一建筑有限责任公司 | Beam string supporting system |
| CN114427228A (en) * | 2022-01-27 | 2022-05-03 | 厦门安捷建筑工程有限公司 | A multiple lower chord formula large-span beam string structure of stretching for foundation ditch |
-
2020
- 2020-08-05 CN CN202021609570.8U patent/CN212956558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529740A (en) * | 2021-07-29 | 2021-10-22 | 江西建工第一建筑有限责任公司 | Beam string supporting system |
| CN114427228A (en) * | 2022-01-27 | 2022-05-03 | 厦门安捷建筑工程有限公司 | A multiple lower chord formula large-span beam string structure of stretching for foundation ditch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Joint structure of beam string and truss Effective date of registration: 20210707 Granted publication date: 20210413 Pledgee: Zhejiang Xiangyi Leasing Co.,Ltd. Pledgor: Shanghai Jukun Technology Co.,Ltd. Registration number: Y2021310000045 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231102 Granted publication date: 20210413 Pledgee: Zhejiang Xiangyi Leasing Co.,Ltd. Pledgor: Shanghai Jukun Technology Co.,Ltd. Registration number: Y2021310000045 |