CN102619240A - Device for testing counterforce of sunk well foundation subsealing concrete - Google Patents
Device for testing counterforce of sunk well foundation subsealing concrete Download PDFInfo
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- CN102619240A CN102619240A CN2012101153876A CN201210115387A CN102619240A CN 102619240 A CN102619240 A CN 102619240A CN 2012101153876 A CN2012101153876 A CN 2012101153876A CN 201210115387 A CN201210115387 A CN 201210115387A CN 102619240 A CN102619240 A CN 102619240A
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- steel bar
- mounting box
- pressure gauge
- concrete
- bar framework
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Abstract
The invention discloses a device for testing a counterforce of sunk well foundation subsealing concrete. The device comprises a rectangular steel bar framework, a piezometer mounting box, a piezometer and a plurality of balance weight pieces, wherein the outer surface of the rectangular steel bar framework is coated by a steel wire gauze to form a sealed mesh cage; the piezometer mounting box is fixed at the central position of the bottom surface of the rectangular steel bar framework through connecting steel bars and is placed outside the steel wire gauze; the piezometer with the bottom stretching out of the bottom plane of the box is fixed in the piezometer mounting box through epoxy resin, and a lead of the piezometer after being led out from a sidewall hole of the piezometer mounting box is bound on the connecting steel bars; and the balance weight pieces are of reinforced concrete prefabricated framework structures which are formed by welding the steel bars, and are distributed inside the rectangular steel bar framework randomly. The device for testing the counterforce of the sunk well foundation subsealing concrete, disclosed by the invention, can be placed at the bottom of the sunk well precisely and can be sunk into the foundation soil under the action of gravity; and in the casting process of the subsealing concrete, the concrete can flow through the clearances among the balance weight pieces so as to avoid from being turned over or coated by the subsealing concrete, thereby preventing the piezometer mounting box from losing efficacy.
Description
Technical field
The present invention relates to a kind of pressure test device, relate in particular to a kind of open caisson foundation bottom concrete counter-force testing arrangement.
Background technology
The Foundation Design of heavy construction often adopts open caisson, and the open caisson buried depth is big, and globality is strong, good stability, and bigger loaded area is arranged, and can bear bigger vertical load and horizontal loading.The prediction definite and the foundation settlement amount of open caisson bearing capacity of foundation soil is the major issue that engineering design and construction is concerned about; The open caisson in the deep covering layer ground particularly; The monitoring of bottom concrete counter-force; Can obtain the open caisson duty, have great importance for open caisson foundation safe operation and Feedback Design.
Open caisson back cover counter-force is the active force between concrete and the foundation soil, should adopt earth pressure gauge to test.For open caisson foundation, the separation concrete generally adopts underwater casting, adopts to preset earth pressure gauge in the separation and monitor the bottom concrete counter-force and have very big difficulty, mainly contains: the earth pressure gauge that 1. presets generally under water, very difficulty is in place; Dashed when the pressure gauge of 2. placing is built by bottom concrete easily and turn over or wrap up in the concrete and lost efficacy; 3. cable conductor is not easy protection.Also do not see at present the report of open caisson bottom concrete counter-force testing arrangement.
Summary of the invention
Goal of the invention: the objective of the invention is to the deficiency to prior art, provide a kind of and be difficult for washed away or float, be difficult for by the concrete parcel or dash and turn over, can accurately locate the open caisson foundation bottom concrete counter-force testing arrangement that is positioned over the open caisson bottom.
Technical scheme: open caisson foundation bottom concrete counter-force testing arrangement of the present invention, comprise cuboid steel bar framework, pressure gauge mounting box, pressure gauge and counterweight, said cuboid steel bar framework external surface forms the cylinder mould of sealing through the gauze wire cloth parcel; Said pressure gauge mounting box is fixed on the bottom center position in the said cuboid steel bar framework through connecting reinforcement, places gauze wire cloth outside; Said pressure gauge is fixed in the said pressure gauge mounting box through epoxy resin, and the box baseplane is stretched out in manometric bottom, and manometric lead is drawn the back colligation on said connecting reinforcement from the areole of said pressure gauge mounting box; Said counterweight is the reinforced concrete prefabricated frame construction that reinforcement bar is welded, and several are arranged, and it is inner to be randomly dispersed in said cuboid steel bar framework.
In order to guarantee the good fixing effect of pressure gauge mounting box, said connecting reinforcement is eight, and the one of which end is connected on the said pressure gauge mounting box, and the other end is connected on eight angles of cuboid steel bar framework.The size of pressure gauge mounting box is confirmed according to manometric size.
In order to guarantee the good fixing effect of whole testing device, said counterweight is the reinforced concrete prefabricated frame construction of tetrahedron that reinforcement bar is welded, and this structure has good protection against erosion performance in application.
Comparative optimization ground, it is the reinforcing bar of 20mm that said cuboid steel bar framework adopts diameter, the size of framework: length * wide * height is 80cm * 80cm * 20cm.
Said gauze wire cloth adopts the braided steel wire of 0.6～0.9mm diameter to form.
The length of side of the reinforced concrete prefabricated frame construction of said tetrahedron is 5～10cm, and the volume fraction of frame construction is 0.15～0.3.
The place, four angles of the end face of said cuboid steel bar framework is welded with suspension ring respectively, makes things convenient for the lifting of testing arrangement.
Beneficial effect: 1, the present invention is simple in structure, simple installation, because device is than great, good water permeability is difficult for washed away or floats, and therefore can be positioned over the open caisson bottom by pinpoint, under action of gravity, can be absorbed in the foundation soil; Bottom concrete is built in the process, and concrete flow can be through the space in the middle of the counterweight, is unlikely to be dashed by bottom concrete to turn over or wrap up, and avoids pressure cell to lose efficacy; 2, counterweight of the present invention adopts the reinforced concrete prefabricated body frame construction in four sides that reinforcement bar is welded; Characteristics with permeate water, cement; Can effectively prevent the passing of current and bottom concrete, can guarantee that pressure cell closely contacts with foundation soil simultaneously pressure cell; 3, the present invention can effectively monitor the stress state of open caisson bottom concrete, and technology is reliable, and with low cost, practical application effect is good.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is pressure gauge mounting box of the present invention and manometric mounting structure sketch map.
Fig. 3 is the structural representation of counterweight among the embodiment.
The specific embodiment
Be elaborated in the face of technical scheme of the present invention down, but protection scope of the present invention is not limited to said embodiment.
Embodiment:Like Fig. 1, shown in 2 and 3; Open caisson foundation bottom concrete counter-force testing arrangement of the present invention; Comprise cuboid steel bar framework 1, pressure gauge mounting box 2, pressure gauge 3 and counterweight 4, said cuboid steel bar framework 1 external surface forms the cylinder mould of sealing through the gauze wire cloth parcel; Said pressure gauge mounting box 2 is fixed on the bottom center position in the said cuboid steel bar framework 1 through connecting reinforcement 5; And place gauze wire cloth outside; Said connecting reinforcement 5 is eight; The one of which end is connected on the said pressure gauge mounting box 2, and the other end is connected on eight angles of cuboid steel bar framework 1; Said pressure gauge 3 is fixed in the said pressure gauge mounting box 2 through epoxy resin 6, and the box baseplane is stretched out in the bottom of pressure gauge 3, and manometric lead 8 is drawn the back colligation on said connecting reinforcement from the areole of said pressure gauge mounting box 2; Said counterweight 4 has several for the reinforced concrete prefabricated frame construction of tetrahedron that reinforcement bar is welded, and is The more the better, exceeds can be full of cuboid steel bar framework inside, and it is inner to be randomly dispersed in said cuboid steel bar framework.The place, four angles of the end face of said cuboid steel bar framework 1 is welded with suspension ring 7 respectively.
It is the reinforcing bar of 20mm that said cuboid steel bar framework 1 adopts diameter, and the size of framework: length * wide * height is 80cm * 80cm * 20cm.Said gauze wire cloth adopts the braided steel wire of 0.6～0.9mm diameter to form.The length of side of said tetrahedron frame construction is 5～10cm, and the volume fraction of frame construction is 0.15～0.3.
Device can be absorbed in the foundation soil under action of gravity after putting into the open caisson bottom; Bottom concrete is built in the process, and concrete flow can see through gauze wire cloth and get in the cuboid steel bar framework, and gets into the space in the middle of the counterweight, makes whole device be unlikely to be dashed by bottom concrete and turns over or wrap up, and avoids pressure cell to lose efficacy.
As stated, although represented and explained the present invention that with reference to specific preferred embodiment it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the accompanying claims definition, can make various variations in form with on the details to it.
Claims (7)
1. open caisson foundation bottom concrete counter-force testing arrangement; It is characterized in that: comprise cuboid steel bar framework (1), pressure gauge mounting box (2), pressure gauge (3) and counterweight (4); Said cuboid steel bar framework (1) external surface forms the cylinder mould of sealing through the gauze wire cloth parcel; Said pressure gauge mounting box (2) is fixed on the bottom center position in the said cuboid steel bar framework (1) through connecting reinforcement (5), places gauze wire cloth outside; Said pressure gauge (3) is fixed in the said pressure gauge mounting box (2) through epoxy resin (6); The box baseplane is stretched out in the bottom of pressure gauge (3), and manometric lead (8) is drawn the back colligation on said connecting reinforcement from the areole of said pressure gauge mounting box (2); Said counterweight (4) has several for the reinforced concrete prefabricated frame construction that reinforcement bar is welded, and it is inner to be randomly dispersed in said cuboid steel bar framework.
2. open caisson foundation bottom concrete counter-force testing arrangement according to claim 1; It is characterized in that: said connecting reinforcement (5) is eight; The one of which end is connected on the said pressure gauge mounting box (2), and the other end is connected on eight angles of cuboid steel bar framework (1).
3. open caisson foundation bottom concrete counter-force testing arrangement according to claim 1 is characterized in that: the reinforced concrete prefabricated frame construction of tetrahedron that said counterweight (4) is welded for reinforcement bar.
4. open caisson foundation bottom concrete counter-force testing arrangement according to claim 1 is characterized in that: it is the reinforcing bar of 20mm that said square steel bar framework (1) adopts diameter, and the size of framework: length * wide * height is 80cm * 80cm * 20cm.
5. open caisson foundation bottom concrete counter-force testing arrangement according to claim 1 is characterized in that: said gauze wire cloth adopts the braided steel wire of 0.6～0.9mm diameter to form.
6. open caisson foundation bottom concrete counter-force testing arrangement according to claim 3, it is characterized in that: the length of side of said tetrahedron frame construction is 5～10cm, the volume fraction of frame construction is 0.15～0.3.
7. open caisson foundation bottom concrete counter-force testing arrangement according to claim 1 is characterized in that: the place, four angles of the end face of said cuboid steel bar framework (1) is welded with suspension ring (7) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210115387.6A CN102619240B (en) | 2012-04-19 | 2012-04-19 | Device for testing counterforce of sunk well foundation subsealing concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210115387.6A CN102619240B (en) | 2012-04-19 | 2012-04-19 | Device for testing counterforce of sunk well foundation subsealing concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102619240A true CN102619240A (en) | 2012-08-01 |
| CN102619240B CN102619240B (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210115387.6A Expired - Fee Related CN102619240B (en) | 2012-04-19 | 2012-04-19 | Device for testing counterforce of sunk well foundation subsealing concrete |
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| Country | Link |
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| CN (1) | CN102619240B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124109A (en) * | 2016-07-30 | 2016-11-16 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of concrete pressure meter mounting structure and installation method thereof |
| CN114541458A (en) * | 2022-02-24 | 2022-05-27 | 杭州建工集团有限责任公司 | Self-sinking precast concrete open caisson bed-mould structure for silt geological conditions and construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121918A (en) * | 1987-11-06 | 1989-05-15 | Nippon Telegr & Teleph Corp <Ntt> | Hand-writing input device |
| JPH1121918A (en) * | 1997-06-30 | 1999-01-26 | Taisei Corp | Constructing method of bottom slab of underground building frame |
| CN101818505A (en) * | 2010-04-24 | 2010-09-01 | 上海交通大学 | Soil pressure testing method for a cutting edge of caisson |
| CN201653600U (en) * | 2010-03-24 | 2010-11-24 | 国网电力科学研究院 | Isolated strain-free meter |
| KR20120004164A (en) * | 2010-07-06 | 2012-01-12 | 성균관대학교산학협력단 | Sensor structure embedded in concrete and method for forming sensor structure |
-
2012
- 2012-04-19 CN CN201210115387.6A patent/CN102619240B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01121918A (en) * | 1987-11-06 | 1989-05-15 | Nippon Telegr & Teleph Corp <Ntt> | Hand-writing input device |
| JPH1121918A (en) * | 1997-06-30 | 1999-01-26 | Taisei Corp | Constructing method of bottom slab of underground building frame |
| CN201653600U (en) * | 2010-03-24 | 2010-11-24 | 国网电力科学研究院 | Isolated strain-free meter |
| CN101818505A (en) * | 2010-04-24 | 2010-09-01 | 上海交通大学 | Soil pressure testing method for a cutting edge of caisson |
| KR20120004164A (en) * | 2010-07-06 | 2012-01-12 | 성균관대학교산학협력단 | Sensor structure embedded in concrete and method for forming sensor structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124109A (en) * | 2016-07-30 | 2016-11-16 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of concrete pressure meter mounting structure and installation method thereof |
| CN106124109B (en) * | 2016-07-30 | 2018-11-02 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of concrete pressure meter mounting structure and its installation method |
| CN114541458A (en) * | 2022-02-24 | 2022-05-27 | 杭州建工集团有限责任公司 | Self-sinking precast concrete open caisson bed-mould structure for silt geological conditions and construction method |
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| Publication number | Publication date |
|---|---|
| CN102619240B (en) | 2014-06-11 |
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