CN212375879U - Combined foundation pit supporting beam string - Google Patents
Combined foundation pit supporting beam string Download PDFInfo
- Publication number
- CN212375879U CN212375879U CN202021603271.3U CN202021603271U CN212375879U CN 212375879 U CN212375879 U CN 212375879U CN 202021603271 U CN202021603271 U CN 202021603271U CN 212375879 U CN212375879 U CN 212375879U
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- string
- prestress
- concrete beam
- foundation pit
- supporting
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 abstract description 17
- 239000002184 metal Substances 0.000 abstract 2
- 238000009412 basement excavation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
The utility model relates to a string roof beam is opened in combined foundation ditch support, include: the inner side of the concrete beam is not provided with a steel purlin, and a pull rod at the end part of a string beam is embedded and fixed in the concrete beam; the supporting prestress device directly or indirectly acts on the concrete beam at the position corresponding to the end pull rod; the supporting prestress device is not rigidly connected with the end pull rod; the tensile device comprises a pre-buried metal piece in a concrete beam in a foundation pit, the prestress adjusting device is connected with a prestress connecting piece, and the prestress connecting piece is connected with a position, extending out of the concrete beam, of the metal piece. The utility model discloses make independent separately between truss braced system and the beam string braced system to can install the construction alone in the work progress, also can the isolated operation when demolising, shorten construction period, promote the construction flexibility.
Description
Technical Field
The utility model relates to a foundation ditch braced system especially relates to a string roof beam is opened in combined foundation ditch support belongs to construction technical field.
Background
In order to ensure the safety of the construction of the underground structure and the surrounding environment of the foundation pit, the supporting, reinforcing and protecting measures are adopted for the side wall of the foundation pit and the surrounding environment. In deep foundation pit engineering of high-rise buildings and subways, because excavation is carried out in cities, various structures such as traffic main roads, built buildings or pipelines and the like usually exist around foundation pits, which relates to an important content of excavation of the foundation pits and protects safe use of the surrounding structures.
In the prior art, independence (through steel enclosing purlin interconnect) is lacked between truss braced system and the beam string braced system, leads to unable installation construction alone in the work progress, demolishs and also needs the collaborative operation, influences construction period, reduces the construction flexibility. For example, chinese patent publication No. CN104532850A, published as 2015, 4/22, discloses a foundation pit supporting system, which uses the above-mentioned directly-supported prestressing device, the directly-supported prestressing adjustment mechanism thereof abuts against two opposite steel enclosing purlins, an obliquely-arranged diagonal rod is arranged between the main supporting beam and the steel enclosing purlin, and two ends of the diagonal rod are respectively hinged to the main supporting beam and the steel enclosing purlin.
In addition, in the prior art, the foundation pit steel support 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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a combination type foundation pit supporting beam string, which enables a truss supporting system and a beam string supporting system to be independent respectively, thereby being capable of being independently installed and constructed in the construction process, being capable of being independently operated during dismantling, shortening the construction period and improving the construction flexibility; meanwhile, a steel enclosing purlin is not needed, the pull rod in the beam string is connected with the concrete beam in a pulling and pressing mode through the support rod to form a novel combined beam string system, the whole set of steel supporting system has bidirectional rigidity towards the inside and the outside of the pit in foundation pit supporting, and the steel enclosing purlin is stronger in integrity and higher in safety.
The utility model adopts the following technical proposal:
a combined foundation pit supporting beam string, comprising: the inner side of the concrete beam 2 is not provided with a steel purlin, and a tension rod 1 at the end part of a string beam is embedded and fixed in the concrete beam 2; the supporting prestress device directly or indirectly acts on the concrete beam 2 corresponding to the end pull rod 1; the supporting prestress device is not rigidly connected with the end pull rod 1; tensile device 8, tensile device 5 includes pre-buried metalwork in the concrete beam 2 in the foundation ditch, and prestressing force adjusting device 3 is connected with prestressing force connecting piece 4, prestressing force connecting piece 4 with the metalwork stretches out the position of concrete beam 2 is connected.
Preferably, said supporting prestressing means also comprise said tensile means 8.
Further, the supporting prestressing device vertically acts on the concrete beam 2.
Preferably, the end tie rods 1 are obliquely embedded and fixed in the concrete beam 2.
Furthermore, the supporting prestress device comprises supporting rods which are connected in sequence.
Further, the prestress adjusting means 3 of the supporting prestress means acts on the secondary grouting area 5 on the concrete girder 2.
Furthermore, the supporting rod is a section steel supporting rod.
The beneficial effects of the utility model reside in that: the truss support system and the beam string support system are independent from each other, so that the truss support system and the beam string support system can be independently installed and constructed in the construction process and can also be independently operated during dismantling, the construction period is shortened, and the construction flexibility is improved; need not steel purlin, will open the pull rod in the string roof beam and carry out the tension-compression with the concrete beam through the vaulting pole and be connected and form neotype combination string roof beam system for a whole set of steel braced system has to hole inside and to hole outside two-way rigidity in foundation ditch support, and the wholeness is stronger, the security is higher.
Drawings
Fig. 1 is included the utility model discloses a combined foundation ditch supports a string beam's foundation ditch braced system's schematic diagram, the outside structure of the unexpected foundation ditch in figure.
Fig. 2 is an enlarged view of a structural portion of the beam string of fig. 1.
Fig. 3 is a partially enlarged view of fig. 2.
Fig. 4 is an enlarged view of the node structure of the beam string and the truss in fig. 1, which is located at the corresponding position of the diagonal bracing prestressing device.
In the figure, 1, an end pull rod, 2, a concrete beam, 3, a prestress adjusting device, 4, a prestress connecting piece, 5, a secondary grouting area, 6, a concrete bracket, 7, a middle pull rod and 8, a tensile device.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 3, a combined supporting beam for foundation pit string includes: the inner side of the concrete beam 2 is not provided with a steel purlin, and a tension rod 1 at the end part of a string beam is embedded and fixed in the concrete beam 2; the supporting prestress device directly or indirectly acts on the concrete beam 2 corresponding to the end pull rod 1; the supporting prestress device is not rigidly connected with the end pull rod 1; tensile device 8, tensile device 5 includes pre-buried metalwork in the concrete beam 2 in the foundation ditch, and prestressing force adjusting device 3 is connected with prestressing force connecting piece 4, prestressing force connecting piece 4 with the metalwork stretches out the position of concrete beam 2 is connected. The truss support system and the beam string support system are independent from each other due to the structural design, so that the truss support system and the beam string support system can be independently installed and constructed in the construction process and can also be independently operated during dismantling, the construction period is shortened, and the construction flexibility is improved; meanwhile, a steel enclosing purlin is not needed, the pull rod in the beam string is connected with the concrete beam in a pulling and pressing mode through the support rod to form a novel combined beam string system, the whole set of steel supporting system has bidirectional rigidity towards the inside and the outside of the pit in foundation pit supporting, and the steel enclosing purlin is stronger in integrity and higher in safety.
Wherein the truss support system is a straight truss system acting vertically on the concrete beam 2, see figure 4.
As a preferable scheme of this embodiment, the end tie rods 1 are obliquely embedded and fixed in the concrete beam 2, as shown in fig. 4, with this design, a steel purlin can be omitted, so that the beam string is stressed clearly, the integrity of the system is stronger, and the safety is higher.
Referring to fig. 4, the supporting prestress device comprises a supporting rod, a prestress connecting piece 4 and a prestress adjusting device 3 which are connected in sequence.
With continued reference to fig. 4, the support rods are profile steel support rods.
The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements on the above embodiments without departing from the general concept of the present invention, and these changes or improvements should fall within the scope of the present invention.
Claims (7)
1. The utility model provides a combined foundation ditch supports beam string roof beam which characterized in that includes:
the inner side of the concrete beam (2) is not provided with a steel purlin, and a tension rod (1) at the end part of a string beam is embedded and fixed in the concrete beam (2);
the supporting prestress device directly or indirectly acts on the concrete beam (2) corresponding to the end pull rod (1); the supporting prestress device is not rigidly connected with the end pull rod (1);
tensile device (8), tensile device (8) are connected with prestressing force adjusting device (3) and prestressing force connecting piece (4) including pre-buried metalwork in concrete beam (2) in the foundation ditch, prestressing force connecting piece (4) with the metalwork stretches out the position of concrete beam (2) is connected.
2. The combination type foundation pit bracing beam string beam of claim 1, wherein: the supporting prestressing means also comprise the tensile means (8).
3. The combined foundation pit bracing beam according to claim 2, wherein: the supporting prestress device vertically acts on the concrete beam (2).
4. The combination type foundation pit bracing beam string beam of claim 1, wherein: the end pull rod (1) is obliquely embedded and fixed in the concrete beam (2).
5. The combination type foundation pit bracing beam string according to claim 3, characterized in that: the support prestress device comprises support rods which are connected in sequence.
6. The combination type foundation pit bracing beam string according to claim 3, characterized in that: the prestress adjusting device (3) of the support prestress device acts on the secondary grouting area (5) on the concrete beam (2).
7. The combination type foundation pit bracing beam string beam of claim 5, wherein: the support rod is a section steel support rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021603271.3U CN212375879U (en) | 2020-08-05 | 2020-08-05 | Combined foundation pit supporting beam string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021603271.3U CN212375879U (en) | 2020-08-05 | 2020-08-05 | Combined foundation pit supporting beam string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212375879U true CN212375879U (en) | 2021-01-19 |
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|---|---|---|---|
| CN202021603271.3U Active CN212375879U (en) | 2020-08-05 | 2020-08-05 | Combined foundation pit supporting beam string |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764405A (en) * | 2020-08-05 | 2020-10-13 | 上海巨鲲科技有限公司 | Combined foundation pit supporting beam string |
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2020
- 2020-08-05 CN CN202021603271.3U patent/CN212375879U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764405A (en) * | 2020-08-05 | 2020-10-13 | 上海巨鲲科技有限公司 | Combined foundation pit supporting beam string |
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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 |
Denomination of utility model: Composite beam string of foundation pit support Effective date of registration: 20210707 Granted publication date: 20210119 Pledgee: Zhejiang Xiangyi Leasing Co.,Ltd. Pledgor: Shanghai Jukun Technology Co.,Ltd. Registration number: Y2021310000045 |
|
| PE01 | Entry into force 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: 20210119 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 |