Test pile static load eccentric reaction force detection structure

Abstract

The utility model relates to a test pile static load eccentric counter-force detection structure, and relates to the technical field of building equipment, the test pile static load eccentric counter-force detection structure comprises a counterweight mechanism, a support mechanism and a counter-force mechanism, the counterweight mechanism is formed by stacking a plurality of counterweight blocks; the supporting mechanism is used for supporting the balance weight mechanism so as to bear the pressure corresponding to the balance weight mechanism. One end of the counter-force mechanism abuts against and is fixed to a to-be-tested test pile, the end away from the to-be-tested test pile corresponds to the supporting mechanism, and the counter-force mechanism is used for applying counter-force to the supporting mechanism to resist the corresponding pressure of the counterweight mechanism. The counter-force mechanism is close to the edge of one side of the supporting mechanism. The device has the effect of testing the bearing capacity of the test pile under the existing building.

Description

Technical Field

[0001] The present application relates to the field of construction equipment, and in particular to a test pile static load eccentric reaction force detection structure. Background Art

[0002] Vertical compressive static load test refers to a test method that applies vertical pressure step by step to the top of the pile, observes the settlement displacement of the top of the pile over time, and determines the corresponding single pile vertical compressive bearing capacity. Its purpose is to use a test method close to the actual working conditions to determine the vertical (compressive) ultimate bearing capacity of the test pile, provide a basis for design, or conduct sampling inspection of the bearing capacity of engineering piles to provide and evaluate the project acceptance. Commonly used reaction devices include weight platform reaction device, anchor pile crossbeam reaction device, anchor pile weight combined reaction device and ground anchor reaction device.

[0003] The counterforce device of the weight platform is generally arranged above the pile to be tested, and the counterweights are stacked on the weight platform to provide the pressure required for the test. For the safety of the test, the center of the weight platform is directly opposite to the test pile, and the counterweights on the weight platform are evenly stacked, and the center of gravity of the counterweight is basically directly above the weight platform to prevent the counterweight from tipping over.

[0004] The above-mentioned reaction force detection structure is suitable for situations where the on-site conditions are good, and requires sufficient loading space above the weight platform to stack the counterweight blocks. However, for some special situations, such as when the building base plate has been closed and part of the building superstructure has been constructed in place, doubts arise about the quality of the foundation piles in the subsequent process and they need to be tested again. At this time, the space above the piles to be tested is severely limited, and the height and number of counterweight blocks that can be placed are insufficient. The loading gravity required for testing the foundation piles cannot meet the conditions. If the formed building superstructure is to be dismantled, the cost of testing the foundation piles will be too high. Utility Model Content

[0005] The purpose of this application is to provide a detection structure for testing the bearing capacity of test piles under existing buildings.

[0006] The present application provides a test pile static load eccentric reaction force detection structure, which adopts the following technical solution:

[0007] A test pile static load eccentric reaction force detection structure comprises: a counterweight mechanism, the counterweight mechanism comprises a plurality of stacked counterweight blocks, the plurality of counterweight blocks are stacked outside a building, and the gravity of the counterweight mechanism is used as the power for static load test; a support mechanism, the support mechanism comprises a first pier, a second pier and a weight platform, the first pier is inside the building, the second pier is outside the building, the weight platform is placed on the first pier and the second pier, and the counterweight mechanism is placed above the second pier outside the building; a reaction mechanism, the reaction mechanism is located below the weight platform, and the reaction mechanism is located inside the building near the first pier, the reaction mechanism is placed on the test pile, and the top of the reaction mechanism abuts against the bottom surface of the weight platform; the reaction mechanism, the weight platform and the second pier form a lever structure with the gravity of the counterweight mechanism, the reaction mechanism is perpendicular to the upward lifting force of the weight platform, and the gravity of the counterweight mechanism forms a laborious lever with the second pier as the fulcrum.

[0008] By adopting the above technical scheme, compared with the current detection method of placing the center of gravity of the superimposed counterweight blocks directly above the test pile when testing the test pile, the present application can measure the test pile again when a bottom plate has been formed above the test pile and a top building has been formed above the bottom plate. For the pile to be tested, it is only necessary to break part of the bottom plate on the test pile, place the reaction mechanism above the test pile, use the second pier as the fulcrum, and use the pressure of the counterweight mechanism on the weight platform as the power, and the lifting force of the reaction mechanism as the resistance. The center of gravity of the counterweight mechanism is offset to the center position of the weight platform close to the second pier. The power arm between the gravity of the counterweight mechanism and the second pier is smaller than the resistance arm between the lifting force of the reaction mechanism and the second pier. The reaction mechanism, the weight platform and the second pier form a laborious lever structure to test the test pile.

[0009] Optionally, the reaction mechanism includes a main beam and a jack, the jack is placed on the upper surface of the test pile accordingly, the jack is used to lift in the vertical direction to apply a reaction force, the main beam is placed between the jack and the ballast platform, and the main beam is parallel to the first pier and the second pier.

[0010] By adopting the above technical solution, the main beam is lifted upward by the jack to apply a reaction force to the test pile. The main beam is arranged between the jack and the weight platform, which increases the structural strength of the force-bearing surface lifted by the jack.

[0011] Optionally, the ballast platform includes a plurality of secondary beams, the plurality of secondary beams are arranged at intervals, and the plurality of secondary beams are all perpendicular to the piers.

[0012] By adopting the above technical solution, several secondary beams are placed to expand the area of ​​the ballast platform and the area bearing the counterweight blocks, which can increase the weight of the counterweight blocks stacked on the ballast platform. Several secondary beams are placed perpendicular to the piers to achieve maximum balance of the ballast plane and prevent the ballast platform from tilting.

[0013] Optionally, the first buttress and the second buttress are at different distances from the test pile.

[0014] By adopting the above technical solution, the pile to be tested is close to the first pier, and the farther the test pile is from the second pier, the larger the resistance arm of the force lever is.

[0015] Optionally, the center of force of the jack coincides with the center axis of the test pile.

[0016] By adopting the above technical solution, the reaction force applied by the jack to the test pile can act vertically on the test pile to test the test pile.

[0017] Optionally, an abutting steel plate is provided between the jack and the test pile.

[0018] By adopting the above technical solution, the abutment steel plate is placed between the jack and the test pile. The abutment steel plate prevents the pile from exploding due to the small contact surface between the jack and the test pile when the jack is lifting, increases the force-bearing foundation area between the jack and the test pile, and protects the structural strength of the test pile.

[0019] Optionally, both sides of the secondary beam are provided with snap-in grooves corresponding to the first buttress and the second buttress, and the snap-in grooves are used for positioning the first buttress and the second buttress when they are placed.

[0020] By adopting the above technical solution, the clamping groove can achieve a rapid positioning effect on the first buttress and the second buttress on both sides of the secondary beam during installation.

[0021] Optionally, the ballast platform further includes surrounding columns corresponding to the secondary beams, wherein the surrounding columns are perpendicular to the ballast platform and are used for stacking and protecting a plurality of the counterweight blocks.

[0022] By adopting the above technical solution, a plurality of surrounding columns are vertically arranged on the ballast platform to surround and protect a plurality of counterweight blocks, thereby preventing the stacked counterweight blocks from scattering.

[0023] Optionally, a positioning groove is provided at one end of the surrounding column, and a plurality of binding grooves are provided on the peripheral wall from the top to the bottom of the surrounding column. The width of the positioning groove corresponds to the width of the secondary beam, and the surrounding column is snap-fitted to the secondary beam through the positioning groove.

[0024] By adopting the above technical solution, the surrounding column is clamped on the secondary beam through the positioning groove, the width of the positioning groove corresponds to the width of the secondary beam, and the clearance between the positioning groove on the surrounding column and the secondary beam is matched to achieve positioning. The counterweight block is wrapped by the Kuangbang groove on the surrounding columns on both sides of the counterweight mechanism through ropes to prevent it from falling off.

[0025] In summary, this application includes the following beneficial technical effects:

[0026] In the case where there is an existing building on the test pile, the test pile can be tested for bearing capacity again without demolishing the existing building during the test. The present application forms an effortful lever structure to test the test pile by stacking counterweights on the outside of the building, and the height of the stacked counterweights is not limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0028] Figure 2 is a schematic diagram of the top view of the structure of Example 1 of the present application;

[0029] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the AA section;

[0030] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of the middle BB section;

[0031] Figure 5 This is a schematic diagram of the main structure of Example 2 of the present application;

[0032] Figure 6 is a schematic diagram of the three-dimensional structure of the surrounding column in Example 2 of the present application;

[0033] In the figure, 1, test pile; 2, counterweight mechanism; 21, counterweight block; 3, supporting mechanism; 31, weight platform; 311, secondary beam; 3111, clamping groove; 312, surrounding column; 3121, positioning groove; 3122, binding groove; 32, first pier; 33, second pier; 4, reaction mechanism; 41, main beam; 42, jack; 421, fixing part; 422, lifting part; 43, abutting steel plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0035] In the related art, the test pile 1 is partially embedded in the ground when the foundation of the building is constructed. When an existing building is formed above the test pile 1, the test pile 1 is at the center position of the reaction device of the weight platform 31 during the test of the test pile 1. The center position is located inside the building. The top of the building limits the stacking height of the counterweight block 21. The bearing capacity of the test pile 1 cannot be retested without demolishing the existing building.

[0036] The present application discloses a static load eccentric reaction force detection structure for a test pile 1, and specifically discloses the following embodiments:

[0037] Example 1: Figure 1 As shown, it includes a counterweight mechanism 2, a support mechanism 3 and a reaction mechanism 4.

[0038] The counterweight mechanism 2 includes a plurality of stacked counterweight blocks 21, and the plurality of counterweight blocks 21 are stacked outside the building.

[0039] The supporting mechanism 3 includes a first buttress 32, a second buttress 33 and a weight platform 31. The first buttress 32 is inside the building, the second buttress 33 is outside the building, the weight platform 31 is placed on the first buttress 32 and the second buttress 33, and the counterweight mechanism 2 is placed outside the building and above the second buttress 33;

[0040] The supporting mechanism 3 is used to support the counterweight mechanism 2 to withstand the corresponding pressure of the counterweight mechanism 2 .

[0041] The reaction mechanism 4 is located below the weight platform 31 and is located in the building near the first pier 32. The reaction mechanism 4 is placed on the test pile 1, and the top of the reaction mechanism 4 abuts against the bottom surface of the weight platform 31;

[0042] The reaction mechanism 4 is used to apply a reaction force to the support mechanism 3 to counteract the pressure of the counterweight mechanism 2 .

[0043] One end of the support mechanism 3 is placed above the test pile 1 in the building, so that only a portion of the support mechanism 3 is in the building structure, and most of the length of the support mechanism 3 is outside the building. The test pile 1 is close to the first pier 32 in the building, and the gravity of the counterweight mechanism 2 is applied to the support mechanism 3, and the center of the counterweight mechanism 2 is different from the center of the support mechanism 3. The center of gravity of the counterweight mechanism 2 is close to the second pier 33, and the reaction mechanism 4 is between the test pile 1 and the support mechanism 3. The reaction mechanism 4, the weight platform 31 and the second pier 33 have a great impact on the counterweight mechanism. The gravity of the counterweight mechanism 2 forms a lever structure, and the gravity of the counterweight mechanism 2 is used as the power for the static load test; the lifting force of the reaction mechanism 4 is used as the resistance, the distance between the center of gravity of the counterweight mechanism 2 and the second pier 33 is the power arm, the distance between the contact point of the reaction mechanism 4 and the weight platform 31 and the second pier 33 is the resistance arm, the reaction mechanism 4 is a vertical lifting force of the weight platform 31, and the gravity of the counterweight mechanism 2 forms a laborious lever with the second pier 33 as the fulcrum; by increasing the lifting force of the reaction mechanism 4, it is judged whether the bearing capacity of the test pile 1 is qualified.

[0044] like Figure 2 As shown, in this embodiment, the counterweight mechanism 2 is formed by a plurality of counterweight blocks 21 stacked in an interlaced manner.

[0045] Specifically, the counterweight block 21 is a square column, and the square columns are staggered when stacked to prevent the counterweight block 21 from tilting to one side and falling off.

[0046] The counterweight mechanisms 2 are all stacked on the upper surface of the support mechanisms 3 extending outside the building.

[0047] like Figure 3 As shown, C in the figure is the wall structure of the existing building. In this embodiment, the supporting mechanism 3 includes a weight platform 31 and two piers. The piers are placed on the ground and the piers support the weight platform 31 on both sides of the bottom of the weight platform 31. A part of the weight platform 31 is inside the wall, and a part is outside the wall.

[0048] Specifically, the first buttress 32 is placed inside the building and is closer to the inside of the building than the test pile 1 , and the second buttress 33 is placed outside the building and is parallel to the first buttress 32 inside.

[0049] The ballast platform 31 is placed on the first pier 32 and the second pier 33. The ballast platform 31 runs through the inside and outside of the building. One end of the ballast platform 31 is inside the building and the other end is outside the building. The length outside the building is much greater than the length inside the building.

[0050] In this embodiment, the weight platform 31 is composed of a plurality of secondary beams 311 arranged side by side, and the interval between every two secondary beams 311 is the same.

[0051] The secondary beams 311 are all perpendicular to the two piers, and the vertical layout structure between the secondary beams 311 and the piers increases the stability of the supporting structure.

[0052] Specifically, both sides of the long end of each secondary beam 311 are provided with engaging grooves 3111 corresponding to the width of the first pier 32 and the second pier 33 .

[0053] The snap-in groove 3111 is used to position the pier when it is placed. A first pier 32 is placed in the building, and the snap-in groove 3111 on one side of the secondary beam 311 corresponds to the first pier 32. During installation, the first pier 32 is snapped into the snap-in groove 3111, and a second pier 33 is placed in the snap-in groove 3111 on the outside of the building on the secondary beam 311. A limit is formed in the snap-in groove 3111 to prevent sliding displacement between the secondary beam 311 and the first pier 32 and the second pier 33.

[0054] like Figure 4 As shown, in this embodiment, the reaction mechanism 4 includes a jack 42 and a main beam 41 . The jack 42 is placed on the top of the test pile 1 to be tested, and the main beam 41 abuts against the jack 42 .

[0055] The main beam 41 is arranged near the first pier 32 inside the building, and the position of the main beam 41 corresponds to the test pile 1 to be tested.

[0056] Specifically, the jack 42 includes a fixing portion 421 and a lifting portion 422 , and the central axis of the lifting portion 422 of the jack 42 coincides with the central axis of the test pile 1 .

[0057] The jacks 42 are placed on the test piles 1 , and the number of the jacks 42 corresponds to the number of the test piles 1 .

[0058] In other embodiments, the test pile 1 may also correspond to different numbers of jacks 42 .

[0059] The fixing part 421 is a cylinder, the bottom end of which is placed on the upper surface of the test pile 1 , and the lifting part 422 is a cylinder with a diameter smaller than that of the fixing part 421 and moves along the central axis in the fixing part 421 .

[0060] In this embodiment, an abutting steel plate 43 is placed between the fixing portion 421 and the test pile 1 .

[0061] The abutting steel plate 43 is a square steel plate with a width greater than that of the main beam 41. The width of the abutting steel plate 43 is greater than the diameter of the jack 42. When the lifting part 422 applies force upward, the lifting force is completely transferred to the fixing part 421, and then transferred to the test pile 1 by the fixing part 421. The abutting steel plate 43 between the fixing part 421 and the test pile 1 prevents the fixing part 421 from excessively concentrating the force on the upper surface of the test pile 1, causing the risk of the test pile 1 exploding. The abutting steel plate 43 between the fixing part 421 and the test pile 1 increases the stability of the jack 42 during lifting.

[0062] During the lifting and loading process of the jack 42 , the main beam 41 , the weight platform 31 and the second pier 33 form a lever structure, and the upward lifting force of the jack 42 acts on the test pile 1 in the same and opposite direction.

[0063] The implementation principle of the embodiment of the present application is as follows: a first pier 32 is placed inside the building along the direction from the outside of the building to the test pile 1 close to the inside of the building, abutting steel plates 43, jacks 42 and main beams 41 are placed on the test piles 1 in sequence, a weight platform 31 is placed on the first pier 32 inside the building, the clamping groove 3111 on the secondary beam 311 is matched with the first pier 32, so that most of the weight platform 31 is placed outside the building, and a second pier 32 is placed on the clamping groove 3111 at the other end of the secondary beam 311. Pier 33, pile enough counterweight blocks 21 on the weight platform 31 outside the building, and then apply a lifting force to the jack 42, the main beam 41 pushes the weight platform 31 upward through the jack 42, and the lifting force of the jack 42 is reversely transmitted vertically downward to the test pile 1, and the main beam 41, the weight platform 31 and the second pier 33 outside the building constitute a laborious lever structure, the fulcrum is the second pier 33 outside the building, the power is the load borne by the weight platform 31, and the resistance is the lifting force of the jack 42.

[0064] Embodiment 2:

[0065] like Figure 5 As shown, in this embodiment, on the basis of the embodiment, a plurality of surrounding columns 312 are added in the direction perpendicular to the weight platform 31, and the surrounding columns 312 prevent the counterweight blocks 21 from scattering when the counterweight blocks 21 are stacked.

[0066] Specifically, the surrounding column 312 is a cylinder, the diameter of the surrounding column 312 is greater than the width of the secondary beam 311 , and the surrounding column 312 is placed perpendicular to the secondary beam 311 .

[0067] like Figure 6 As shown, a positioning groove 3121 is opened at one end of the surrounding column 312. The positioning groove 3121 is a square groove opened at one end surface of the surrounding column 312. The positioning groove 3121 extends into the surrounding column 312 along one end surface of the surrounding column 312, and the positioning groove 3121 passes through the peripheral wall of the surrounding column 312.

[0068] Specifically, the width of the positioning groove 3121 is the same as the width of the secondary beam 311 . When the surrounding column 312 and the secondary beam 311 are in a mating state, the positioning groove 3121 is snapped onto the secondary beam 311 to be positioned and fixed with the secondary beam 311 .

[0069] A plurality of binding grooves 3122 are provided on the peripheral wall from the top to the bottom of the surrounding column 312 .

[0070] Specifically, the diameter of the binding groove 3122 is smaller than the diameter of the surrounding column 312 .

[0071] The plurality of binding grooves 3122 are located at different heights. Ropes can be wound around the binding grooves 3122 at different positions according to the stacking height of the counterweights 21 to surround the counterweights 21 .

[0072] Each surrounding column 312 is correspondingly installed on both sides of the counterweight mechanism 2 along the length direction of the secondary beam 311 , and the plurality of surrounding columns 312 wrap the counterweight mechanism 2 .

[0073] In other embodiments, after a plurality of surrounding columns 312 are installed around the counterweight mechanism 2 , ropes may be used to wrap around the surrounding columns 312 on both sides to further enhance the fixing effect of the surrounding columns 312 on the counterweight mechanism 2 .

[0074] The implementation principle of the embodiment of the present application is as follows: when the reaction mechanism 4 and the support mechanism 3 are installed and the counterweight mechanism 2 is placed, a surrounding column 312 is installed on the weight platform 31 outside the building near the secondary beam 311 of the building, and the positioning groove 3121 is vertically inserted into the secondary beam 311 in conjunction with the secondary beam 311 to form a barrier between the counterweight mechanism 2 and the wall of the existing building. A surrounding column 312 is also installed on the side of the secondary beam 311 away from the building wall, and the counterweight block 21 is stacked between the two surrounding columns 312. The surrounding columns 312 on both sides can position the counterweight blocks 21 when they are stacked. As the stacking height of the counterweight blocks 21 increases, ropes are used to wrap around the binding grooves 3122 of different heights on the surrounding columns 312 on both sides of the counterweight mechanism 2 to wrap the counterweight blocks 21 to prevent them from scattering when they are stacked too high.

[0075] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A test pile static load eccentric reaction force detection structure, used for static load testing of test piles in existing buildings, characterized in that: include: A counterweight mechanism (2), the counterweight mechanism (2) comprising a plurality of stacked counterweight blocks (21), the plurality of counterweight blocks (21) being stacked outside the building, the gravity of the counterweight mechanism (2) being used as a driving force for a static load test; A support mechanism (3), the support mechanism (3) comprising a first buttress (32), a second buttress (33) and a weight platform (31), the first buttress (32) being inside the building, the second buttress (33) being outside the building, the weight platform (31) being placed on the first buttress (32) and the second buttress (33), and the counterweight mechanism (2) being placed outside the building above the second buttress (33); A reaction mechanism (4), the reaction mechanism (4) being located below the ballast platform (31), and the reaction mechanism (4) being located in the building near the first pier (32), the reaction mechanism (4) being placed on the test pile (1), and the top of the reaction mechanism (4) being in contact with the bottom surface of the ballast platform (31); The reaction mechanism (4), the weight platform (31) and the second buttress (33) form a lever structure for the gravity of the counterweight mechanism (2); the reaction mechanism (4) is a vertical lifting force of the weight platform (31), and the gravity of the counterweight mechanism (2) forms a laborious lever with the second buttress (33) as a fulcrum.

2. A test pile static load eccentric reaction force detection structure according to claim 1, characterized in that: The reaction mechanism (4) comprises a main beam (41) and a jack (42), wherein the jack (42) is placed on the upper surface of the test pile (1) and is used to lift the pile in a vertical direction to apply a reaction force, and the main beam (41) is placed between the jack (42) and the ballast platform (31), and the main beam (41) and the first buttress (32) and the second buttress (33) are parallel to each other.

3. A test pile static load eccentric reaction force detection structure according to claim 1, characterized in that: The ballast platform (31) comprises a plurality of secondary beams (311), the plurality of secondary beams (311) are arranged at intervals, and the plurality of secondary beams (311) are all perpendicular to the buttress.

4. A test pile static load eccentric reaction force detection structure according to claim 1, characterized in that: The first buttress (32) and the second buttress (33) are at different distances from the test pile (1).

5. A test pile static load eccentric reaction force detection structure according to claim 2, characterized in that: The center of force of the jack (42) coincides with the center axis of the test pile (1).

6. A test pile static load eccentric reaction force detection structure according to claim 2, characterized in that: An abutting steel plate (43) is provided between the jack (42) and the test pile (1).

7. A test pile static load eccentric reaction force detection structure according to claim 3, characterized in that: The secondary beam (311) is provided with clamping grooves (3111) corresponding to the first buttress (32) and the second buttress (33) on both sides, and the clamping grooves (3111) are used for positioning the first buttress (32) and the second buttress (33) when they are placed.

8. The test pile static load eccentric reaction force detection structure according to claim 1, characterized in that: The ballast platform (31) further comprises a plurality of surrounding columns (312) corresponding to the secondary beam (311), wherein the plurality of surrounding columns (312) are perpendicular to the ballast platform (31), and the surrounding columns (312) are used to stack and protect the plurality of counterweight blocks (21).

9. A test pile static load eccentric reaction force detection structure according to claim 8, characterized in that: A positioning groove (3121) is provided at one end of the surrounding column (312), and a plurality of binding grooves (3122) are provided on the peripheral wall of the surrounding column (312) from the top to the bottom, the width of the positioning groove (3121) corresponds to the width of the secondary beam (311), and the surrounding column (312) is snap-fitted to the secondary beam (311) via the positioning groove (3121).

Images