Bearing experiment device for compaction impact-expansion pile
By designing a load bearing experimental device for tight punching piles, using jacks and blocking components to apply reverse pressure to tight punching piles, and monitoring pressure data in real time, the problem of insufficient detection accuracy in the prior art is solved, and high-precision load-bearing capacity detection is achieved.
Patent Information
- Application Number
- CN202421812688.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In the prior art, after the construction of the extruded and dense punching pile expansion piles is completed, the accuracy of the bearing capacity detection of the composite foundation after the foundation is processed is limited, which is difficult to meet the design requirements.
A test device for load bearing of dense piles is designed, and the jack and block assembly is used to apply reverse pressure to the dense piles. The pressure data is monitored and feedbacked in real time through a pressure gauge to directly measure the load bearing capacity of the dense piles.
It realizes high-precision and intuitive detection of the load-bearing capacity of the compressed and expanded piles, ensuring that it meets the design requirements, and improving the accuracy and reliability of the inspection.
Smart Images
Figure CN223176798U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of building construction, in particular to a bearing test device for compacted and expanded piles. Background Technique
[0002] The compacted and expanded pile forms a pile hole in the foundation soil. Through the forced lateral extrusion of the original soil mass at the pile hole position, the density of the soil mass between adjacent pile holes is increased. After the hole is formed, plain soil or other suitable materials are filled into the pile hole, and then tamped layer by layer to form a dense and high-strength pile body. At the same time, the soil on the hole wall is further compacted by the radial expansion of the tamping material, and the soil between the piles and the soil of the pile body are tightly cemented together, so as to ensure that the composite foundation can bear the load and the displacements of the pile and the soil can develop coordinately.
[0003] The compacted and expanded pile is mainly applicable to treating foundations with poor geological conditions such as collapsible loess, plain fill, and miscellaneous fill. Through compaction and tamping treatment, the density and bearing capacity of the foundation soil can be significantly improved, the foundation settlement and deformation can be reduced, thereby improving the safety and stability of the project;
[0004] After the construction of the compacted and expanded pile is completed, the bearing capacity of the composite foundation after foundation treatment needs to meet the design requirements. At present, it is mainly to detect the density of the compacted and expanded pile, and then calculate its bearing capacity. The accuracy of this method is limited and needs to be improved. Content of the Utility Model
[0005] In order to solve the above problems, the utility model provides a bearing test device for compacted and expanded piles.
[0006] The technical solution of the utility model is: a bearing test device for compacted and expanded piles, including compacted and expanded piles uniformly arranged in the foundation. On the surface of the foundation around the compacted and expanded piles, two load-bearing seats are placed side by side with a certain distance between them. A number of support members are placed at equal intervals between the upper end faces of the two load-bearing seats. A pressing block assembly is placed between the upper end faces of the support members. The pressing block assembly evenly applies pressure between each support member. A jack is placed on the upper end face of a compacted and expanded pile in the middle between the two load-bearing seats. The upper end of the piston rod of the jack supports on the bottom surface of the middle support member. A larger-sized backing plate can be set at the upper end of the piston rod. A branch pipe is provided on the channel between the check valve of the jack and the jack. A pressure gauge is installed in the branch pipe. After the jack applies pressure, a load will be applied to the upper end of the compacted and expanded pile.
[0007] Preferably, a support base is provided between the jack and the upper end face of the compacted and expanded pile. The center of the support base coincides with the center of the upper end face of the compacted and expanded pile. A number of reinforcing plates are evenly distributed between the seat plate and the base body of the support base.
[0008] Preferably, the support member is a section steel, which includes a lower support plate, an upper support plate and two side plates. The upper support plate and the lower support plate have the same size. The two side plates are connected between the lower support plate and the upper support plate to form an I-shaped structure, and there is a certain distance between the lower support plate and the upper support plate.
[0009] Preferably, the pressing block assembly includes several groups of pressing blocks arranged side by side. The pressing block is a square cement column, and the length of the square cement column is greater than the distance between the two bearing seats. The square cement columns in the upper and lower groups are vertically staggered, and the bearing seats are also set as square cement columns.
[0010] Preferably, several longitudinal bars are uniformly arranged inside the square cement column, and circular stirrups are sleeved between the longitudinal bars. Before pouring, the sliding stirrups and the longitudinal bars are tied with thin iron wires.
[0011] Preferably, a steel column is arranged longitudinally in the middle of the square cement column. The steel column is a deformed bar, and both ends of the steel column extend out of the end face of the square cement column.
[0012] Preferably, a limiting head is arranged on the outer end face of the extending part of the steel column, and the diameter of the limiting head is greater than the diameter of the steel column.
[0013] Preferably, the bearing seat is placed on the upper end face of the compacted and expanded pile.
[0014] The beneficial technical effect of the utility model is that the device applies a reverse pressure to the compacted and expanded pile in the foundation by jacking the pressing block assembly with a jack. As the pressure is continuously applied, the bearing capacity of the compacted and expanded pile is tested. The pressure data is fed back through the pressure gauge connected to the jack. The device can accurately and directly test and obtain the bearing capacity of the compacted and expanded pile, ensuring that the compacted and expanded pile meets the design requirements. Description of the Drawings
[0015] Figure 1 is the three-dimensional structure schematic diagram of the device;
[0016] Figure 2 is the front view structure schematic diagram of the device;
[0017] Figure 3 is Figure 2 the A-A cross-sectional structure schematic diagram of
[0018] Figure 4 is the three-dimensional structure schematic diagram of another structural schematic diagram of the square cement column;
[0019] Figure 5 is Figure 4 the B-B cross-sectional structure schematic diagram of
[0020] Figure 6 is the installation structure schematic diagram of the pressure gauge on the jack;
[0021] Figure 7 This is the on-site use diagram of the device.
[0022] In the figure, 11. Foundation, 12. Compaction and expansion pile, 13. Bearing seat, 14. Pressing block assembly, 141. Pressing block body, 142. Longitudinal reinforcement, 143. Ring stirrup, 144. Steel column, 145. Limiting head, 15. Jack, 151. Support base, 152. Seat plate, 153. Reinforcing plate, 154. Branch pipe, 155. Check valve, 156. Pressure gauge, 16. Support member. Specific implementation mode
[0023] Example 1, referring to the attached drawings of the specification Figures 1-3 As shown in FIGS. 5 and 6, a compaction and expansion pile bearing test device includes compaction and expansion piles 12 uniformly arranged in the foundation 11. Two bearing seats 13 are placed side by side on the surface of the foundation around the compaction and expansion piles. A plurality of support members 16 are placed at equal intervals between the upper end faces of the two bearing bases. A pressing block assembly 14 is placed between the upper end faces of the support members. The pressing block assembly needs to have a large self-weight. A jack 15 is placed on the upper end face of a compaction and expansion pile 12 in the middle of the two bearing seats 13. After the jack pushes the pressing block assembly 14, a reverse pressure will be generated on the compaction and expansion pile 12. The upper end of the piston rod of the jack 15 supports on the bottom surface of the middle support member 16. A branch pipe 154 is provided on the channel between the check valve 155 of the jack 15 and the jack. A pressure gauge 156 is installed in the branch pipe. After the jack 15 is pressurized, the check valve 155 cuts off the return of the hydraulic oil to the hydraulic station. At this time, the pressure received by the jack 15 is transmitted to the pressure gauge 156 at the branch pipe 154 through the piston rod and the hydraulic oil. The pressure value received by the jack 15 can be read through the pressure gauge.
[0024] A support base 151 is provided between the jack 15 and the upper end face of the compaction and expansion pile 12. A plurality of reinforcing plates 153 are evenly distributed between the seat plate 152 of the support base 151 and the base body. The contact area between the jack and the compaction and expansion pile 12 is increased through the support base 151, and the stability of the reverse pressurization of the jack 15 is improved.
[0025] The support member 16 is a section steel, which includes a lower support plate, an upper support plate and two side plates. The two side plates are connected between the lower support plate and the upper support plate to form an I-shaped structure. The support member 16 with this I-shaped structure has high support strength and anti-deformation ability, and can provide stable support for the pressing block assembly 14 with a large self-weight.
[0026] The bearing seat 13 is placed on the upper end face of the compaction and expansion pile 12. There is an uneven phenomenon on the surface of the foundation 11, and the heights of the compaction and expansion piles 12 are the same. This placement method can improve the levelness of the placement of the bearing seat 13.
[0027] When the device is in use, place the support base 151 on the upper surface of a compaction and expansion pile 12 inside the foundation, adjust the two to be centered, place a jack 15 at the center of the support base 151, then symmetrically place load-bearing seats 13 on both sides of the jack, place support members 16 at equal intervals between the load-bearing seats, and place a pressing block assembly 14 between the support members. Then start the hydraulic station to start the jack 15 to push upward against the bottom surface of the support member 16. The upper pressing block assembly 14 applies a reverse pressure to the compaction and expansion pile 12 through the jack 15. Continuously pressurize the jack 15. After the jack is pressurized, the check valve 155 inside it cuts off the return flow of hydraulic oil to the hydraulic station. At this time, the pressure received by the jack will be transmitted to the pressure gauge 156 at the branch pipe 154 through the piston rod and hydraulic oil. Read the pressure value received by the jack 15 through the pressure gauge 156, and then obtain the bearing capacity of the compaction and expansion pile 12, realizing the bearing capacity test of the compaction and expansion pile 12.
[0028] Example 2, see the attached instruction Figures 4-5 , this example is basically the same as Example 1, and the same parts will not be repeated. The difference is that the pressing block assembly 14 includes several groups of pressing blocks 141 arranged side by side. The pressing blocks are square cement columns, and the upper and lower groups of square cement columns are staggered. According to the design requirements of the compaction and expansion pile 12, select the number and layers of stacked pressing blocks so that it can meet the experimental requirements. The load-bearing seat 13 is also set as a square cement column. The cement column is cheap and not easy to rust, and can be reused.
[0029] A number of longitudinal bars 142 are evenly arranged inside the square cement column, and a circular stirrup 143 is sleeved between the longitudinal bars 142. The structural strength of the square cement column is increased through the internal steel bar system, making it not easy to break and improving the service life.
[0030] A steel column 144 is provided longitudinally in the middle of the square cement column. Both ends of the steel column 1 extend out of the end face of the square cement column. A limit head 145 is provided on the outer end face of the extended part of the steel column 144. The two ends of the steel column 144 and the limit head 145 form a hanging ear structure. This hanging ear structure does not affect the stacking of square cement columns up and down, facilitates the hanging connection between the suspension equipment and the cement column, and improves the convenience of installing or removing the square cement column.
Claims
1. A bearing test device for compaction punching and expanding piles, characterized in that: It includes compaction and expansion piles evenly arranged in the foundation. Two bearing seats are placed side by side on the foundation surface around the compaction and expansion piles. A number of support members are placed at equal intervals between the upper end faces of the two bearing bases. A pressing block assembly is placed between the upper end faces of the support members. A jack is placed on the upper end face of a compaction and expansion pile right in the middle between the two bearing seats. The upper end of the piston rod of the jack supports on the bottom surface of the middle support member. A branch pipe is provided on the channel between the check valve of the jack and the jack, and a pressure gauge is installed in the branch pipe.
2. The bearing test device of the compaction and punching-expanded pile according to claim 1, wherein: A support base is provided between the jack and the upper end face of the compaction and expansion pile. A number of reinforcing plates are evenly distributed between the seat plate and the base body of the support base.
3. The bearing test device for compaction and punching-expanded piles according to claim 1, wherein: The support member is a section steel, which includes a lower support plate, an upper support plate and two side plates. The two side plates are connected between the lower support plate and the upper support plate to form an I-shaped structure.
4. A compaction and punching-expanded pile bearing test device according to claim 1, characterized in that: The pressing block assembly includes a number of groups of pressing block bodies arranged side by side. The pressing block body is a square cement column. The square cement columns of the upper and lower groups are arranged staggeredly. The bearing seat is also set as a square cement column.
5. The bearing test device of the compaction punching-expanded pile according to claim 4, characterized in that: A number of longitudinal bars are evenly arranged inside the square cement column, and circular stirrups are sleeved between the longitudinal bars.
6. The compaction and punching-expanded pile bearing test device according to claim 5, characterized in that: A steel column is provided longitudinally in the middle of the square cement column, and both ends of the steel column extend out of the end face of the square cement column.
7. A compaction and punching-expanded pile bearing test device according to claim 6, characterized in that: A limit head is provided on the outer end face of the extending part of the steel column.
8. The compaction and punching-expanded pile bearing test device according to claim 1, characterized in that: The bearing seat is placed on the upper end face of the compaction and expansion pile.