CN108005081B - Combined triangular piece and foundation pit inner support applying same - Google Patents
Combined triangular piece and foundation pit inner support applying same Download PDFInfo
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- CN108005081B CN108005081B CN201711086706.4A CN201711086706A CN108005081B CN 108005081 B CN108005081 B CN 108005081B CN 201711086706 A CN201711086706 A CN 201711086706A CN 108005081 B CN108005081 B CN 108005081B
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- 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
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Abstract
The invention discloses a combined triangular piece and an inner foundation pit support using the same, and aims to provide the combined triangular piece which is convenient to mount, can be correspondingly adjusted according to the width of a support beam in profile steel and has good universality. The combined triangular piece comprises an integrated inner core, and the integrated inner core comprises a bottom side profile steel and a triangular convex inner core arranged on the bottom side profile steel; and at least one section steel combination layer which is sequentially distributed on the outer side of the triangular raised inner core from inside to outside, wherein the section steel combination layer and the triangular raised inner core form a triangular raised support together on one side of the bottom side section steel. The foundation ditch inner support includes prestressing force pressurization piece, sets up the combination formula three-angle parts on enclosing the roof beam medial surface and is located an interior supporting beam of shaped steel that encloses the roof beam, and a first end of an interior supporting beam of shaped steel supports on the outer waist limit shaped steel of combination formula three-angle parts, and a second end of an interior supporting beam of shaped steel supports on the medial surface that encloses the roof beam through prestressing force pressurization piece.
Description
Technical Field
The invention relates to a foundation pit supporting structure, in particular to a combined triangular piece and a foundation pit inner support using the same.
Background
In order to ensure the safety of the underground structure and the surrounding environment of the foundation pit, protective measures such as supporting and reinforcing are required to be adopted on the side wall and the periphery of the foundation pit. Present foundation ditch braced system is including enclosing the foundation ditch fender pile that sets up around the foundation ditch edge usually, being located the inboard foundation ditch that encloses the axle beam of foundation ditch fender pile and setting in enclosing the foundation ditch inner support between the axle beam. Support in the foundation ditch usually including fixing at the inboard triangle piece of enclosing the axle beam and through the triangle piece to propping a supporting beam in the shaped steel between enclosing the axle beam, wherein a supporting beam in the shaped steel is through hydraulic jack application prestressing force to propping between the purlin roof beam that encloses of opposite both sides to this forms the support to the foundation ditch, guarantees foundation ditch braced system's support intensity.
The existing triangular piece for supporting the foundation pit is usually an integrated triangular piece, and the integrated triangular piece has large remedial weight (reaching 4-5 tons), so that the installation is inconvenient; and the triangle of integral type usually matches with the shaped steel inner strut beam of specific width, can't carry out corresponding adjustment according to the width of shaped steel inner strut beam, and the commonality is not good.
On the other hand, before the support beam in the shaped steel is installed in the current foundation pit, a bracket needs to be erected below the support beam in the shaped steel, and the bracket usually comprises two shaped steel upright columns fixed on the bottom surface of the foundation pit and a support cross beam arranged on the upper portions of the shaped steel upright columns and used for supporting the support beam in the shaped steel. The existing profile steel inner supporting beam is supported by a bracket before prestress is applied to the surrounding purlin beam, the horizontal position state of the profile steel inner supporting beam supported on the bracket cannot be guaranteed, the profile steel inner supporting beam is easy to incline, and after the profile steel inner supporting beam is inclined and supported on the surrounding purlin beam by applying prestress through a jack, the axial force of the profile steel inner supporting beam to the supporting purlin beam is inclined and is not on a horizontal straight line; thereby reducing the supporting capacity of the supporting beam in the profile steel to the foundation pit and the supporting stability.
Disclosure of Invention
The invention aims to provide a combined triangular piece which is convenient to install, can be adjusted according to the width of a support beam in a section steel and has good universality.
The invention also aims to solve the problems that in the prior art, the horizontal position state of the inner supporting beam of the section steel supported by the bracket cannot be ensured, the inner supporting beam of the section steel is easy to incline, and the supporting capability and the supporting stability of the inner supporting beam of the section steel on the foundation pit are reduced, and the inner supporting beam of the section steel can be supported between the purlin enclosing beams in a horizontal state, so that the supporting capability and the supporting stability of the inner supporting beam of the section steel on the foundation pit are ensured.
The technical scheme of the invention is as follows:
a modular triangle, comprising: the integrated inner core comprises a bottom profile steel and a triangular raised inner core arranged on the bottom profile steel; and at least one layer of profile steel combination layer which is distributed outside the triangular raised inner core from inside to outside in sequence, wherein the same profile steel combination layer comprises two outer waist profile steels, the two outer waist profile steels on the same profile steel combination layer are in a V shape, the profile steel combination layer and the triangular raised inner core jointly form a triangular raised support on one side of the base profile steel, and the profile steel combination layer and the triangular raised inner core are in one layer of profile steel combination layer adjacent to the triangular raised inner core: the outer waist-side section steel is tightly leaned against the side edge of the triangular convex inner core, and the outer waist-side section steel is connected with the triangular convex inner core through a bolt; in two adjacent layer shaped steel composite layers: the outer waist-side section steel of the section steel combination layer positioned on the outer side is connected with the outer waist-side section steel of the section steel combination layer positioned on the inner side through bolts.
The outer waist profile steel of the profile steel combination layer is provided with the triangular protruding inner core through the bolts, so that when the combined type triangular piece is installed, the profile steel combination layer can be detached, the integrated inner core is installed on the inner side surface surrounding the beam, the number of layers of the profile steel combination layer is selected according to the actual width of the profile steel inner supporting beam, and the profile steel combination layer is installed layer by layer; thus, the weight of each installation can be greatly reduced, and the actual installation is convenient; on the other hand, because the outer waist side section steel of shaped steel composite bed passes through bolt and the protruding inner core of triangle-shaped, can select the number of piles on shaped steel composite bed according to the actual width of shaped steel internal support beam, and then adjust the length of the waist side of the protruding support of triangle-shaped and the actual width phase-match of shaped steel internal support beam, the commonality is good.
Preferably, the outer waist profile steel is connected with the bottom profile steel through bolts.
Preferably, both ends of the outer waist-side profile steel are provided with end enclosure plates.
Preferably, the triangular protruding inner core is composed of two inner waist-side section steels arranged on the bottom-side section steel, the inner waist-side section steels are connected with the bottom-side section steel through welding, and the two inner waist-side section steels are connected through welding.
Preferably, the bottom edge profile steel and the outer waist edge profile steel are both H-shaped steel.
The utility model provides an use foundation ditch inner support of combination formula three-angle piece, includes prestressing force pressurization piece, sets up the combination formula three-angle piece on enclosing the roof beam medial surface and be located the shaped steel internal supporting beam that encloses the axle beam, a first end of supporting beam supports on the outer waist limit shaped steel of combination formula three-angle piece in the shaped steel, a second end of supporting beam supports on the medial surface that encloses the axle beam through prestressing force pressurization piece in the shaped steel, prestressing force pressurization piece is including two support elements that can strut each other, and one of them support element butt is on the medial surface that encloses the axle beam, and another support element butt is served at the second of angle to the support beam.
Preferably, the foundation pit supporting device further comprises a bracket assembly for supporting the supporting beam in the section steel, wherein the bracket assembly comprises two section steel brackets arranged on the foundation pit retaining pile, the two section steel brackets are positioned at the same height, one section steel bracket is positioned below the first end of the supporting beam in the section steel, and the other section steel bracket is positioned below the second end of the supporting beam in the section steel; the section steel bracket comprises a horizontal guide rail parallel to the section steel inner support beam, a supporting slide seat sliding along the horizontal guide rail and a balance supporting device arranged on the supporting slide seat, the balance supporting device comprises a vertical cylinder body arranged on the upper end surface of the supporting sliding seat, a supporting piston body arranged in the vertical cylinder body in a sliding way, a piston limiting block arranged on the inner side surface of the vertical cylinder body and positioned below the supporting piston body, a vertical supporting column arranged on the upper end surface of the supporting piston body and a balance supporting beam arranged at the upper end of the vertical supporting column, a balance interface is arranged on the lower portion of the outer side face of the vertical cylinder body and below the piston limiting block, a switch valve is arranged on the balance interface, a support pillar through hole is formed in the upper end face of the vertical cylinder body, the vertical support pillar penetrates through the support pillar through hole, the balance support beam is arranged above the vertical cylinder body, and the balance support beam is parallel to the support cross beam; the balance interfaces on the vertical cylinder bodies on the two section steel brackets are connected through a balance connecting pipe; the steel section inner supporting beam is supported on the balance supporting beam of the two steel section brackets.
This scheme structure can guarantee that a supporting beam is to propping between enclosing the purlin roof beam with the horizontality in the shaped steel, avoids supporting beam's in the shaped steel that supports through the bracket horizontal position state can't obtain guaranteeing, and the easy slope that takes place of supporting beam in the shaped steel reduces the problem of a supporting beam to the support ability of foundation ditch and the stability of support in the shaped steel.
The invention has the beneficial effects that:
firstly, not only be convenient for install, carry out corresponding adjustment according to the width of a supporting beam in the shaped steel moreover, the commonality is good.
And secondly, the supporting beam in the profile steel can be supported between the enclosing purlin beams in a horizontal state, so that the supporting capability and the supporting stability of the supporting beam in the profile steel to the foundation pit are ensured.
Drawings
Fig. 1 is an exploded view of the assembled triangle of example 1 of the present invention.
FIG. 2 is an assembled view of a combination cam in example 1 of the present invention.
Fig. 3 is a schematic structural view of an inner support for a foundation pit according to embodiment 2 of the present invention.
FIG. 4 is a schematic view showing the structure of a steel pallet according to example 2 of the present invention.
Fig. 5 is a schematic view of a partial cross-sectional structure at a-a in fig. 4.
In the figure:
a foundation pit fender post 1 a; enclosing a beam 1 b;
the combined triangular piece comprises a combined triangular piece 1, an integrated inner core 1.1, a bottom edge section steel 1.11, a triangular raised inner core 1.12, a section steel combination layer 1.2 and an outer waist edge section steel 1.21;
a section steel inner support beam 2; a prestressing force pressing member 3;
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
example 1: as shown in fig. 1 and 2, a combined triangular component includes an integral inner core 1.1 and at least one section steel combination layer 1.2 sequentially distributed from inside to outside on the outer side of the triangular convex inner core, in this embodiment: the section steel combination layer is three layers.
The integrated inner core comprises a bottom side section steel 1.11 and a triangular convex inner core 1.12 arranged on the bottom side section steel. The triangular convex inner core is composed of two inner waist edge section steels arranged on the bottom edge section steel, the inner waist edge section steels are connected with the bottom edge section steel through welding, and the two inner waist edge section steels are connected through welding. The bottom edge section steel and the inner waist edge section steel are both H-shaped steel.
The same section steel combination layer comprises two outer waist section steels 1.21, and the two outer waist section steels of the same section steel combination layer are V-shaped. The outer waist profile steel is H-shaped steel. The profile steel combination layer and the triangular convex inner core are jointly arranged on one side of the profile steel at the bottom side to form a triangular convex support.
In the layer of profile steel combination layer adjacent to the triangular convex inner core: the outer waist-side section steel is tightly leaned on the side edge of the triangular convex inner core, and the outer waist-side section steel is connected with the triangular convex inner core through a bolt.
In two adjacent layer shaped steel composite layers: the outer waist-side section steel of the section steel combination layer positioned on the outer side is connected with the outer waist-side section steel of the section steel combination layer positioned on the inner side through bolts.
The outer waist edge section steel is connected with the bottom edge section steel through bolts. And end plate heads are arranged at two ends of the outer waist edge profile steel.
When the combined type triangular piece is installed, the integrated inner core is installed on the inner side surface of the enclosing element beam through the bottom edge section steel, and the bottom edge section steel is connected with the enclosing element beam through a bolt; then, selecting the number of layers of the section steel combination layer according to the actual width of the support beam in the section steel, and mounting the section steel combination layer by layer; therefore, the bearing weight of each installation step can be greatly reduced, and the actual installation is convenient.
Example 2: as shown in fig. 3, an inner support for foundation pit comprises a prestress pressurizing part 3, a combined type triangular part 1 arranged on the inner side surface of an enclosing element beam 1b, a profile steel inner supporting beam 2 positioned in the enclosing element beam and a bracket component for supporting the profile steel inner supporting beam. The concrete structure of the combined triangle of the present embodiment refers to embodiment 1. The combined triangle element is arranged on the inner side surface of the enclosing beam through the bottom side profile steel.
The bracket assembly comprises two steel brackets 4 arranged on the foundation pit fender post 1 a. The foundation pit fender pile of this embodiment comprises the shaped steel stand. Two shaped steel brackets are located same height, and one of them shaped steel bracket is located the below of the first end of a supporting beam in the shaped steel, and another shaped steel bracket is located the below of the second end of a supporting beam in the shaped steel.
The first end of the section steel inner supporting beam is propped against the section steel at the outer waist edge of the combined triangular piece. The second end of the supporting beam in the profile steel is propped against the inner side surface of the enclosing beam through the prestress pressurizing piece. The prestress pressing part comprises two supporting parts which can be mutually propped, one of the supporting parts abuts against the inner side surface of the enclosing beam, and the other supporting part abuts against the second end of the angle pair supporting beam.
As shown in fig. 3, 4 and 5, the steel section bracket comprises a horizontal guide rail 5 parallel to the inner support beam of the steel section, a support slide 6 sliding along the horizontal guide rail, and a balance support device 7 arranged on the support slide.
The balance supporting device comprises a vertical cylinder body 7.1 arranged on the upper end face of the supporting sliding seat, a supporting piston body 7.3 arranged in the vertical cylinder body in a sliding mode, a piston limiting block 7.4 arranged on the inner side face of the vertical cylinder body and located below the supporting piston body, a vertical supporting column 7.5 arranged on the upper end face of the supporting piston body and a balance supporting beam 7.2 arranged at the upper end of the vertical supporting column. And a balance interface 7.6 is arranged below the piston limiting block and on the lower part of the outer side surface of the vertical cylinder body, and is communicated with the inner cavity of the vertical cylinder body. The balance interface is provided with a switch valve 7.7. The up end of vertical cylinder body is equipped with the support column via hole, and vertical support column passes the support column via hole. The balance supporting beam is positioned above the vertical cylinder body, the balance supporting beam is horizontally arranged, and the balance supporting beam is vertical to the horizontal guide rail.
The balance interfaces on the vertical cylinder bodies on the two section steel brackets are connected through a balance connecting pipe, and oil is filled in the vertical cylinder bodies below the supporting piston bodies and the connecting pipes.
The steel section inner supporting beam is supported on the balance supporting beam of the two steel section brackets. The symmetry centers of the balance support beams of the two section steel brackets coincide with the symmetry center of the balance support beam in the section steel (i.e., the distance between the first end of the balance support beam in the section steel and the balance support beam of one section steel bracket is the same as the distance between the second end of the balance support beam in the section steel and the balance support beam of the other section steel bracket).
The concrete installation steps of the foundation pit inner support of the embodiment are as follows:
firstly, opening a switch valve at a balance interface;
the structural steel inner supporting beam is supported on the balance supporting beams of the two structural steel brackets, and the balance interfaces on the vertical cylinder bodies on the two structural steel brackets are connected through the balance connecting pipes, so that the position state of the structural steel inner supporting beam can be adjusted by utilizing the principle of a communicating vessel, and when the structural steel inner supporting beam is stable, the structural steel inner supporting beam is in a horizontal position state;
and secondly, the switch valve at the balanced interface is closed, so that the support beam in the profile steel is kept in a horizontal position state, the support beam in the profile steel is guaranteed to be supported between the enclosing purlin beams in a horizontal state, the horizontal position state of the support beam in the profile steel which is prevented from being supported by the bracket is not guaranteed, the support beam in the profile steel is easy to incline, and the problem of the support capability and the support stability of the support beam in the profile steel to the foundation pit is solved.
Thirdly, pushing the first end of the inner supporting beam of the section steel to the surrounding purlin beam to enable the first end of the inner supporting beam of the section steel to be abutted against the outer waist-side section steel of the combined triangular piece; then, the two supporting parts of the prestress pressurizing part are propped open through the hydraulic jack, and then the inserting piece is inserted between the two supporting parts to keep the two supporting parts in a propped-open state, so that the supporting beam in the profile steel is propped between the surrounding purlin beams on the two opposite sides, a foundation pit is supported through the supporting beam, and the supporting strength of a foundation pit supporting system is guaranteed.
Claims (5)
1. An interior foundation pit support comprising a modular triangular member, the modular triangular member comprising:
the integrated inner core comprises a bottom profile steel and a triangular raised inner core arranged on the bottom profile steel; and
at least one section steel combination layer which is sequentially distributed on the outer side of the triangular raised inner core from inside to outside, the same section steel combination layer comprises two outer waist section steels, the two outer waist section steels on the same section steel combination layer are V-shaped, the section steel combination layer and the triangular raised inner core jointly form a triangular raised support on one side of the bottom section steel,
in the layer of profile steel combination layer adjacent to the triangular convex inner core: the outer waist-side section steel is tightly leaned against the side edge of the triangular convex inner core, and the outer waist-side section steel is connected with the triangular convex inner core through a bolt;
in two adjacent layer shaped steel composite layers: the outer waist profile steel of the profile steel combination layer positioned on the outer side is connected with the outer waist profile steel of the profile steel combination layer positioned on the inner side through bolts;
the combined triangular piece is arranged on the inner side surface of the purlin enclosing beam, a first end of the steel inner supporting beam abuts against the steel on the outer waist side of the combined triangular piece, a second end of the steel inner supporting beam abuts against the inner side surface of the purlin enclosing beam through the prestress pressurizing piece, the prestress pressurizing piece comprises two supporting parts which can be mutually supported, one supporting part abuts against the inner side surface of the purlin enclosing beam, and the other supporting part abuts against the second end of the steel inner supporting beam;
the bracket assembly comprises two profile steel brackets arranged on the foundation pit fender post, wherein one profile steel bracket is positioned below the first end of the support beam in the profile steel, and the other profile steel bracket is positioned below the second end of the support beam in the profile steel;
the section steel bracket comprises a horizontal guide rail parallel to the section steel inner support beam, a supporting slide seat sliding along the horizontal guide rail and a balance supporting device arranged on the supporting slide seat, the balance supporting device comprises a vertical cylinder body arranged on the upper end surface of the supporting sliding seat, a supporting piston body arranged in the vertical cylinder body in a sliding way, a piston limiting block arranged on the inner side surface of the vertical cylinder body and positioned below the supporting piston body, a vertical supporting column arranged on the upper end surface of the supporting piston body and a balance supporting beam arranged at the upper end of the vertical supporting column, a balance interface is arranged on the lower portion of the outer side face of the vertical cylinder body and below the piston limiting block, a switch valve is arranged on the balance interface, a support pillar through hole is formed in the upper end face of the vertical cylinder body, the vertical support pillar penetrates through the support pillar through hole, the balance support beam is arranged above the vertical cylinder body, and the balance support beam is perpendicular to the horizontal guide rail;
the balance interfaces on the vertical cylinder bodies on the two section steel brackets are connected through a balance connecting pipe;
the profile steel inner supporting beam is supported on the balance supporting beams of the two profile steel brackets, and the symmetry centers of the balance supporting beams of the two profile steel brackets are superposed with the symmetry center of the profile steel inner supporting beam.
2. The foundation pit support of claim 1, wherein the outer waist section steel is connected to the bottom section steel by bolts.
3. The foundation pit support according to claim 1, wherein both ends of the outer waist-side steel are provided with end plate heads.
4. The foundation pit support according to claim 1, 2 or 3, wherein the triangular protruding inner core is composed of two inner waist-side section steels arranged on the bottom-side section steel, the inner waist-side section steels are connected with the bottom-side section steel through welding, and the two inner waist-side section steels are connected through welding.
5. The foundation pit support according to claim 1, 2 or 3, wherein the bottom side profile steel and the outer waist side profile steel are both H-shaped steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086706.4A CN108005081B (en) | 2017-11-07 | 2017-11-07 | Combined triangular piece and foundation pit inner support applying same |
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| CN201711086706.4A CN108005081B (en) | 2017-11-07 | 2017-11-07 | Combined triangular piece and foundation pit inner support applying same |
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| CN108005081B true CN108005081B (en) | 2020-07-07 |
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| CN111549786B (en) * | 2020-04-17 | 2021-06-08 | 浙江吉通地空建筑科技有限公司 | Detachable concave embedded type foundation pit inner supporting structure |
| CN113266079B (en) * | 2021-06-11 | 2022-12-02 | 浙江明思特建筑支护技术有限公司 | Shaped steel with high joint strength |
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| WO2007058463A1 (en) * | 2005-11-16 | 2007-05-24 | Supportec Co., Ltd. | Apparatus for fixing a wale |
| CN104179194A (en) * | 2014-07-22 | 2014-12-03 | 中建五局土木工程有限公司 | Integrated pipe trench in soft soil stratum and construction method of integrated pipe trench |
| CN204662458U (en) * | 2015-05-26 | 2015-09-23 | 东通岩土科技（杭州）有限公司 | Detachable pretightning force combined support frame system brace summer transition Connection Block |
| CN106948848A (en) * | 2017-05-11 | 2017-07-14 | 安徽科信矿山机械制造有限公司 | A kind of mine horizontal hydraulic pressure support |
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Address after: 310000 Room 1101, 6 Blocks, Chuangzhi Green Valley Development Center, Jianggan District, Hangzhou City, Zhejiang Province Applicant after: Dongtong Geotechnical Technology Co., Ltd. Address before: 310000 East Hangzhou Building, 59 Chengxing Road, Jianggan District, Hangzhou City, Zhejiang Province, 27th Floor Applicant before: Dongtong Geotechnical Technology (Hangzhou) Co., Ltd. |
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