Pile repairing bearing capacity detection device

Abstract

The invention discloses a pile repairing bearing capacity detection device which comprises a counter-force frame, a counter-force cross beam, a load loading mechanism and displacement detection equipment. The counter-force frame is arranged above a to-be-detected pile, and the bottoms of the two sides of the counter-force frame are connected with the ground; the counter-force cross beam is horizontally arranged, and two ends are connected with the counter-force frame; the upper end of the load loading mechanism is mounted on the counter-force cross beam; the driving end of the load loading mechanism is connected with the upper end of the repairing pile through the lower base plate; the displacement detection device is fixed on the reference assembly, and the measuring end of the displacement detection device is in contact with the upper surface of the lower base plate. The device has the beneficial effects that the jack is reliably connected with the counter-force frame by utilizing the ground anchor and the counter-force frame for pile repairing construction in the existing building reinforcement and transformation process, so that the detection of the pile repairing bearing capacity in the existing building reinforcement process is realized; compared with a traditional detection mode, a complex counter-force device does not need to be additionally built, and the problems that indoor space of an existing building is limited, the floor height is insufficient, and the site is narrow are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of building engineering detection, and particularly relates to a device for detecting the bearing capacity of supplementary piles. Background Art

[0002] During the acceptance of the bearing capacity quality of building engineering pile foundations, when the use nature and building functions change due to force majeure factors during the construction of existing buildings, etc., it is necessary to change the structural form and design. For example, by adding supplementary piles, the overall reliability of the structure is increased to meet the relevant bearing capacity requirements of the relevant design changes.

[0003] Traditional methods for detecting the bearing capacity of pile foundations generally use counterweights erected on the upper part of the test piles as reaction forces, and the loading jack transfers the force to the counterweights through a cross beam. This method is mostly used for pile foundation detection during the construction of new buildings, where hoisting is convenient, the site is open, and the conditions for stacking counterweights are met. However, during the construction of existing buildings, when the use nature and building functions change due to force majeure factors, it is necessary to change the structural form and design. For example, by adding supplementary piles to increase the overall reliability of the structure. At this time, when using the traditional stacking method for detecting the bearing capacity of supplementary piles, it is limited by the building height, site constraints, and the hoisting and transportation limitations of counterweights inside the building, and it is difficult to be applicable to the detection of the bearing capacity of supplementary piles inside existing buildings.

[0004] Therefore, it is very necessary to design a device that can detect the bearing capacity of supplementary piles during the reinforcement and renovation of existing buildings. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for detecting the bearing capacity of supplementary piles, aiming at the deficiencies of the existing technology, to detect the bearing capacity of supplementary piles during the reinforcement and renovation of existing buildings.

[0006] The technical solution adopted by the present invention is: a device for detecting the bearing capacity of supplementary piles, including a reaction frame, a reaction cross beam, a load loading mechanism, and a displacement detection device; The reaction frame is arranged above the supplementary pile to be detected, and the two bottom sides of the reaction frame are connected to the ground; The reaction cross beam is horizontally arranged, and both ends are connected to the reaction frame; The upper end of the load loading mechanism is installed on the reaction cross beam; the driving end of the load loading mechanism is connected to the upper end of the supplementary pile through a lower backing plate; The displacement detection device is fixed on the reference assembly, and the measuring end of the displacement detection device is in contact with the upper surface of the lower backing plate.

[0007] According to the above solution, the supplementary pile bearing capacity detection device is also provided with a reference component, and the reference component includes a reference pile and a reference cross beam; there are two groups of reference piles, which are respectively arranged on both sides of the reaction frame, and the lower ends of the reference piles are fixed to the ground; the reference cross beam is horizontal, and both ends of the reference cross beam are respectively connected to the two reference piles; the displacement detection device is fixed on the reference cross beam, and the displacement detection device is located above the lower cushion plate, and the measuring end of the displacement detection device contacts the upper surface of the lower cushion plate.

[0008] According to the above solution, the load loading mechanism is a jack.

[0009] According to the above solution, the displacement detection device is a displacement gauge.

[0010] According to the above solution, the reaction frame includes two columns arranged on both sides of the supplementary pile, and a connecting beam connecting the tops of the two columns; both ends of the reaction cross beam are respectively connected to the two columns.

[0011] According to the above solution, the lower end of the column is provided with a base, and the base is fixed to the ground through a ground anchor.

[0012] According to the above solution, the upper end of the jack is connected to the reaction cross beam through an upper cushion plate.

[0013] According to the above solution, the supplementary pile bearing capacity detection device further includes a controller, and the controller is respectively connected to the displacement gauge and the jack.

[0014] According to the above solution, the upper cushion plate is a steel cushion plate.

[0015] According to the above solution, the lower cushion plate is a steel cushion plate.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention utilizes the ground anchor and reaction frame during the supplementary pile construction in the process of strengthening and reconstructing existing buildings to reliably connect the jack with the reaction frame, thereby realizing the detection of the bearing capacity of the supplementary pile during the strengthening of existing buildings; compared with the traditional detection method, there is no need to additionally build a complex reaction device, which solves the problems restricted by the indoor space, insufficient floor height and narrow site of existing buildings, and makes full use of the existing construction resources, avoiding repeated investment and improving the detection efficiency.

[0017] 2. The present invention designs rigid upper and lower cushion plates to ensure small deformation during load application and meet the stiffness requirements of detection; the reference piles and reference cross beams are stably supported and have sufficient stiffness, and do not displace during the static load process; the displacement gauge, jack and controller ensure the accuracy and reliability of the detection system.

[0018] 3. The structure of the present invention is reasonably designed and easy to operate. Description of the Drawings

[0019] Figure 1 This is the overall structural schematic diagram of the first embodiment in the present invention.

[0020] Among them: 1. Reaction frame; 2. Reaction cross beam; 3. Upper backing plate; 4. Lower backing plate; 5. Jack; 6. Supplementary pile; 7. Ground anchor; 8. Reference pile; 9. Reference cross beam; 10. Displacement gauge; 11. Base. Specific implementation manners

[0021] The present invention will be further clarified below in conjunction with the accompanying drawings and specific implementation manners. It should be understood that these implementation manners are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art to the present invention all fall within the scope defined by the appended claims of this application.

[0022] First embodiment As Figure 1 shown, a supplementary pile bearing capacity detection device, specifically a supplementary pile bearing capacity detection device for the reinforcement and reconstruction of existing buildings, includes a reaction frame 1, a reaction cross beam 2, a load loading mechanism, and a displacement detection device; The reaction frame 1 is arranged above the supplementary pile 6 to be detected, and the two bottom sides of the reaction frame 1 are connected to the ground; The reaction cross beam 2 is horizontally arranged, and both ends are connected to the reaction frame 1; The upper end of the load loading mechanism is installed on the reaction cross beam 2; the lower end of the load loading mechanism is the driving end, and the driving end is vertically downward and is connected to the upper end of the supplementary pile 6 through the lower backing plate 4; The displacement detection device is fixed on the reference assembly, and the measuring end of the displacement detection device contacts the upper surface of the lower backing plate 4.

[0023] In the present invention, the lower backing plate 4 is arranged on the top of the supplementary pile 6, and the load loading mechanism applies a vertical load to the supplementary pile 6 through the lower backing plate 4; the displacement detection device is used to detect the vertical displacement of the supplementary pile 4.

[0024] Preferably, the supplementary pile bearing capacity detection device is further provided with a reference assembly, and the reference assembly includes a reference pile 8 and a reference cross beam 9; there are two groups of reference piles 8, which are respectively arranged on both sides of the reaction frame 1, and the lower ends of the reference piles 8 are fixed to the ground; the reference cross beam 9 is horizontal, and both ends of the reference cross beam 9 are respectively connected to the two reference piles 8; the displacement detection device is fixed on the reference cross beam 9, and the displacement detection device is located above the lower backing plate 4, and the measuring end of the displacement detection device contacts the upper surface of the lower backing plate 4.

[0025] In the present invention, the lower end of the reference pile 8 can be inserted below the ground, at a certain distance from the supplementary pile 6, and has sufficient stiffness to ensure that the displacement detection device installed on the reference cross beam 9 is not affected by the soil disturbance during the loading process of the supplementary pile 6.

[0026] Preferably, the load loading mechanism is a jack 5. The upper end of the jack 5 is connected to the bottom of the reaction cross beam 2 through an upper backing plate 3. The lower end of the jack 5 is the driving end, and is connected to the top of the additional pile 6 through a lower backing plate 4 to apply a vertical load to the additional pile 6.

[0027] In the present invention, both the upper backing plate 3 and the lower backing plate 4 are steel backing plates.

[0028] Preferably, the displacement detection device is a displacement meter 10, specifically a laser displacement meter, which is used to detect the displacement of the additional pile 6.

[0029] Preferably, the reaction frame 1 includes two columns arranged on both sides of the additional pile 1, and a connecting beam connecting the tops of the two columns; the lower ends of the columns are provided with bases 11, and the bases 11 are fixed to the ground through ground anchors 7; the two ends of the reaction cross beam 2 are respectively connected to the two columns.

[0030] In the present invention, the reaction frame 1 provides a supporting function for the entire device. The reaction frame 1 is provided with round holes adapted to the pins, and the end of the reaction cross beam 2 is connected to the reaction frame 1 through the pins; multiple groups of round holes are arranged in the height direction on the reaction frame 1, and the reaction cross beam 2 can be arranged according to the specific detection requirements of the additional pile 6 to ensure sufficient space for the installation of the jack 5.

[0031] Preferably, the additional pile bearing capacity detection device further includes a controller, which is respectively connected to the displacement meter 10 and the jack 5. The displacement information measured by the displacement meter 10 is transmitted to the controller; the controller receives the displacement information and controls the jack 5 to perform staged loading and unloading on the additional pile 6.

[0032] Embodiment 2 This embodiment uses the additional pile bearing capacity detection device as described above to detect the bearing capacity of the additional pile during the construction of an existing building. The specific method is as follows: When performing a compressive static load test on the additional pile 6, according to the test design, oil is supplied to the jack 5. The top of the jack 5 applies an upward force to the reaction cross beam 2, and the force at the bottom of the jack 5 transmits the test load to the additional pile 6 through the lower backing plate 4; the displacement meter 10 records the displacement of the additional pile 6 under each level of load. The process of the compressive test can refer to relevant specifications and will not be elaborated here.

[0033] In the present invention, the upper backing plate 3 and the lower backing plate 4 are made of steel plates. The surfaces of both are flat and have sufficient stiffness conditions, and are not prone to obvious deformation under external forces, ensuring the deformation and stiffness requirements during the application of loads. The ground anchor 7 is a reaction force anchoring structure during the process of adding piles to existing buildings, and can provide sufficient reaction force for the fixing frame of the pile addition; when the bearing capacity of the added piles in the existing building is tested, the reaction force support with the ground anchor as the fixed point can provide sufficient reaction force for the bearing capacity test of the added pile 6, ensuring that the ultimate value of the static load bearing capacity meets the requirements. The reference piles 8 and the reference cross beam 9 are reliably supported, have sufficient stiffness, and do not displace during the static load process. The accuracy and quality of the displacement gauges 10, the jacks 5 and the controller meet the relevant test requirements for the bearing capacity test of the added pile 6, ensuring the accuracy and reliability of the test system. The reaction force cross beam 2 and the reaction force frame 1 have sufficient stiffness and are not prone to deformation, and can ensure the stiffness and deformation requirements for the bearing capacity test, ensuring the accuracy and reliability of the test data.

[0034] The present invention makes full use of the ground anchor 7 and the reaction force frame 1 system in the pile addition construction during the reinforcement and renovation of existing buildings. By using the reaction force anchoring points during the pile addition process of existing buildings, the reaction force support and the reaction force frame 1 are effectively connected through the existing ground anchoring points. The test pile and the jack 5 are tightly connected and fitted through the upper backing plate 3 and the lower backing plate 4. By reliably connecting the jack 5 and the reaction force frame 1, the jack 5 is graded for loading and unloading by the controller, so as to realize the detection of the bearing capacity of the added pile, and more efficiently utilize the existing site conditions to complete the relevant bearing capacity test work of the added pile 6.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "in the base" and the like is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, terms such as "fixed" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and can also be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The content not described in detail in this specification belongs to the prior art well-known to those of ordinary skill in the art.

[0037] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pile bearing capacity detection device, characterized in that: It includes a reaction frame, a reaction beam, a load loading mechanism and a displacement detection device; The reaction frame is arranged above the supplementary pile to be detected, and the bottoms of both sides of the reaction frame are connected to the ground; The reaction beam is arranged horizontally, and both ends are connected to the reaction frame; The upper end of the load loading mechanism is mounted on the reaction beam; the driving end of the load loading mechanism is connected to the upper end of the supplementary pile through the lower pad; The displacement detection device is fixed on the reference assembly, and the measuring end of the displacement detection device contacts the upper surface of the lower pad.

2. The pile bearing capacity detection device according to claim 1, characterized in that: The pile-supplement bearing capacity detection device is also provided with a reference component, which includes a reference pile and a reference beam; there are two groups of reference piles, which are arranged on both sides of the reaction frame, and the lower ends of the reference piles are fixed to the ground; the reference beam is horizontal, and the two ends of the reference beam are respectively connected to the two reference piles; the displacement detection equipment is fixed on the reference beam, and the displacement detection equipment is located above the lower pad, and the measuring end of the displacement detection equipment is in contact with the upper surface of the lower pad.

3. The pile-replenishing bearing capacity detection device according to claim 1 or 2, characterized in that: The load loading mechanism is a jack.

4. The pile-replenishing bearing capacity detection device according to claim 3, characterized in that: The displacement detection device is a displacement meter.

5. The pile-replenishing bearing capacity detection device according to claim 4, characterized in that: The reaction frame comprises two columns arranged on both sides of the supplementary pile, and a connecting beam connecting the tops of the two columns; the two ends of the reaction beam are respectively connected to the two columns.

6. The pile-replenishing bearing capacity detection device according to claim 5, characterized in that: A base is provided at the lower end of the column, and the base is fixed to the ground through a ground anchor.

7. The pile-replenishing bearing capacity detection device according to claim 6, characterized in that: The upper end of the jack is connected to the reaction beam through an upper pad.

8. The pile-replenishing bearing capacity detection device according to claim 7, characterized in that: The pile-replenishing bearing capacity detection device also includes a controller, which is connected to the displacement meter and the jack respectively.

9. The pile-replenishing bearing capacity detection device according to claim 7, characterized in that: The upper pad is a steel pad.

10. The pile-replenishing bearing capacity detection device according to claim 1, characterized in that: The lower pad is a steel pad.

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