CN209873901U - Single-pile compression-resistant static load test device - Google Patents
Single-pile compression-resistant static load test device Download PDFInfo
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- CN209873901U CN209873901U CN201920380297.7U CN201920380297U CN209873901U CN 209873901 U CN209873901 U CN 209873901U CN 201920380297 U CN201920380297 U CN 201920380297U CN 209873901 U CN209873901 U CN 209873901U
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Abstract
The utility model discloses a single pile compression resistance static load test device, which is characterized in that a horizontally arranged pull cap is respectively arranged on the upper surfaces of two end parts of a secondary steel beam, the pull cap is connected with an oblique anchor pile through a plurality of counter-force ribs, the counter-force ribs are symmetrically arranged on the left side and the right side of the secondary steel beam, and the central line of the pull cap and the top center of the oblique anchor pile are positioned on the same vertical line; a plurality of grid type through seams which correspond to the counterforce ribs and extend along the left-right direction are arranged on the pull cap, and the upper end parts of the counterforce ribs penetrate through the through seams and are locked on the pull cap by adopting locking nuts; the lower tip of reaction muscle is the bending segment, and the bending position of reaction muscle is the crossing position of this reaction muscle and oblique anchor pile top mouth, and the bending segment of reaction muscle is parallel with the longitudinal line of oblique anchor pile, and the laminating is welded on the lateral wall of oblique anchor pile, and the part vertical setting that the reaction muscle is located on the oblique anchor pile. The utility model discloses can guarantee that the bending segment of reaction muscle is unanimous with steel-pipe pile atress direction, realize the effective connection of oblique anchor pile and reaction muscle.
Description
Technical Field
The utility model relates to a vertical resistance to compression static load test of single pile, especially a single pile resistance to compression static load test device.
Background
The single-pile vertical compression resistance static load test is a test method for directly obtaining the vertical compression resistance ultimate bearing capacity value of the single pile, and is also a test method which is recognized to be the most reliable and closest to the real condition at present. During static load test, important parameters such as axial force distribution of the pile body, side frictional resistance of each rock and soil layer around the pile, pile end resistance, pile end displacement, elastic compression of the pile body and the like can be obtained through a sensor and the like embedded in the pile body. The method provides a basis for construction process parameter selection, pile type selection and the like when a construction unit and a design unit design the pile foundation.
Offshore wind power as a clean energy has the advantages of no land resource occupation, high power generation efficiency, no environmental pollution and the like, and is one of the most promising energy industries in recent years due to long coastline and rich wind power resources in China. As the offshore wind power plant is far away from the land, the construction difficulty of the wind turbine foundation is greatly increased compared with the land. As an important component for bearing the load of an upper fan, various structural forms have been developed, and common basic forms include: gravity type foundation, single pile foundation, high pile cap foundation, jacket foundation, floating foundation, etc.
A typical construction method of a high-pile bearing platform foundation is that a plurality of steel piles with the diameter of 1.5-2.0 m are symmetrically arranged according to the circumference, the pile bottoms are obliquely inserted into a bearing layer outwards, and the pile tops are connected into a whole by adopting a reinforced concrete bearing platform structure. In a vertical compression-resistant static load test of a high pile cap foundation pile, an engineering pile (inclined pile) of the high pile cap foundation pile is generally used as a counter-force anchor pile and a reference pile, and then a straight pile is added in the center of the circumference surrounded by the engineering pile to serve as a test pile. And after the test is finished, only the test pile needs to be cut off, and the peripheral engineering pile can be continuously reserved as the fan foundation of the machine position. The method greatly saves the cost and avoids unnecessary waste, thereby being welcomed by the vast construction units. However, because the anchor piles are inclined piles, an included angle is formed between the inclined anchor piles and the reaction rib when the vertical compression test is carried out, if effective measures cannot be taken for connection, the risk that the reaction rib is broken due to uneven stress or the connection part is broken and fails can occur, so that the test failure is caused, and the safety accident can also occur seriously. Considering that sea area stormy waves and climatic conditions of an offshore wind farm are generally severe, the number of workable days suitable for the test is very limited, some sea areas can be concentrated within two or three months, once the reaction rib is in problem during the test, the test period must be prolonged, and if the test time is missed, the progress of the whole test can be delayed for months or even one year. Therefore, how to effectively connect the reaction ribs and ensure that the test detection is smoothly carried out so as to achieve the purposes of catching the test opportunity and reducing the test cost is a key problem which needs to be solved urgently at present.
Disclosure of Invention
The utility model discloses a solve the technical problem that exists among the known art and provide a single pile resistance to compression static load test device that can realize oblique anchor pile and counter-force muscle effective connection.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a single-pile compression-resistant static load test device is characterized in that a test pile is arranged at the center of a circumference defined by engineering piles, and the engineering piles are used as inclined anchor piles; the test device comprises a loading hydraulic jack arranged on a test pile top, wherein a main steel beam is supported on the loading hydraulic jack, two ends of the main steel beam are respectively provided with a secondary steel beam, the secondary steel beams are fixedly connected with the main steel beam, and the main steel beam and the secondary steel beams form a reaction frame; the upper surfaces of the two end parts of the secondary steel beam are respectively provided with a horizontally arranged pull cap, the pull caps are connected with the inclined anchor piles through a plurality of reaction ribs, the reaction ribs are symmetrically arranged on the left side and the right side of the secondary steel beam, and the center line of each pull cap and the center of the top of each inclined anchor pile are positioned on the same vertical line; a plurality of grid type through seams which correspond to the counterforce ribs and extend along the left-right direction are arranged on the pull cap, and the upper end parts of the counterforce ribs penetrate through the through seams and are locked on the pull cap by adopting locking nuts; the lower end of the reaction rib is a bending section, the bending position of the reaction rib is the intersection position of the reaction rib and the top opening of the oblique anchor pile, the bending section of the reaction rib is parallel to the longitudinal line of the oblique anchor pile, the bending section is attached to and welded on the side wall of the oblique anchor pile, and the part of the reaction rib, which is positioned on the oblique anchor pile, is vertically arranged.
The utility model has the advantages and positive effects that: through setting up the through-seam on the nut that draws, the counter-force muscle position that makes vertical setting in the seam is adjustable, through the position of adjusting the counter-force muscle, the counter-force muscle that makes vertical setting intersects with the fore-set of oblique anchor pile, use this nodical as the bending point to buckle to the part that the counter-force muscle is located below the fore-set of oblique anchor pile to the direction that is close to the pile wall, the bending segment that makes the counter-force muscle is parallel with the longitudinal line of oblique anchor pile, and then the bending segment that makes the counter-force muscle can laminate the welding on the top lateral wall of oblique anchor pile, the bending segment that guarantees the counter-force muscle is unanimous with steel-pipe pile atress direction, thereby avoided appearing the atress inequality and leading to the counter-force muscle to be broken when experimental, the condition that.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of the connection structure of the oblique anchor pile and the counterforce rib of the present invention;
fig. 4 is a schematic structural view of a special bending tool used in the present invention;
FIG. 5 is a top view of FIG. 4;
fig. 6 is a schematic structural view of the bending tool used in the present invention.
In the figure: 1. testing piles; 2. an oblique anchor pile; 3. loading a hydraulic jack; 4. a main steel beam; 5. a secondary steel beam; 6. pulling the cap; 7. a reaction rib; 8. locking the nut; 9. bending the jack; 10. a limiting bolt; 11. a baffle plate; 12. hooking; 13. a support; 14. and (5) pushing the head.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, in a single-pile compression-resistant static load test device, a test pile 1 is arranged at the center of a circumference surrounded by engineering piles, and the engineering piles are used as inclined anchor piles 2.
The test device comprises a loading hydraulic jack 3 arranged at the top of a test pile 1, a main steel beam 4 is supported on the loading hydraulic jack 3, two ends of the main steel beam 4 are respectively provided with a secondary steel beam 5, the secondary steel beams 5 are fixedly connected with the main steel beam 4, and the main steel beam 4 and the secondary steel beams 5 form a reaction frame.
The utility model discloses a secondary steel beam 5, including secondary steel beam 5, secondary steel beam 2, the top of secondary steel beam 5, the top of secondary steel beam 2, the top of secondary steel beam 5, the top of secondary steel beam 2, the top of secondary steel beam 5, the top.
The pull cap 6 is provided with a plurality of grid type through seams which correspond to the reaction ribs 7 and extend along the left-right direction, the outer ends of the through seams are preferably sealed, the through seams can be sealed by adopting a connecting baffle plate or an integrated structure, so that the reaction ribs 7 are prevented from being separated from the pull cap 6.
The upper end part of the counterforce rib 7 passes through the through seam and is locked on the pull cap 6 by adopting a locking nut 8.
The lower end of the reaction rib 7 is a bending section, the bending position of the reaction rib 7 is the intersection position of the reaction rib 7 and the top opening of the oblique anchor pile 2, the bending section of the reaction rib 7 is parallel to the longitudinal line of the oblique anchor pile 2, and the bending section is attached to and welded on the side wall of the oblique anchor pile 2, and may be an inner side surface or an outer side surface. The part of the reaction rib 7 above the oblique anchor pile 2 is vertically arranged.
Two locking nuts 8 are recommended to prevent loosening. And recommending that the bent section of the reaction rib 7 is connected with the inclined anchor pile 2 by adopting a double-sided welding seam.
The construction method of the single-pile compression-resistant static load test device comprises the following steps:
1) installing a loading hydraulic jack 3;
2) constructing a main steel beam 4 and a secondary steel beam 5 to form a reaction frame;
3) horizontal pull caps 6 are arranged on the upper surfaces of the two end parts of the secondary steel beam 5, and the center line of each pull cap 6 and the center of the top of the inclined anchor pile 2 are located on the same vertical line; a plurality of grid type through seams which correspond to the counterforce ribs 7 and extend along the left and right direction are arranged on the pull cap 6;
4) the pull cap 6 and the inclined anchor pile 2 are connected by adopting a plurality of reaction ribs 7, the reaction ribs 7 are symmetrically arranged at the left side and the right side of the secondary steel beam 5, and the method for connecting the reaction ribs 7 with the inclined anchor pile 2 and the pull cap 6 adopts the following steps:
4.1) bending of the counterforce ribs
The upper end part of the counterforce rib 7 penetrates through the through seam and is connected to the pull cap 6 by adopting a locking nut 8, the counterforce rib 7 is moved in the through seam until the counterforce rib in a vertical state is intersected with the top opening of the inclined anchor pile 2, a special bending tool is adopted to bend the counterforce rib 7 at the intersection, so that the bending section of the counterforce rib 7 is parallel to the longitudinal line of the inclined anchor pile 2, and the part above the inclined anchor pile 2 is kept vertical;
4.2) repeating the step 4.1) until the bending of all the reaction ribs 7 is finished;
4.3) the bending sections of all the reaction ribs 7 are attached and welded on the side wall of the inclined anchor pile 2;
4.4) locking the locking nuts 8, and adjusting the tightness degree of all the locking nuts 8 to ensure that all the reaction ribs 7 are uniformly stressed.
Because the top opening of the inclined anchor pile connected with the counterforce rib is an arc inclined plane, the positions of the counterforce rib at the bending point of the top opening are different, and the bending angle of each counterforce rib is different, so that the counterforce rib is difficult to prefabricate in advance. The utility model discloses the instrument of bending to a section of this kind of operating mode special design for carry out the scene to the counter-force muscle and bend. Referring to fig. 4 to 6, the special bending tool comprises a support 13, a hook 12 adapted to the side wall of the oblique anchor pile 2 is arranged at the front end of the support 13, the bottom of the support 13 is provided with a bending jack 9 horizontally arranged along the front-back direction, the support 13 is provided with a baffle plate 11 positioned at the upper part of the front end of the bending jack 9, the baffle plate 11 is vertically arranged, an upper limit bolt 10 and a lower limit bolt 10 which are horizontally arranged along the left-right direction are inserted on the support 13, the limit bolts 10 are positioned in front of the baffle plate 11, the lower limit bolt is also used as a bending stop pin and is arranged in the same horizontal plane with the fixed end of the hook 12, the output end of the bending jack 9 is positioned below the bending stop pin, a vertical fixing space of a reaction rib extending vertically is formed between the two limit bolts 10 and the baffle plate 11.
In order to better push the reaction rib to bend, a push head 14 matched with the reaction rib 7 is connected to the output end of the bending jack 9.
The principle of bending the lower end part of the counter-force rib 7 is that the vertically arranged counter-force rib 7 begins to be bent at the top opening of the oblique anchor pile, and the bent section of the bent counter-force rib 7 is attached to the side wall of the oblique anchor pile so as to ensure that the stress direction of the counter-force rib is consistent with that of the oblique anchor pile 2. The reaction ribs 7 may thus be applied to the outer surface of the side walls of the oblique anchor pile, and also to the inner surface of the side walls of the oblique anchor pile.
The method for bending the reaction rib by adopting the tool comprises the following steps:
and selecting a part of the reaction rib between the pile top and the pulling cap, and connecting the bending tool to the reaction rib. The specific method comprises the steps of moving a bending tool to enable a baffle 11 to lean against a counterforce rib 7, then inserting a limiting bolt 10, enabling the counterforce rib 7 to penetrate through a counterforce rib vertical fixing space formed by the limiting bolt 10 and the baffle 11, enabling the bending tool to only move up and down and rotate, adjusting a deflection angle of the bending tool to enable the counterforce rib 7 to be located right above a side wall of the inclined anchor pile, then placing the bending tool from top to bottom until a hook is hung at the top of the side wall of the inclined anchor pile, enabling the bending tool to be possibly arranged on the inner side of the inclined anchor pile or on the outer side of the inclined anchor pile, starting a bending jack 9 to extend out, pushing the counterforce rib 7 to be located below the pile top, conducting bending processing on the counterforce rib according to the inclination of the pile wall, and enabling the portion, above the pile top, after processing, to be still in. The bending stop pin and the fixed end of the hook 12 are arranged in the same horizontal plane, and the hook 12 is hung on the top of the oblique anchor pile, so that the bending position of the counterforce rib is the intersection position of the counterforce rib and the top opening of the oblique anchor pile. Therefore, the bending section of the counterforce rib can be tightly attached to the pile wall, and the subsequent welding treatment is facilitated.
The utility model discloses can guarantee that the lower tip of reaction muscle is hugged closely with oblique anchor pile bolck lateral wall, and the atress direction is unanimous, can guarantee simultaneously again that the reaction muscle keeps vertical in the part more than the pile bolck to can effectively avoid appearing the atress inequality when experimental and lead to the reaction muscle to be broken, the welding seam draws the phenomenon that splits.
The utility model discloses can be used for the single pile resistance to compression static load test of offshore wind turbine high pile cushion cap basis, also can be used to the test of land similar structure.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (3)
1. A single-pile compression-resistant static load test device is characterized in that a test pile is arranged at the center of a circumference defined by engineering piles, and the engineering piles are used as inclined anchor piles;
the test device comprises a loading hydraulic jack arranged on a test pile top, wherein a main steel beam is supported on the loading hydraulic jack, two ends of the main steel beam are respectively provided with a secondary steel beam, the secondary steel beams are fixedly connected with the main steel beam, and the main steel beam and the secondary steel beams form a reaction frame;
the upper surfaces of the two end parts of the secondary steel beam are respectively provided with a horizontally arranged pull cap, the pull caps are connected with the inclined anchor piles through a plurality of reaction ribs, the reaction ribs are symmetrically arranged on the left side and the right side of the secondary steel beam, and the center line of each pull cap and the center of the top of each inclined anchor pile are positioned on the same vertical line;
it is characterized in that the preparation method is characterized in that,
a plurality of grid type through seams which correspond to the counterforce ribs and extend along the left-right direction are arranged on the pull cap, and the upper end parts of the counterforce ribs penetrate through the through seams and are locked on the pull cap by adopting locking nuts;
the lower end of the reaction rib is a bending section, the bending position of the reaction rib is the intersection position of the reaction rib and the top opening of the oblique anchor pile, the bending section of the reaction rib is parallel to the longitudinal line of the oblique anchor pile, the bending section is attached to and welded on the side wall of the oblique anchor pile, and the part of the reaction rib, which is positioned on the oblique anchor pile, is vertically arranged.
2. The single-pile compression-resistance static load test device according to claim 1, wherein there are two of the lock nuts.
3. The single-pile compression-resistant static load test device as recited in claim 1, wherein the bent sections of the reaction ribs are connected with the oblique anchor piles by double-sided welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380297.7U CN209873901U (en) | 2019-03-22 | 2019-03-22 | Single-pile compression-resistant static load test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380297.7U CN209873901U (en) | 2019-03-22 | 2019-03-22 | Single-pile compression-resistant static load test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209873901U true CN209873901U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920380297.7U Expired - Fee Related CN209873901U (en) | 2019-03-22 | 2019-03-22 | Single-pile compression-resistant static load test device |
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| Country | Link |
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| CN (1) | CN209873901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778926A (en) * | 2019-03-22 | 2019-05-21 | 交通运输部天津水运工程科学研究所 | A kind of single pile compression dead load test device, construction method and specific purpose tool |
-
2019
- 2019-03-22 CN CN201920380297.7U patent/CN209873901U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778926A (en) * | 2019-03-22 | 2019-05-21 | 交通运输部天津水运工程科学研究所 | A kind of single pile compression dead load test device, construction method and specific purpose tool |
| CN109778926B (en) * | 2019-03-22 | 2024-02-02 | 交通运输部天津水运工程科学研究所 | Single pile compression-resistant static load test device, construction method and special tool |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |