CN209837122U - Foundation pit pile testing structure - Google Patents
Foundation pit pile testing structure Download PDFInfo
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- CN209837122U CN209837122U CN201920243145.2U CN201920243145U CN209837122U CN 209837122 U CN209837122 U CN 209837122U CN 201920243145 U CN201920243145 U CN 201920243145U CN 209837122 U CN209837122 U CN 209837122U
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Abstract
The embodiment of the utility model relates to the field of foundation pits, and provides a foundation pit pile testing structure, which comprises a first pile section, a loading device, a second pile section and a stacking object; the pile top of the first pile section is positioned at the bottom of the foundation pit to be excavated, and the pile top of the first pile section is connected with one side of the loading device; the opposite side of the loading device is connected with the pile bottom of the second pile section, and the pile top of the second pile section is positioned at the pit top of the foundation pit to be excavated; the piling object is arranged at the pile top of the second pile section and used for loading the first pile section. In the foundation pit pile testing structure provided by the embodiment of the utility model, the pile testing result obtained by the pile testing structure is the test numerical value from the pile top to the pile bottom of the pile foundation, and the pile testing result is accurate and does not need to be converted; and the pile top of the second pile section is arranged at the top of the pit to be excavated, and the pile top of the second pile section is provided with a pile loading object, so that the pile testing process is carried out on the ground, and the tonnage of the pile loading object of the test pile is reduced.
Description
Technical Field
The embodiment of the utility model provides a relate to foundation ditch technical field, especially relate to a foundation ditch pile testing structure.
Background
Because the city district foundation ditch risk coefficient is great, the foundation ditch risk can be increased to the pile test after the foundation ditch excavation, and the foundation ditch bottom surface is not convenient for do extensive heap and carry moreover, generally needs to add and establishes the anchor pile. If pile testing is carried out on the ground, firstly, a pile head must be driven to the ground, and the side frictional resistance of the ground part needs to be considered, so that the tonnage of the tested pile is large, the pile loading scale is large, the side frictional resistance of the empty drilling end of the foundation pit needs to be deducted by the obtained numerical value, and the numerical value is not direct and is not accurate enough.
If a self-balancing method is adopted for testing the pile, the negative friction resistance of the pile is smaller than the friction resistance, the setting position of the self-balancing loading ring is generally lower, the obtained result needs to be converted, and the numerical value is inaccurate. Moreover, the common self-balancing loading jack cannot be taken out for recycling.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a foundation ditch test pile structure for try the unsafe problem of stake result among the solution prior art.
The embodiment of the utility model provides a foundation ditch test pile structure, include: the pile loading device comprises a first pile section, a loading device, a second pile section and a stacking object; the pile top of the first pile section is positioned at the bottom of the foundation pit to be excavated, and the pile top of the first pile section is connected with one side of the loading device; the opposite side of the loading device is connected with the pile bottom of the second pile section, and the pile top of the second pile section is positioned at the pit top of the foundation pit to be excavated; the stacking object is arranged at the pile top of the second pile section and used for loading the first pile section.
Wherein, foundation ditch test pile structure, still include: a data reading box; the data reading box comprises a loading force reading component connected with the loading device, and the loading force reading component is used for reading the loading force of the loading device.
Wherein the loading force reading part comprises: a force sensor and a first display structure coupled; the force sensor is arranged on one side, close to the first pile section, of the loading device, and the first display structure is arranged near the top of the pit to be excavated.
Wherein, the data reading case includes: and the displacement reading component is connected with the loading device and is used for reading the displacement value of the loading device.
Wherein the displacement reading means comprises: the displacement sensor and the second display structure are connected; the displacement sensor is arranged on one side, close to the first pile section, of the loading device, and the second display structure is arranged near the top of the pit to be excavated.
Wherein, foundation ditch test pile structure, still include: a loading plate; one side of the loading plate is connected with the pile top of the second pile section, and the ballast is arranged on the opposite side of the loading plate.
Wherein the loading device comprises a jack.
The cross section of the first pile section is circular, the cross section of the second pile section is circular, and the cross section of the loading device is annular.
The embodiment of the utility model provides a foundation ditch pile test structure, through making the pile bolck of first pile section and the pile bolck elevation position of design pile foundation flush, and set up the loading device in the pile bolck department of first pile section, make the pile test result that this pile test process obtained be the experimental numerical value of pile bolck to pile bottom of pile foundation, the pile test result is accurate and need not to convert; the pile top of the second pile section is arranged at the pit top of the foundation pit to be excavated, and the pile top of the second pile section is provided with a stacking object, so that the pile testing process is carried out on the ground, the exposure time of the foundation pit is reduced, and the safety of the foundation pit is improved; meanwhile, the tonnage of pile loading of the test pile can be greatly reduced by ground test pile, the pile loading engineering quantity is reduced, and the ground test pile condition is better than that of the foundation pit bottom.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a foundation pit pile testing structure of the present invention;
fig. 2 is a flow chart of a preferred implementation method of the foundation pit pile testing structure of the present invention;
wherein, 1-a first pile section; 2-a second pile section; 3-a loading device; 4-a loading plate; 5-a data reading box; 6-stacking and loading.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Fig. 1 shows a preferred embodiment of the foundation pit test pile structure of the present invention, as shown in fig. 1, the test pile structure includes: the pile loading device comprises a first pile section 1, a loading device 3, a second pile section 2 and a stacking object 6; the pile top of the first pile section 1 is positioned at the pit bottom of the foundation pit to be excavated, and the pile top of the first pile section 1 is connected with one side of the loading device 3; the opposite side of the loading device 3 is connected with the pile bottom of the second pile section 2, and the pile top of the second pile section 2 is positioned at the pit top of the foundation pit to be excavated; the ballast 6 is arranged at the pile top of the second pile section 2 for loading the first pile section 1.
Specifically, when testing the foundation pit pile foundation, firstly piling at a set position of the foundation pit to be excavated, namely the piling position is the same as the set position of the pile foundation after excavation of the foundation pit; firstly binding the reinforcement cage, hoisting the bound reinforcement cage into a set position of the foundation pit to be excavated, and enabling the top of the reinforcement cage to be flush with the top of the foundation pit to be excavated; fixing a loading box at the position, opposite to the bottom of the foundation pit to be excavated, of the reinforcement cage, wherein the loading device 3 is an annular loading device 3, and the loading device is a jack or the like; and then, pouring the steel reinforcement cage to complete the construction of the pile body, namely, the pile section below the loading device is an engineering pile section (namely, a first pile section 1), and the pile section above the loading device is a test pile section (namely, a second pile section 2). Namely, the height of the first pile section 1 reaches the pile top elevation of the designed foundation pile, and the height of the second pile section 2 reaches the ground elevation; at this time, a ballast 6 is provided at the pile top of the second pile section 2, for example, the ballast 6 may be a concrete block or other heavy object; the first pile section 1 is loaded by the loading object 6, and the bearing capacity of the first pile section 1 is tested, that is, the first pile section 1 is tested. Because the length of the first pile section 1 is consistent with that of the pile foundation, the loading device 3 is arranged at the pile top of the first pile section 1, and the pile loading is carried out on the ground, the obtained pile testing result is a pile testing value below the pile top elevation of the pile foundation, conversion is not needed, the pile testing result is accurate, the tonnage of the pile loading object 6 of the pile testing is greatly reduced, and the engineering load of the pile loading is reduced; and after the test pile is finished and the foundation pit is excavated, the loading device 3 can be excavated and recovered, and can be repeatedly utilized when the next test pile is carried out, so that the purpose of reasonably utilizing resources is achieved.
In the embodiment of the utility model, the pile top of the first pile section is flush with the pile top elevation position of the designed pile foundation, and the loading device is arranged at the pile top of the first pile section, so that the pile testing result obtained in the pile testing process is the test numerical value from the pile top to the pile bottom of the pile foundation, and the pile testing result is accurate and does not need conversion; the pile top of the second pile section is arranged at the pit top of the foundation pit to be excavated, and the pile top of the second pile section is provided with a stacking object, so that the pile testing process is carried out on the ground, the exposure time of the foundation pit is reduced, and the safety of the foundation pit is improved; meanwhile, the tonnage of pile loading of the test pile can be greatly reduced by ground test pile, the pile loading engineering quantity is reduced, and the ground test pile condition is better than that of the foundation pit bottom.
In addition, the stacking value of the stacking object 6 can be determined according to the bearing force value of the first pile section 1 and the negative friction resistance value of the second pile section 2, namely the self-weight value of the second pile section 2; for example, the stacking load value of the stacking load 6 is the load bearing value of the first pile segment 1, the negative friction resistance value of the second pile segment 2, and the self weight value of the second pile segment 2. And current test pile in-process, if adopt ground test pile, pile and carry thing 6 and pile and carry value 1's bearing capacity value + the frictional resistance value of second stake section 2 of first stake section, owing to can know, the utility model provides a test pile method can reduce the pile weight of carrying of test pile in-process by a wide margin, especially under the darker condition of foundation ditch, and the reduction effect of pile weight is more obvious.
Further, foundation ditch test pile structure still includes: a data reading box 5; the data reading box 5 includes a loading force reading part connected to the loading device 3, the loading force reading part being used to read the loading force of the loading device 3. For example, the loading force reading component within the data reading compartment 5 includes a force sensor and a first display structure connected to each other; for example, the force sensor is arranged on the side of the loading device 3 close to the first pile section 1, and the first display structure is arranged on the ground; the loading force value of the loading device 3 can be obtained in real time through the force sensor, and the loading force value obtained by the force sensor is displayed in real time through the first display structure, namely the bearing force value of the first pile section 1 in the pile testing process is displayed in real time.
Further, the data reading box 5 includes a displacement reading means connected to the loading device 3 for reading a displacement value of the loading device 3. For example, the displacement reading means in the data reading box 5 comprises a displacement sensor and a second display structure connected to each other; for example, the displacement sensor is arranged on the side of the loading device 3 close to the first pile section 1, and the second display structure is arranged on the ground; the displacement condition of the loading device 3 can be obtained in real time through the displacement sensor, and the displacement value obtained by the displacement sensor is displayed in real time through the second display structure.
Further, foundation ditch test pile structure still includes: a loading plate 4; one side of the load plate 4 is connected to the pile top of the second pile section 2 and the ballast 6 is arranged on the opposite side of the load plate 4. That is, load plate 4 is disposed at the pile top of second pile section 2, for example, when load plate 4 is placed horizontally, the portion of one side of load plate 4 outside the region connected to second pile section 2 is in contact with the ground; the loading plate 4 is loaded with a loading material 6 for loading the first pile section 1. Since no data reading is required at the bottom of the loading plate 4, the loading plate 4 does not have to be overhead as in the conventional stacking method, i.e. the pile top of the second pile section 2 should be securely connected to the loading plate 4.
Further, the cross section of the first pile section 1 is circular, the cross section of the second pile section 2 is circular, and the cross section of the loading device 3 is annular.
The utility model discloses an implementation method of foundation ditch test pile structure, as shown in FIG. 2, this implementation method can include: hoisting the bound reinforcement cage into a set position of the foundation pit to be excavated, and enabling the top of the reinforcement cage to be flush with the top of the foundation pit to be excavated; embedding a loading device 3 at a position, opposite to the bottom of the foundation pit to be excavated, of the reinforcement cage; and pouring a steel reinforcement cage to form a pile body, and arranging a stacking object 6 at the position where the pile body is flush with the pit top of the foundation pit to be excavated.
Specifically, when testing the foundation pit pile foundation, firstly piling at a set position of the foundation pit to be excavated, namely the piling position is the same as the set position of the pile foundation after excavation of the foundation pit; firstly binding the reinforcement cage, hoisting the bound reinforcement cage into a set position of the foundation pit to be excavated, and enabling the top of the reinforcement cage to be flush with the top of the foundation pit to be excavated; fixing a loading box at the position, opposite to the bottom of the foundation pit to be excavated, of the reinforcement cage, wherein the loading device 3 is an annular loading device 3, and the loading device is a jack or the like; and then, pouring the steel reinforcement cage to complete the construction of the pile body, namely, the pile section below the loading device is an engineering pile section (namely, a first pile section 1), and the pile section above the loading device is a test pile section (namely, a second pile section 2). At this time, a pile loading object 6 is arranged at the pile top of the second pile section 2, namely, the first pile section 1 is loaded through the pile loading object 6, and the bearing capacity of the first pile section 1 is tested, namely, the pile test is carried out on the first pile section 1. Because the length of the first pile section 1 is consistent with the length of the pile foundation, the loading device 3 is arranged at the pile top of the first pile section 1, and the pile loading is carried out on the ground, namely a mode of combining a self-balancing method and a pile loading method is adopted, the obtained pile testing result is the pile testing value below the pile top elevation of the pile foundation, conversion is not needed, the pile testing result is accurate, the tonnage of the pile loading object 6 of the test pile is greatly reduced, and the pile loading engineering quantity is reduced; and after the test pile is finished and the foundation pit is excavated, the loading device 3 can be excavated and recovered, and can be repeatedly utilized when the next test pile is carried out, so that the purpose of reasonably utilizing resources is achieved.
In the embodiment of the utility model, the pile top of the first pile section 1 is flush with the pile top elevation position of the designed pile foundation, and the loading device 3 is arranged at the pile top of the first pile section 1, so that the pile testing result obtained in the pile testing process is the test value from the pile top to the pile bottom of the pile foundation, the pile testing result is accurate and conversion is not needed; the pile testing process is carried out on the ground, so that the exposure time of the foundation pit is reduced, and the safety of the foundation pit is improved; meanwhile, the tonnage of the test pile stacking load 6 can be greatly reduced by ground test piles, and the stacking load is reduced.
Further, the foundation pit pile testing method further comprises the following steps: arranging a loading plate 4 at the position where the pile body is flush with the pit top of the foundation pit to be excavated, namely arranging the loading plate 4 at the shield mounting position of the second pile section 2; because data do not need to be read at the bottom of the loading plate 4, the loading plate 4 does not need to be overhead as in a common stacking method, namely, the pile top of the second pile section 2 is reliably connected with the loading plate 4; and the load 6 is placed on the loading plate 4 so that the first pile section 1 is loaded by the load 6.
Further, the foundation pit pile testing method further comprises the following steps: a data reading box 5 is arranged at the top of a foundation pit to be excavated, and a loading force reading component in the data reading box 5 is connected with a loading device 3. For example, the loading force reading components within the data reading compartment 5 include interconnected force sensors and displays; for example, the force sensor is arranged at the connection of the loading device 3 and the first pile section 1, and the display is arranged on the ground; the loading force value of the loading device 3 can be obtained in real time through the loading force reading component, and then the bearing force value of the first pile section 1 in the pile testing process is obtained.
Further, the foundation pit pile testing method further comprises the following steps: the displacement reading means in the data reading box 5 is connected to the loading device 3. For example, the displacement reading means in the data reading box 5 includes a displacement sensor and a display connected to each other; for example, the displacement sensor is arranged at the connection of the loading device 3 and the first pile section 1, and the display is arranged on the ground; the displacement situation at the loading device 3 can be obtained in real time by the displacement reading means.
Wherein, the stacking value of the stacking object 6 is determined according to the bearing force value of the first pile section 1, the negative friction resistance value of the second pile section 2 and the self weight value of the second pile section 2; wherein, the bearing capacity value of the first pile section 1 and the negative frictional resistance value of the second pile section 2 are determined according to the geological survey parameters. That is, the reaction force of the upper portion of the loading device 3 is provided by both the negative frictional resistance of the second pile section 2 and its own weight, and the own weight of the stacked object 6. In the process of pile testing, the bearing capacity characteristic value of the pile foundation (namely, the bearing capacity characteristic value of the first pile section 1) and the negative friction resistance value between the second pile section 2 and the surrounding soil body can be estimated according to the geological survey parameters; that is, the stacking value of the stacked object 6 can be determined according to the bearing force value of the first pile section 1, the negative friction resistance value of the second pile section 2 and the self-weight value of the second pile section 2; for example, the stacking load value of the stacking load 6 is the load bearing value of the first pile segment 1, the negative friction resistance value of the second pile segment 2, and the self weight value of the second pile segment 2. And current test pile in-process, if adopt ground test pile, pile and carry thing 6 and pile and carry value 1's bearing capacity value + the frictional resistance value of second stake section 2 of first stake section, owing to can know, the utility model provides a test pile method can reduce the pile weight of carrying of test pile in-process by a wide margin, especially under the darker condition of foundation ditch, and the reduction effect of pile weight is more obvious.
Further, the foundation pit pile testing method further comprises the following steps: and excavating the foundation pit after the pile test is finished, and meanwhile, excavating and recovering the loading device 3. The pile testing method can be used for pile testing and pile detection before construction, and if the pile testing method is adopted for pile testing before construction, pit excavation can be performed after pile testing is completed, a foundation pit bottom plate can be quickly formed after foundation pit excavation, exposure risks of the foundation pit bottom plate are reduced, and safety of a foundation pit is improved; meanwhile, in the process of excavation of the foundation pit, the loading device 3 pre-embedded at the bottom of the foundation pit can be excavated, so that the loading device 3 can be recycled, and the effect of reasonable utilization of resources is achieved.
In addition, when the pile testing method is used for testing the pile before construction, the bearing capacity of the first pile section can be fully embodied by adjusting the loading weight of the piled loading object, and the situation that the bearing capacity of the first pile section cannot be fully utilized due to more differences of geological survey reports or other reasons is avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The utility model provides a foundation ditch test pile structure which characterized in that includes: the pile loading device comprises a first pile section, a loading device, a second pile section and a stacking object;
the pile top of the first pile section is positioned at the bottom of the foundation pit to be excavated, and the pile top of the first pile section is connected with one side of the loading device;
the opposite side of the loading device is connected with the pile bottom of the second pile section, and the pile top of the second pile section is positioned at the pit top of the foundation pit to be excavated;
the stacking object is arranged at the pile top of the second pile section and used for loading the first pile section.
2. The foundation pit pile testing structure according to claim 1, further comprising: a data reading box; the data reading box comprises a loading force reading component connected with the loading device, and the loading force reading component is used for reading the loading force of the loading device.
3. The foundation pit pile testing structure according to claim 2, wherein the loading force reading member includes: a force sensor and a first display structure coupled;
the force sensor is arranged on one side, close to the first pile section, of the loading device, and the first display structure is arranged near the top of the pit to be excavated.
4. The foundation pit pile testing structure according to claim 2, wherein the data reading box comprises: and the displacement reading component is connected with the loading device and is used for reading the displacement value of the loading device.
5. The foundation pit pile testing structure according to claim 4, wherein the displacement reading means comprises: the displacement sensor and the second display structure are connected;
the displacement sensor is arranged on one side, close to the first pile section, of the loading device, and the second display structure is arranged near the top of the pit to be excavated.
6. The foundation pit pile testing structure according to claim 1, further comprising: a loading plate;
one side of the loading plate is connected with the pile top of the second pile section, and the ballast is arranged on the opposite side of the loading plate.
7. A foundation pit pile testing structure according to any one of claims 1-6, wherein the loading device comprises a jack.
8. The foundation pit pile testing structure according to any one of claims 1 to 6, wherein the first pile section has a circular cross-sectional shape, the second pile section has a circular cross-sectional shape, and the loading device has an annular cross-sectional shape.
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| CN201920243145.2U CN209837122U (en) | 2019-02-26 | 2019-02-26 | Foundation pit pile testing structure |
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| CN201920243145.2U CN209837122U (en) | 2019-02-26 | 2019-02-26 | Foundation pit pile testing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826247A (en) * | 2019-02-26 | 2019-05-31 | 中铁第四勘察设计院集团有限公司 | Foundation pit test pile structure and foundation pit pile testing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826247A (en) * | 2019-02-26 | 2019-05-31 | 中铁第四勘察设计院集团有限公司 | Foundation pit test pile structure and foundation pit pile testing method |
| CN109826247B (en) * | 2019-02-26 | 2024-04-16 | 中铁第四勘察设计院集团有限公司 | Foundation pit pile testing structure and foundation pit pile testing method |
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