CN203361163U - Prestress steel support used for controlling differential displacement inside and outside foundation ditch enclosure wall - Google Patents
Prestress steel support used for controlling differential displacement inside and outside foundation ditch enclosure wall Download PDFInfo
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- CN203361163U CN203361163U CN 201320378768 CN201320378768U CN203361163U CN 203361163 U CN203361163 U CN 203361163U CN 201320378768 CN201320378768 CN 201320378768 CN 201320378768 U CN201320378768 U CN 201320378768U CN 203361163 U CN203361163 U CN 203361163U
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- differential displacement
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Abstract
The utility model provides a prestress steel support used for controlling differential displacement inside and outside a foundation ditch enclosure wall. The enclosure wall is composed of a plurality of vertical reinforced concrete underground diaphragm walls and is connected with the steel support formed by combination of a plurality of pieces of H-shaped steel with square cross sections. A loader used for applying prestress or maintaining prestress is arranged in the steel support. The H-shaped steel is arranged on the two sides of a joint between two adjacent underground diaphragm walls and is connected with the underground diaphragm walls. The numbers of H-shaped steel connected to each underground diaphragm wall are identical. The prestress steel support used for controlling the differential displacement inside and outside the foundation ditch enclosure wall has the advantages of being large in rigidity, light in deformation, capable of controlling the differential displacement and deformation of adjacent enclosure walls and making construction convenient, recyclable and the like.
Description
Technical field
The utility model relates to technical field of civil engineering, and particularly the inner supporting structure of deep foundation pit support, to reduce the distortion of foundation ditch, protect the safety of Excavation Process surrounding enviroment.
Background technology
In the Soft Soil Foundation Pit engineering, the deep foundation ditch in subway, tunnel especially, its vertical space enclosing structure adopts steel concrete diaphragm wall, its horizontal support Common Steels braced structures.Steel supports the material used and mainly contains steel pipe, shaped steel.Installation for steel pipe support is that each root is installed respectively, apply respectively prestressing force, generally on the diaphragm wall of a width 6m length, 2 or 4 (2 side by side) steel pipe supports are installed, the installation of supporting due to steel on two adjacent width diaphragm walls and to apply prestressing force asynchronous, reality also is difficult to synchronous, cause two width diaphragm walls to produce relative displacement in joint, make the joint of water shutoff difficulty mutually again be pulled open, generation, than large fracture, causes that gushing water gushes the sand accident and constantly occurs herein.Because the water outlet shutoff in underground continuous wall connector gap is very difficult, in order to reduce the joint gap, constantly change the type of attachment of joint, consumed great deal of steel, but effect still is difficult to guarantee, this be mainly because, when to steel, prestressing force loading and steel support stress deformation are carried out in support, two width diaphragm walls are nonsynchronous, what current steel pipe support Prestressing mode adopted in addition is active alliteration wedge method, prestressed dissipation amount is difficult to determine, cause the actual prestress value of every steel pipe support to differ larger, thereby the prestressing force that adjacent two width diaphragm walls are subject to is also different, show that the joint between adjacent diaphragm wall is opened, produce larger gap.
Such structural shape, when local pressure is larger, the bearing capacity that single shape steel tube supports is difficult to reach requirement, can adopt the double combined support form, but the connection between these two shaped steel still can't form a combining structure, and its support rigidity is difficult to guarantee.
With reinforced concrete support, compare, steel supports the advantage such as have recyclable, recycling, easy for installation and construction period is short, but the cross section that steel supports is little, the low pre-stress construction that reaches of support rigidity is difficult to guarantee to be the main cause that limits its range of application, in order to enlarge its range of application, control better the distortion of foundation ditch and the differential displacement between enclosure wall, it is very urgent adopting new steel structure to support, and also meets the existing industrial policy of China fully.
The utility model content
Technical problem to be solved in the utility model is, overcome the shortcoming that in existing pattern foundation pit supporting structure, steel support structure form and mounting method etc. exist, provide a kind of prestress steel of controlling the inside and outside differential displacement of enclosure wall to support, can increase contact and the special charger of steel between supporting and apply prestressing force, two or many steel are supported can synchronous stressed and integrated carryings.
In order to address the above problem, the technical solution of the utility model is such:
The control bracing of foundation pit prestress steel of outer differential displacement within the walls supports, and enclosure wall is comprised of several vertical reinforcement concrete underground continuous walls, is connected with many group steel on enclosure wall and supports, and it is characterized in that, organizes the H shaped steel combination that the steel support is rectangle by many sections more and forms; Between many H shaped steel, adopt junction plate and/or scissor tie-beam to connect, junction plate and/or scissor tie-beam are bolted on the frange plate of H shaped steel; During supporting, every group of steel be provided with for applying prestressing force or keeping prestressed loader; Described H shaped steel be arranged in two width diaphragm walls seam crossing both sides and with diaphragm wall, be connected, the H shaped steel quantity connected on every width diaphragm wall is identical or equal.
Described H shaped steel cross section is square.
H shaped steel below is provided with column, and column is connected the steel brace summer with crossbeam by bracket.
Be provided with pre-embedded bolt on described enclosure wall, H shaped steel connects enclosure wall by pre-embedded bolt.
Be distributed with the bolt hole that connects use on H shaped steel.
The described loader be arranged on H shaped steel, H shaped steel crossbeam and box-shaped connector by many root beads by the multiple tracks stiffener form; Between H shaped steel crossbeam and box-shaped connector, with bolt, be connected.
Be provided with the packaged type jack in loader.
Be provided with the fixed jack of self-locking in loader.
The job practices that the prestress steel of this kind of inside and outside differential displacement of control enclosure wall supports is:
The first step a: junction steel plate is installed on enclosure wall, is distributed with the bolt hole be connected with brace summer one end on steel plate;
Junction steel plate is connected with enclosure wall by pre-embedded bolt or junction steel plate is connected with enclosure wall with welding manner;
Second step: steel is supported and is arranged on the upright supports crossbeam and uses junction plate to be connected with the scissors tie-beam;
The 3rd step: with the steel plate cushioning of different-thickness, the bearing length variation caused to regulate the enclosure wall construction error; The two ends that steel is supported are connected with bolt with the junction steel plate of installing on enclosure wall or support and junction steel plate welding;
The 4th step: special-purpose loading connector is set on steel supports, and applies prestressing force; It applies prestressed method a kind of is that the self-locking jack is installed on the position of supporting at steel, locks after applying prestressing force.On the close position supported at steel during another kind method, jack is installed, is locked prestressing force after applying prestressing force, then will load with jack and remove;
After foundation pit supporting project completes, can follow these steps to remove and recycling:
The first step: utilize the jack of loader, apply active force, between prestressing force lock box and prestressing force transfer beams, eject gap, remove the prestressing force lock box;
Second step: to the jack release, the prestressing force that the removal steel supports;
The 3rd step: remove steel and support being connected between two ends and bracing of foundation pit wall;
The 4th step: steel supporting component overall pulling down from foundation ditch is hung out;
The 5th step; The steel supporting component of removing all can be applied to another pattern foundation pit supporting structure, realizes the recycling of this backing material.
Beneficial effect, this combination steel support synchronous stressed and have rigidity large, be out of shape little, reduce adjacent enclosure wall and produce differential displacement and distortion, when somewhere enclosure wall deformation displacement is larger, regulate prestressing force, the displacement that can reduce or recover enclosure wall; The advantages such as this combination steel Construction of Supporting convenience, recyclable recycling, reached the purpose of reduction of erection time, reduction construction costs.
The accompanying drawing explanation
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is that the steel support is comprised of two H shaped steel and prestressing force locks the form of structure schematic diagram that adopts lock box.
Fig. 2 is that the steel support is comprised of four H shaped steel and prestressing force locks the form of structure schematic diagram that adopts lock box.
Fig. 3 is that the steel support is comprised of two H shaped steel and prestressing force locks the form of structure schematic diagram that adopts the self-locking jack.
Fig. 4 is that the steel support is comprised of four H shaped steel and prestressing force locks the form of structure schematic diagram that adopts the self-locking jack.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Shaped steel 2 is high-strength H shaped steel, is distributed with the bolt hole that connects use on shaped steel.The many groups of bolt hole are a plurality of, can meet the different demands that connect.Concrete junction plate 3 and the scissors tie-beam 31 of being equipped with on top flange plate, connected mode is for being bolted.
Load jack 5 for applying prestressing force, jack can adopt movable jack, uses movable jack, locks prestressing force after loaded, and jack can remove.
Load jack 5 for applying prestressing force, jack can adopt fixedly jack of self-locking, uses the fixed jack of self-locking, after loaded, by self-locking device, locks prestressing force.
Prestressing force lock box 51 is bolted prestressing force and loads transfer beam 4.
Shaped steel 2 belows are provided with column 6, and column 6 is connected shaped steel 2 by bracket 61 with crossbeam 62.
Referring to Fig. 2, this organizes steel support structure mainly by four shaped steel 2, junction plate 3, and scissors tie-beam 31, prestressing force loads transfer beam 4, loads jack 5 and prestressing force lock box 51 and forms.Four shaped steel are distributed in the seam both sides of two width diaphragm walls, are arranged symmetrically with.All the other are with embodiment 1.
Referring to Fig. 3, this organizes steel support structure mainly by two shaped steel 2, junction plate 3, and scissors tie-beam 31, prestressing force loads transfer beam 4, and self-locking loads jack 5 and forms.Two shaped steel are distributed in the seam both sides of two width diaphragm walls, are arranged symmetrically with.All the other are with embodiment 1.
Referring to Fig. 4, this organizes steel support structure mainly by four type steel support beams 2, junction plate 3, and scissors tie-beam 31, prestressing force loads transfer beam 4, and self-locking loads jack 5 and forms.Four shaped steel are distributed in the seam both sides of two width diaphragm walls, are arranged symmetrically with.All the other are with embodiment 1.
Referring to Fig. 1,2,3,4, the two ends of shaped steel 2 are connected with enclosure wall 1 respectively, and the connecting sewing 11 between enclosure wall is positioned at the centre of every group of steel support structure.
Steel described in the utility model supports, and is distributed in symmetrically on two adjacent width diaphragm walls, can effectively guarantee the uniformity of enclosure wall, prevents local distortion.This steel supports and connects by pre-embedded bolt, connects reliably, can bear pressure.
Steel supports can be used as support, angle brace, oblique throwing support is applied in pattern foundation pit supporting structure.Centered by the foundation ditch type, island formula or subway station are built foundation ditch etc.
Concrete mounting method is as follows:
The first step a: junction steel plate is installed on enclosure wall, is distributed with the bolt hole be connected with brace summer one end on steel plate;
Junction steel plate is connected with enclosure wall by pre-embedded bolt or junction steel plate is welded on enclosure wall;
Second step: steel is supported and is arranged on the upright supports crossbeam and uses junction plate to be connected with the scissors tie-beam;
The 3rd step: the two ends that steel is supported are connected with bolt with the junction steel plate of installing on enclosure wall, with the steel plate cushioning of different-thickness, and the bearing length variation caused to regulate the enclosure wall construction error;
The 4th step: special-purpose loading connector is set on brace summer, and applies prestressing force.It applies prestressed method a kind of is that the self-locking jack is installed on the position of brace summer, locks after applying prestressing force.On the close position of brace summer, jack is installed during another kind method, is locked prestressing force by lock box after applying prestressing force, then will load with jack and remove.
By above-mentioned steps and mounting method, make adjacent enclosure wall synchronously stressed, reduce differential displacement and distortion.
After foundation pit supporting project completes, can follow these steps to remove and recycling.
The first step: utilize and load prestressed jack, apply active force, between prestressing force lock box and prestressing force transfer beams, eject gap, remove the prestressing force lock box,
Second step: to the jack release, the prestressing force on removal steel brace summer;
The 3rd step: remove steel and support being connected between two ends and bracing of foundation pit wall;
The 4th step: Steel section member overall pulling down from foundation ditch is hung out;
The 5th step; The steel supporting component of removing all can be applied to another pattern foundation pit supporting structure, realizes the recycling of this backing material.
Above demonstration and described basic principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not subject to the restriction of above-mentioned example; that in above-mentioned example and manual, describes just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (8)
1. control the bracing of foundation pit prestress steel support of outer differential displacement within the walls, enclosure wall is comprised of several vertical reinforcement concrete underground continuous walls, be connected with many group steel on enclosure wall and support, it is characterized in that, organize the H shaped steel combination that the steel support is rectangle by many sections more and form; Between many H shaped steel, adopt junction plate and/or scissor tie-beam to connect, junction plate and/or scissor tie-beam are bolted on the frange plate of H shaped steel; During supporting, every group of steel be provided with for applying prestressing force or keeping prestressed loader; Described H shaped steel be arranged in two width diaphragm walls seam crossing both sides and with diaphragm wall, be connected, the H shaped steel quantity connected on every width diaphragm wall is identical or equal.
2. the control bracing of foundation pit according to claim 1 prestress steel support of outer differential displacement within the walls is characterized in that described H shaped steel cross section is square.
3. the control bracing of foundation pit according to claim 1 prestress steel support of outer differential displacement within the walls is characterized in that H shaped steel below is provided with column, and column is connected the steel brace summer with crossbeam by bracket.
4. the control bracing of foundation pit according to claim 1 prestress steel support of outer differential displacement within the walls is characterized in that be provided with pre-embedded bolt on described enclosure wall, H shaped steel connects enclosure wall by pre-embedded bolt.
5. the control bracing of foundation pit according to claim 1 prestress steel support of outer differential displacement within the walls, is characterized in that, is distributed with the bolt hole that connects use on H shaped steel.
6. the control bracing of foundation pit according to claim 1 prestress steel support of outer differential displacement within the walls, is characterized in that, the described loader be arranged on H shaped steel, and H shaped steel crossbeam and box-shaped connector by many root beads by the multiple tracks stiffener form; Between H shaped steel crossbeam and box-shaped connector, with bolt, be connected.
7. the control bracing of foundation pit according to claim 1 prestress steel support of outer differential displacement within the walls, is characterized in that, is provided with the packaged type jack in loader.
8. the control bracing of foundation pit according to claim 1 prestress steel support of outer differential displacement within the walls, is characterized in that, is provided with the fixed jack of self-locking in loader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320378768 CN203361163U (en) | 2013-06-28 | 2013-06-28 | Prestress steel support used for controlling differential displacement inside and outside foundation ditch enclosure wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320378768 CN203361163U (en) | 2013-06-28 | 2013-06-28 | Prestress steel support used for controlling differential displacement inside and outside foundation ditch enclosure wall |
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| Publication Number | Publication Date |
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| CN203361163U true CN203361163U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320378768 Withdrawn - After Issue CN203361163U (en) | 2013-06-28 | 2013-06-28 | Prestress steel support used for controlling differential displacement inside and outside foundation ditch enclosure wall |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290851A (en) * | 2013-06-28 | 2013-09-11 | 上海强劲地基工程股份有限公司 | Prestressed steel support used for controlling internal and external differential displacement of foundation pit enclosure wall and construction method |
| CN109440776A (en) * | 2018-11-02 | 2019-03-08 | 中国建筑第八工程局有限公司 | Axle power active control system and its axle power Active Control Method of the foundation pit to support structure |
| CN111549796A (en) * | 2020-05-28 | 2020-08-18 | 浙江明思特建筑支护技术有限公司 | Support head for foundation pit and use method of support head |
-
2013
- 2013-06-28 CN CN 201320378768 patent/CN203361163U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290851A (en) * | 2013-06-28 | 2013-09-11 | 上海强劲地基工程股份有限公司 | Prestressed steel support used for controlling internal and external differential displacement of foundation pit enclosure wall and construction method |
| CN103290851B (en) * | 2013-06-28 | 2015-05-20 | 上海强劲地基工程股份有限公司 | Prestressed steel support used for controlling internal and external differential displacement of foundation pit enclosure wall and construction method |
| CN109440776A (en) * | 2018-11-02 | 2019-03-08 | 中国建筑第八工程局有限公司 | Axle power active control system and its axle power Active Control Method of the foundation pit to support structure |
| CN109440776B (en) * | 2018-11-02 | 2023-11-17 | 中国建筑第八工程局有限公司 | Shaft force active control system and shaft force active control method for foundation pit opposite supporting structure |
| CN111549796A (en) * | 2020-05-28 | 2020-08-18 | 浙江明思特建筑支护技术有限公司 | Support head for foundation pit and use method of support head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20150520 |
|
| RGAV | Abandon patent right to avoid regrant |