CN114000513A - Assembled precast concrete hollow supporting beam - Google Patents
Assembled precast concrete hollow supporting beam Download PDFInfo
- Publication number
- CN114000513A CN114000513A CN202111319472.XA CN202111319472A CN114000513A CN 114000513 A CN114000513 A CN 114000513A CN 202111319472 A CN202111319472 A CN 202111319472A CN 114000513 A CN114000513 A CN 114000513A
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- Prior art keywords
- hollow
- precast concrete
- face
- section
- assembly type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011178 precast concrete Substances 0.000 title claims abstract description 22
- 244000035744 Hura crepitans Species 0.000 claims abstract description 25
- 230000007306 turnover Effects 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 239000004576 sand Substances 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 26
- 239000000463 material Substances 0.000 abstract description 6
- 238000003466 welding Methods 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses an assembly type precast concrete hollow supporting beam which comprises two bracket triangular plates fixed on the side surface of a supported object, a rotatable assembly type hollow combined beam with one end placed on the bracket triangular plates, and a telescopic sand box placed between the rotatable assembly type hollow combined beam and the supported object and used for transferring force and adjusting a gap. The turnover assembly type hollow composite beam comprises a plurality of prefabricated hollow beam sections, connecting end faces are arranged at two ends of each hollow beam section, and the connecting end faces between the hollow beam sections are fixedly connected through a plurality of bolts. The invention has the advantages of low construction cost, short construction period, convenient assembly and disassembly, repeated utilization, material saving and construction period.
Description
Technical Field
The invention relates to the technical field of foundation pit supporting inner supports, in particular to an assembled precast concrete hollow support beam.
Background
In the foundation construction of large buildings, a common supporting beam in a foundation pit supporting project is generally of a cast-in-place concrete structure and is generally a temporary support, so that the problems of high construction cost, long construction period, high dismantling difficulty and material and construction period waste are generally solved.
Disclosure of Invention
The invention aims to solve the problems of high construction cost, long construction period, high dismantling difficulty and material and construction period waste of the support beam in the existing foundation pit supporting engineering.
In order to solve the problems, the invention provides the fabricated precast concrete hollow support beam which is based on the modularized hollow combination beam, has low construction cost, short construction period, convenient assembly and disassembly, can be repeatedly utilized, and saves materials and construction period.
The fabricated precast concrete hollow supporting beam comprises two bracket triangular plates fixed on the side surface of a supported object, a rotatable fabricated hollow combination beam with one end placed on the bracket triangular plates, and a telescopic sand box placed between the rotatable fabricated hollow combination beam and the supported object and used for transferring force and adjusting a gap.
Further, the turnover assembly type hollow core composite beam comprises a plurality of prefabricated hollow core beam sections, connecting end faces are arranged at two ends of each hollow core beam section, and the connecting end faces between the hollow core beam sections are fixedly connected through a plurality of bolts.
Furthermore, the connecting end face comprises an end steel sleeve, a plurality of anchoring ribs which are implanted into the hollow beam section and welded with the end steel sleeve, a connecting flange which is welded with the end face of the end steel sleeve and provided with a bolt hole, and a plurality of triangular stiffening ribs are welded at the included angle between the connecting flange and the end steel sleeve.
Furthermore, the turnover assembly type hollow composite beam comprises three types of hollow beam sections, namely a straight end face hollow beam section, a single-side inclined end face hollow beam section, a four-end face fork-shaped hollow beam section and the like; the turnover assembly type hollow composite beam with three fork ends and a middle straight line beam is combined by a plurality of hollow beam sections of the three types.
Preferably, the adjusting sand box is customized by a wood-rubber plate with the thickness of 15mm, the thickness is 150-200mm, and the cross section dimension is the same as the dimension of the end face of the turnover assembly type hollow core combination beam; the upper end surface of the adjusting sand box is provided with a sand injection port, and the side surface of the adjusting sand box is provided with a sand discharge hole; during installation, after sand is filled in the sand box, the sand discharging hole is blocked by the wooden plug, and during disassembly, the wooden plug is pulled out to discharge the sand to finish load removal.
Preferably, the bracket triangle is made of a steel plate with the thickness of 10mm, and one side of the bracket triangle is welded with the embedded steel bars of the supported object.
Preferably, the hollow core beam segments are made of hollow concrete, so that the economical and portable support beam is convenient to hoist and mount.
Preferably, the three types of hollow beam sections, such as the straight-end hollow beam section, the single-side inclined-end hollow beam section, the four-end fork-shaped hollow beam section and the like, are prefabricated members, and the same or similar dimensions are selected in the length direction so as to facilitate the turnover performance of the hollow beam sections.
Preferably, the four-end-face fork-shaped hollow-core beam segment has round corners between two branch beams and a middle straight beam to prevent stress damage.
Preferably, the cross-section of the internal cavity of the hollow core beam segment is octagonal.
The fabricated precast concrete hollow supporting beam structure ensures that the fabricated precast concrete hollow supporting beam can be detached through the telescopic sand box. The assembly type precast concrete hollow supporting beam is prefabricated in segments, and prefabrication and turnover performance are guaranteed. The concrete support beam is of a hollow concrete structure, the support beam is light in weight, and the lifting and the installation are both light.
The assembled precast concrete hollow supporting beam provided by the patent embodiment of the invention has the following beneficial technical effects:
(1) the construction cost is low: the construction method has the advantages that the construction method is modularized and sectionally combined, and is repeatedly used by section, so that the construction cost is obviously reduced;
(2) the construction period is short: concrete pouring and field construction of the reinforcing steel bar net rack are not needed, and the combined installation construction period is short;
(3) convenient assembly and disassembly: the structure is simple, the installation is convenient, all hollow beam segments are connected through bolts, and the telescopic sand box is arranged between the hollow beam and the supported object, so that the production is simple and the assembly and disassembly are convenient;
(4) can be repeatedly used, saves materials and shortens the construction period: the modular sectional combination has consistent length, can be repeatedly assembled and disassembled for long-term use, and has the advantages of remarkably saving materials and construction period.
Drawings
FIG. 1 is a schematic view of the installation configuration of the present invention;
FIG. 2 is a plan view of a section of a hollow core composite beam of the present invention in a rotatable assembly configuration;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 in accordance with the present invention;
FIG. 4 is a side view of the collapsible flask of the present invention;
in the figure: 1. a crown beam; 2. supporting a pillar; 3. a bracket set square; 4. the assembled hollow composite beam can be rotated; 5. a collapsible flask; 6. hanging the ribs; 7. a wale; 8. a support pillar; 9. earthwork; 40. connecting the end faces; 41. a straight end face hollow core beam segment; 42. a single-side oblique end face hollow beam segment; 43. four-end-face fork-shaped hollow beam sections; 44. a bolt; 51. a sand discharge hole; 400. an interior cavity; 401. a steel sleeve at the end part; 402. anchoring ribs; 403. a connecting flange; 404. a triangular stiffener; 405. bolt holes; 431. and (4) rounding.
Detailed Description
The following further description of the embodiments with reference to fig. 1-4 and the specific examples is provided to facilitate the understanding of the present invention.
The technical solution in the patent embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the patent embodiment of the present invention.
As shown in figure 1, the invention provides an internal support structure in foundation pit supporting engineering, and provides an assembly type precast concrete hollow support beam, which comprises two bracket triangular plates 3 fixed on the side surfaces of support columns 2 below a crown beam 1, an assembly type hollow combination beam 4 with one end placed on the bracket triangular plates 3 and capable of being rotated, and a telescopic sand box 5 placed between the assembly type hollow combination beam 4 and the crown beam 1 and used for transferring force and adjusting a gap.
Preferably, the bracket triangle 3 is made of a steel plate with the thickness of 10mm, and one side of the bracket triangle is welded with the preset steel bar of the crown beam 1 through a hanging rib 6. The steel plate is welded with the steel bars pre-embedded in the crown beam 1, the welding length is 20cm, and the stress stability of the supporting beam is guaranteed.
As shown in fig. 2, the turnover assembly type hollow-core composite beam 4 comprises three types of hollow-core beam sections, namely a straight end-face hollow-core beam section 41, a single-side inclined end-face hollow-core beam section 42, a four-end-face fork hollow-core beam section 43 and the like; the turnover assembly type hollow composite beam with three fork ends and a middle straight line beam is combined by a plurality of hollow beam sections of the three types.
As shown in fig. 2, the turnover-fabricated hollow core composite beam 4 includes a plurality of prefabricated hollow core beam segments having connecting end surfaces 40 at both ends, and the connecting end surfaces between the hollow core beam segments are fixedly connected by a plurality of bolts 44.
As shown in fig. 2 and 3, the connecting end surface 40 includes an end steel sleeve 401, a plurality of anchoring ribs 402 embedded in the hollow beam section and welded to the end steel sleeve 401, a connecting flange 403 welded to the end surface of the end steel sleeve 401 and having bolt holes 405, and a plurality of triangular stiffening ribs 404 welded to the connecting flange 403 and the end steel sleeve 401 at an included angle.
Preferably, the hollow core beam segments are made of hollow concrete, so that the economical and portable support beam is convenient to hoist and mount.
Preferably, the three types of hollow beam sections, i.e., the straight-end hollow beam section 41, the single-side inclined-end hollow beam section 42, and the four-end fork-shaped hollow beam section 43, are prefabricated members, and the same or similar dimensions are selected in the length direction, so as to facilitate the turnover performance of the hollow beam sections.
Preferably, the four-ended wishbone hollow beam segment 43 has rounded corners 431 between the two side branch beams and the middle straight beam to prevent stress failure.
As shown in fig. 3, the hollow core beam segment internal cavity 400 is octagonal in cross-section.
As shown in fig. 4, the retractable sand box 5 is composed of two rectangular boxes with openings on one side, which are telescopically matched with each other, and is made of wood plywood with the thickness of 15mm, the thickness is 150-200mm, and the cross-sectional dimension is the same as the dimension of the end face of the assembly type hollow core combination beam 4 capable of being rotated; the upper end surface of the telescopic sand box 5 is provided with a sand injection port (not shown in the figure) for adding sand to bear load, and the side surface of the telescopic sand box is provided with a sand discharge hole 51; during installation, after the adjusting sand box is filled with sand, the sand discharging hole 51 is blocked by a wooden plug, and during disassembly, the wooden plug is pulled out to discharge the sand to finish load removal.
The assembly type hollow core combination beam 4 structure capable of being circulated ensures convenient disassembly through the telescopic sand box 5. The assembly type hollow composite beam 4 capable of being circulated is prefabricated in sections, and the structural forms of the three sections (see fig. 2) are the same, so that the prefabrication is facilitated, and the circulation convenience is improved. The turnover assembly type hollow composite beam is of a hollow concrete structure, the supporting beam is light in weight, and the lifting and the installation are both light. The segments are connected through the connecting end surfaces 40 of the segments of the support beam, and the stability is good.
In conclusion, the turnover assembly type hollow composite beam 4 is convenient to transport and mount. The requirement of the overall stability of the turnover assembly type hollow core composite beam after installation is met. And it can prefabricate and have enough to meet need the use, fine reduce the cost, reduced the construction interference, practiced thrift the time limit for a project.
The turnover assembly type hollow core composite beam 4 provided by the invention can also be used for supporting structures at other positions such as a waist beam 7 and the like.
The construction method of the fabricated precast concrete hollow support beam 1 (hereinafter referred to as the support beam 1) or the waist beam 7 comprises the following construction steps:
firstly, welding a hanging rib 6 on the crown beam steel bar at the joint position of the support beam 4 (waist beam 7) and the crown beam 1 to weld and fix the corbel steel plate 3 when the crown beam 1 steel bar is installed.
And step two, constructing the support columns 8 at the lower parts of the support beams 4 (waist beams 7).
And step three, excavating the earth of the foundation pit to the height of the bottom of the supporting beam 4 (waist beam 7), welding a bracket steel plate at the joint position of the supporting beam 4 (waist beam 7) and the top beam, installing a telescopic sand box 5 (wood plug plugging sand discharge hole) filled with sand and assembling and installing the supporting beam 4 (waist beam 7) segments, and driving a wood wedge between the telescopic sand box 5 and the supporting beam 4 (waist beam 7) to enable the top beam 1, the telescopic sand box 5 and the supporting beam 4 (waist beam 7) to be squeezed tightly and densely so as to transfer load.
And fourthly, continuously excavating the earthwork 9 of the foundation pit, increasing the lateral soil pressure of the foundation pit supporting pile 1 along with the excavation of the earthwork 9, and further tightly pressing the supporting beam 4, the telescopic sand box 5 and the crown beam 1 (waist beam 7) to play a supporting role.
And fourthly, knocking out the wooden wedge when the supporting beam 4 (waist beam 7) needs to be removed after the construction of the structure in the foundation pit is finished, removing the wooden plug on the side surface of the telescopic sand box 5, discharging sand, and hoisting the supporting beam 4 (waist beam 7) to enter the next section of the foundation pit for reinstallation for supporting.
The above description discloses only the preferred embodiment of the invention, and is not intended to limit the scope of the invention, so that all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. The utility model provides an assembled precast concrete hollow core supporting beam which characterized in that: the sand box comprises two bracket set squares fixed on the side surface of a supported object, a turnover assembly type hollow core combination beam with one end placed on the bracket set squares, and a telescopic sand box placed between the turnover assembly type hollow core combination beam and the supported object and used for transferring force and adjusting a gap.
2. A fabricated precast concrete hollow core support beam according to claim 1, wherein: the turnover assembly type hollow composite beam comprises a plurality of prefabricated hollow beam sections, connecting end faces are arranged at two ends of each hollow beam section, and the connecting end faces between the hollow beam sections are fixedly connected through a plurality of bolts.
3. A fabricated precast concrete hollow core support beam according to claim 2, wherein: the connecting end face comprises an end steel sleeve, a plurality of anchoring ribs implanted into the hollow beam section and welded with the end steel sleeve, a connecting flange with a bolt hole and welded with the end face of the end steel sleeve, and a plurality of triangular stiffening ribs are welded at included angles of the connecting flange and the end steel sleeve.
4. A fabricated precast concrete hollow core support beam according to claim 2, wherein: the assembly type hollow composite beam capable of being rotated comprises three types of hollow beam sections, namely a straight end face hollow beam section, a single-side inclined end face hollow beam section, a four-end face fork-shaped hollow beam section and the like; the turnover assembly type hollow composite beam with three fork ends and a middle straight line beam is combined by a plurality of hollow beam sections of the three types.
5. A fabricated precast concrete hollow core support beam according to claim 1, wherein: the adjusting sand box is customized by a wood-rubber plate with the thickness of 15mm, the thickness is 150-200mm, and the cross section dimension is the same as the dimension of the end face of the turnover assembly type hollow-core combination beam; the upper end surface of the adjusting sand box is provided with a sand injection port, and the side surface of the adjusting sand box is provided with a sand discharge hole; during installation, after sand is filled in the sand box, the sand discharging hole is blocked by the wooden plug, and during disassembly, the wooden plug is pulled out to discharge the sand to finish load removal.
6. A fabricated precast concrete hollow core support beam according to claim 1, wherein: the bracket triangle is made of a steel plate with the thickness of 10mm, and one side of the bracket triangle is welded with the embedded steel bar of the supported object.
7. A fabricated precast concrete hollow core support beam according to claim 3, wherein: the hollow beam section is made of hollow concrete, so that the economical and portable support beam is ensured, and the support beam is convenient to hoist and mount.
8. An assembled precast concrete hollow core support beam according to claim 4, wherein: the three types of hollow beam sections such as the straight end face hollow beam section, the single-side inclined end face hollow beam section, the four-end face fork-shaped hollow beam section and the like are prefabricated parts, and the same or similar size is selected in the length direction so as to facilitate the turnover performance of the hollow beam section.
9. An assembled precast concrete hollow core support beam according to claim 4, wherein: and round corners are arranged between the two side branch beams and the middle straight beam of the four-end-face fork-shaped hollow beam section so as to prevent stress damage.
10. An assembled precast concrete hollow core support beam as recited in claim 7, wherein: the cross section of the inner cavity of the hollow core beam segment is octagonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111319472.XA CN114000513A (en) | 2021-11-09 | 2021-11-09 | Assembled precast concrete hollow supporting beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111319472.XA CN114000513A (en) | 2021-11-09 | 2021-11-09 | Assembled precast concrete hollow supporting beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114000513A true CN114000513A (en) | 2022-02-01 |
Family
ID=79928355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111319472.XA Pending CN114000513A (en) | 2021-11-09 | 2021-11-09 | Assembled precast concrete hollow supporting beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114000513A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991170A (en) * | 2022-06-23 | 2022-09-02 | 中国水利水电第七工程局有限公司 | Hollow interlayer concrete-filled steel tube supporting system and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203530989U (en) * | 2013-09-28 | 2014-04-09 | 福建工程学院 | Deep foundation pit shoring retaining wall steel pipe concrete supporting assembly |
| CN203530990U (en) * | 2013-09-28 | 2014-04-09 | 福建工程学院 | Deep foundation pit shoring retaining wall steel pipe concrete supporting structure |
| CN105887892A (en) * | 2016-05-05 | 2016-08-24 | 中铁第四勘察设计院集团有限公司 | Steel pipe support structure for foundation pit construction |
| KR101953595B1 (en) * | 2018-07-10 | 2019-03-05 | (주)테스콤엔지니어링 | Modular strut reinforcement apparatus |
| CN210151754U (en) * | 2019-06-05 | 2020-03-17 | 中交一公局第三工程有限公司 | Adjustable joint and steel supporting structure |
-
2021
- 2021-11-09 CN CN202111319472.XA patent/CN114000513A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203530989U (en) * | 2013-09-28 | 2014-04-09 | 福建工程学院 | Deep foundation pit shoring retaining wall steel pipe concrete supporting assembly |
| CN203530990U (en) * | 2013-09-28 | 2014-04-09 | 福建工程学院 | Deep foundation pit shoring retaining wall steel pipe concrete supporting structure |
| CN105887892A (en) * | 2016-05-05 | 2016-08-24 | 中铁第四勘察设计院集团有限公司 | Steel pipe support structure for foundation pit construction |
| KR101953595B1 (en) * | 2018-07-10 | 2019-03-05 | (주)테스콤엔지니어링 | Modular strut reinforcement apparatus |
| CN210151754U (en) * | 2019-06-05 | 2020-03-17 | 中交一公局第三工程有限公司 | Adjustable joint and steel supporting structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991170A (en) * | 2022-06-23 | 2022-09-02 | 中国水利水电第七工程局有限公司 | Hollow interlayer concrete-filled steel tube supporting system and construction method thereof |
| CN114991170B (en) * | 2022-06-23 | 2023-06-13 | 中国水利水电第七工程局有限公司 | Hollow interlayer steel pipe concrete supporting system and construction method thereof |
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Application publication date: 20220201 |
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