CN105780824A - Profile steel testing method for foundation pit profile steel inner support system - Google Patents
Profile steel testing method for foundation pit profile steel inner support system Download PDFInfo
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- CN105780824A CN105780824A CN201610150521.4A CN201610150521A CN105780824A CN 105780824 A CN105780824 A CN 105780824A CN 201610150521 A CN201610150521 A CN 201610150521A CN 105780824 A CN105780824 A CN 105780824A
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- shaped steel
- jack
- support system
- purlin
- inner support
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- 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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- 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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a profile steel testing method for a foundation pit profile steel inner support system, and aims to provide a profile steel testing method capable of accurately obtaining such testing data as the stress displacement of purline beams and support beams, the stress damage limit of the purline beams and the compression quantity of the support beams in actual use process of the foundation pit profile steel inner support system. The system comprises a jack, a total station, the purline beams and the support beams arranged between the purline beams; the total station includes multiple target prisms; and the profile steel testing method comprises the following steps in sequence: (1) the jack is positioned between the support beams and the purline beams; and the multiple target prisms are fixed on the support beams; and (2) the precompression is applied between the support beams and the purline beams through the jack; the jack upwards increases the precompression step by step according to the pressure of P MPa at each time; and after the jack finishes once compression for stop by T minutes, the total station measures and acquires three coordinates (x, y, z) of measuring points of all the target prisms, and then, the next compression is performed.
Description
Technical field
The present invention relates to a kind of shaped steel method of testing, be specifically related to a kind of shaped steel method of testing for foundation ditch shaped steel inner support system.
Background technology
The inner support system being made up of shaped steel in current foundation ditch generally include around margin of foundation pit arrange enclose purlin beam and being arranged on enclose between purlin beam to support beam, wherein foundation ditch shaped steel inner support system in use enclose purlin beam and to support beam rigidity, compressive deformation displacement (decrement when including support beam support beam pressurized, vertical displacement and horizontal comparison) and enclose purlin joist steel and support the important parameter that the technical parameter such as shear behavior of pre-embedded bolt is to ensure that the supporting construction intensity of foundation ditch shaped steel inner support system, it is necessary to carry out acquirement or the checking of data through scientific experimentation.
But enclosing purlin beam and the support type steel support construction weight such as beam is big due to foundation ditch shaped steel inner support system, and the shaped steel system of test generally reaches tens of rice to more than 100 meters, single track supported weight reaches tens of ton to tons up to a hundred；This makes temporarily do not have laboratory the actually used various performance parameters of type field bracing members can be carried out laboratory test or inspection at present；Cause in foundation ditch shaped steel inner support system to support beam and enclose the parameters of purlin beam and all obtained by Theoretical Calculation, lack the checking of test data.
Summary of the invention
The invention aims to overcome the deficiencies in the prior art, a kind of shaped steel method of testing for foundation ditch shaped steel inner support system is provided, its can obtain accurately on-the-spot foundation ditch shaped steel inner support system enclose in pressurized process purlin beam and to the pressurized displacement of support beam, enclose the compression damage limit of purlin beam and to test datas such as the decrements of support beam, the supporting construction intensity for ensureing foundation ditch shaped steel inner support system provides and ensures reliably.
The technical scheme is that
A kind of shaped steel method of testing for foundation ditch shaped steel inner support system include jack, total powerstation, be arranged on margin of foundation pit enclose purlin beam and being arranged on enclose between purlin beam to support beam, described total powerstation includes some target prisms, comprises the following steps successively:
The first step, is placed in jack support beam and encloses between purlin beam；To the fixing some target prisms on support beam；
Second step, by jack to supportting beam and enclosing applying precompression between purlin beam, jack upwards increases precompression step by step with the pressure of each P MPa, and jack often completes once to pressurize, by total station survey the three coordinate (x gathering each target prism measuring point after stopping T minute, y, z), then pressurizes next time.
The shaped steel method of testing of this programme can obtain accurately on-the-spot foundation ditch shaped steel inner support system enclose in pressurized process purlin beam and to the pressurized displacement of support beam, enclose the compression damage limit of purlin beam and to test datas such as the decrements of support beam, the supporting construction intensity for ensureing foundation ditch shaped steel inner support system provides and ensures reliably.
As preferably, the first step also including: with to support beam end relative enclosing, purlin beam is being fixed target prism.
As preferably, the target prism on support beam being equally spaced along to the length direction supportting beam.
As preferably, the target prism that the left and right sides of support beam is all equally spaced described.
A kind of shaped steel method of testing for foundation ditch shaped steel inner support system include jack, total powerstation, be arranged on margin of foundation pit enclose purlin beam, some be arranged on the gusseted part enclosed inside purlin beam and being arranged on enclose between purlin beam to support beam, described gusseted part is connected with enclosing purlin beam by bolt, described one end to support beam is resisted against on a gusseted part side, the other end is on another gusseted part side, described total powerstation includes some target prisms, comprises the following steps successively:
The first step, is placed in jack between support beam and gusseted part；To the fixing some target prisms on support beam；
Second step, by jack to supportting beam and enclosing applying precompression between purlin beam, jack upwards increases precompression step by step with the pressure of each P MPa, and jack often completes once to pressurize, by total station survey the three coordinate (x gathering each target prism measuring point after stopping T minute, y, z), then pressurizes next time.
The shaped steel method of testing of this programme can not only obtain accurately on-the-spot foundation ditch shaped steel inner support system enclose in pressurized process purlin beam and to the pressurized displacement of support beam, enclose the compression damage limit of purlin beam and to test datas such as the decrements of support beam, but also gusseted part and the shear behavior of bolt enclosed between purlin beam can be obtained, the supporting construction intensity for ensureing foundation ditch shaped steel inner support system provides and ensures reliably.
As preferably, the first step also including: with to support beam end relative enclosing, purlin beam is being fixed target prism.
As preferably, the first step also including: fix at least one target prism on gusseted part.
As preferably, the target prism on support beam being equally spaced along to the length direction supportting beam.
As preferably, the target prism that the left and right sides of support beam is all equally spaced described.
The invention has the beneficial effects as follows: can obtain accurately on-the-spot foundation ditch shaped steel inner support system enclose in pressurized process purlin beam and to the pressurized displacement of support beam, enclose the compression damage limit of purlin beam, to test datas such as the decrement of support beam and gusseted part and the shear behaviors of bolt that encloses between purlin beam, the supporting construction intensity for ensureing foundation ditch shaped steel inner support system provides and ensures reliably.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of a kind of shaped steel method of testing for foundation ditch shaped steel inner support system of embodiments of the invention 1.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Fig. 3 is a kind of structural representation of a kind of shaped steel method of testing for foundation ditch shaped steel inner support system of embodiments of the invention 2.
In figure: enclosing purlin beam 1, prestressing force reservation member 2, support parts 21, to support beam 3, target prism 4, jack 5, gusseted part 6.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
Embodiment 1: as shown in Figure 1 and Figure 2, a kind of shaped steel method of testing for foundation ditch shaped steel inner support system include jack 5, total powerstation, be arranged on margin of foundation pit enclose purlin beam 1 and being arranged on enclose between purlin beam to support beam 3.Total powerstation includes some target prisms 4.In the present embodiment to support beam and enclose and between purlin beam, be provided with prestressing force reservation member 2.Prestressing force reservation member includes two the support parts 21 that can mutually strut, and wherein support parts are connected with enclosing purlin beam by bolt, and another is supported parts and is connected with to the end supportting beam by bolt.
A kind of shaped steel method of testing for foundation ditch shaped steel inner support system comprises the following steps successively:
The first step: being placed in by jack support beam and enclose between purlin beam, the jack in this enforcement is hydraulic jack, and jack 5 is between two support parts 21, jack supports parts for two strutted；
To the fixing some target prisms 4 on support beam 3, the target prism on support beam is equally spaced by this enforcement along to the length direction supportting beam, and to the target prism that the left and right sides supportting beam is all equally spaced described；
With to support beam end relative enclosing, purlin beam is being fixed target prism 4.
Second step: support beam is being applied precompression (paralleling in the direction of this precompression) with to the length direction supportting beam with enclosing between purlin beam by jack, jack upwards increases precompression step by step with the pressure of each 1 MPa or 2 MPas or 3 MPas or 4 MPas, and jack often completes once to pressurize, by total station survey the three coordinate (x gathering each target prism measuring point after stopping 10 minutes or 15 minutes or 20 minutes, y, z), then pressurize next time.
In the present embodiment, the pressurization number of times of jack is between 10 to 50 times.
In the present embodiment, jack upwards increases precompression step by step by 0 MPa.
Jack in the present embodiment often pressurizes once, by total station survey and gather three coordinates of each target prism measuring point (x, y z), obtain enclosing purlin beam and to corresponding three coordinate datas of target prism place each point on support beam；Thus obtaining on-the-spot foundation ditch shaped steel inner support system accurately in pressurized process along with pressure increases: the pressurized displacement enclosing purlin beam, the compression damage limit enclosing purlin beam, to test datas such as the pressurized displacement (including vertical displacement and horizontal lateral displacement) of support beam, the decrements enclosing purlin beam, the supporting construction intensity for ensureing foundation ditch shaped steel inner support system provides and ensures reliably.
On the other hand, jack often pressurize once complete after can also directly lead to slide gauge and measure two spacing supported between parts, enclose purlin beam and the decrement to support beam thus directly obtaining.
Embodiment 2: as it is shown on figure 3, a kind of shaped steel method of testing for foundation ditch shaped steel inner support system include jack, total powerstation, be arranged on margin of foundation pit enclose purlin beam 1, some be arranged on the gusseted part 6 enclosed inside purlin beam and being arranged on enclose between purlin beam to support beam 3.Total powerstation includes some target prisms 4.Gusseted part is connected with enclosing purlin beam by bolt, encloses purlin beam and be provided with pre-embedded bolt in the present embodiment, and gusseted part is connected with enclosing purlin beam by pre-embedded bolt.Being resisted against on a gusseted part side to one end of support beam, the other end is on another gusseted part side.In the present embodiment to support beam and gusseted part between be provided with prestressing force reservation member 2.Prestressing force reservation member includes two the support parts 21 that can mutually strut, and wherein support parts are connected with enclosing purlin beam by bolt, and another is supported parts and is connected with to the end supportting beam by bolt.
A kind of shaped steel method of testing for foundation ditch shaped steel inner support system comprises the following steps successively:
The first step: being placed in by jack between support beam and gusseted part, the jack in this enforcement is hydraulic jack, and jack is between two support parts, supports parts for two strutted；
To the fixing some target prisms 4 on support beam, the target prism on support beam is equally spaced by this enforcement along to the length direction supportting beam, and to the target prism that the left and right sides supportting beam is all equally spaced described；
With to support beam end relative enclosing, purlin beam is being fixed target prism；
Gusseted part is fixed at least one target prism.
Second step: support beam is being applied precompression (paralleling in the direction of this precompression) with to the length direction supportting beam with enclosing between purlin beam by jack, jack upwards increases precompression step by step with the pressure of each 1 MPa or 2 MPas or 3 MPas or 4 MPas, and jack often completes once to pressurize, by total station survey the three coordinate (x gathering each target prism measuring point after stopping 10 minutes or 15 minutes or 20 minutes, y, z), then pressurize next time.
In the present embodiment, the pressurization number of times of jack is between 10 to 50 times.
In the present embodiment, jack upwards increases precompression step by step by 0 MPa.
Jack in the present embodiment often pressurizes once, by total station survey and gather three coordinates of each target prism measuring point (x, y z), obtain enclosing purlin beam and to corresponding three coordinate datas of target prism place each point on support beam；Thus obtaining on-the-spot foundation ditch shaped steel inner support system accurately in pressurized process along with pressure increases: the pressurized displacement enclosing purlin beam, the compression damage limit enclosing purlin beam, to test datas such as the pressurized displacement (including vertical displacement and horizontal lateral displacement) of support beam, the decrements enclosing purlin beam, the supporting construction intensity for ensureing foundation ditch shaped steel inner support system provides and ensures reliably.
On the other hand, the present embodiment can also record the anti-shear performance of the pre-embedded bolt enclosed on purlin beam.
Claims (9)
1. the shaped steel method of testing for foundation ditch shaped steel inner support system, including jack, total powerstation, be arranged on margin of foundation pit enclose purlin beam and being arranged on enclose between purlin beam to support beam, described total powerstation includes some target prisms, it is characterized in that, comprises the following steps successively:
The first step, is placed in jack support beam and encloses between purlin beam；To the fixing some target prisms on support beam；
Second step, by jack to supportting beam and enclosing applying precompression between purlin beam, jack upwards increases precompression step by step with the pressure of each P MPa, and jack often completes once to pressurize, by total station survey the three coordinate (x gathering each target prism measuring point after stopping T minute, y, z), then pressurizes next time.
2. a kind of shaped steel method of testing for foundation ditch shaped steel inner support system according to claim 1, is characterized in that, also include in the described first step: fixing target prism on purlin beam with to support beam end relative enclosing.
3. a kind of shaped steel method of testing for foundation ditch shaped steel inner support system according to claim 1 and 2, is characterized in that, the described target prism to supportting on beam is equally spaced along to the length direction supportting beam.
4. a kind of shaped steel method of testing for foundation ditch shaped steel inner support system according to claim 1, is characterized in that, the described target prism being all equally spaced described to the left and right sides of support beam.
5. the shaped steel method of testing for foundation ditch shaped steel inner support system, including jack, total powerstation, be arranged on margin of foundation pit enclose purlin beam, some be arranged on the gusseted part enclosed inside purlin beam and being arranged on enclose between purlin beam to support beam, described gusseted part is connected with enclosing purlin beam by bolt, described one end to support beam is resisted against on a gusseted part side, the other end is on another gusseted part side, described total powerstation includes some target prisms, it is characterized in that, comprise the following steps successively:
The first step, is placed in jack between support beam and gusseted part；To the fixing some target prisms on support beam；
Second step, by jack to supportting beam and enclosing applying precompression between purlin beam, jack upwards increases precompression step by step with the pressure of each P MPa, and jack often completes once to pressurize, by total station survey the three coordinate (x gathering each target prism measuring point after stopping T minute, y, z), then pressurizes next time.
6. a kind of shaped steel method of testing for foundation ditch shaped steel inner support system according to claim 5, is characterized in that, also include in the described first step: fixing target prism on purlin beam with to support beam end relative enclosing.
7. a kind of shaped steel method of testing for foundation ditch shaped steel inner support system according to claim 5 or 6, is characterized in that, also include in the described first step: fix at least one target prism on gusseted part.
8. a kind of shaped steel method of testing for foundation ditch shaped steel inner support system according to claim 5 or 6, is characterized in that, the described target prism to supportting on beam is equally spaced along to the length direction supportting beam.
9. a kind of shaped steel method of testing for foundation ditch shaped steel inner support system according to claim 8, is characterized in that, the described target prism being all equally spaced described to the left and right sides of support beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150521.4A CN105780824B (en) | 2016-03-16 | 2016-03-16 | A kind of shaped steel method of testing for foundation ditch shaped steel inner support system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610150521.4A CN105780824B (en) | 2016-03-16 | 2016-03-16 | A kind of shaped steel method of testing for foundation ditch shaped steel inner support system |
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| CN105780824A true CN105780824A (en) | 2016-07-20 |
| CN105780824B CN105780824B (en) | 2018-02-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217116A (en) * | 2022-07-22 | 2022-10-21 | 江苏索普工程科技有限公司 | Combined type section steel supporting and protecting piece and using method thereof |
| CN115369886A (en) * | 2022-04-21 | 2022-11-22 | 东通岩土科技股份有限公司 | Tool type supporting system capable of automatically adjusting axial force for foundation pit |
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| KR20050042878A (en) * | 2003-11-04 | 2005-05-11 | 이기재 | Temporary member structure for observation of land-side protection wall |
| CN103352455A (en) * | 2013-07-30 | 2013-10-16 | 上海城建市政工程（集团）有限公司 | Monitoring method of bottom soil heave of excavation foundation pit |
| CN103981906A (en) * | 2014-05-17 | 2014-08-13 | 吴保全 | Measuring point-preset measuring method for deformation of foundation pit support |
| CN105239587A (en) * | 2015-11-16 | 2016-01-13 | 戴向胜 | Splayed diagonal bracing type steel bracing system of foundation pit enclosure wall |
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2016
- 2016-03-16 CN CN201610150521.4A patent/CN105780824B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050042878A (en) * | 2003-11-04 | 2005-05-11 | 이기재 | Temporary member structure for observation of land-side protection wall |
| CN103352455A (en) * | 2013-07-30 | 2013-10-16 | 上海城建市政工程（集团）有限公司 | Monitoring method of bottom soil heave of excavation foundation pit |
| CN103981906A (en) * | 2014-05-17 | 2014-08-13 | 吴保全 | Measuring point-preset measuring method for deformation of foundation pit support |
| CN105239587A (en) * | 2015-11-16 | 2016-01-13 | 戴向胜 | Splayed diagonal bracing type steel bracing system of foundation pit enclosure wall |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369886A (en) * | 2022-04-21 | 2022-11-22 | 东通岩土科技股份有限公司 | Tool type supporting system capable of automatically adjusting axial force for foundation pit |
| CN115217116A (en) * | 2022-07-22 | 2022-10-21 | 江苏索普工程科技有限公司 | Combined type section steel supporting and protecting piece and using method thereof |
| CN115217116B (en) * | 2022-07-22 | 2023-12-15 | 江苏索普工程科技有限公司 | Combined type steel support protection piece and application method thereof |
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| CN105780824B (en) | 2018-02-02 |
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