CN111042221B - Foundation pile static load testing method based on flat plate load tester - Google Patents
Foundation pile static load testing method based on flat plate load tester Download PDFInfo
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- CN111042221B CN111042221B CN201911294099.XA CN201911294099A CN111042221B CN 111042221 B CN111042221 B CN 111042221B CN 201911294099 A CN201911294099 A CN 201911294099A CN 111042221 B CN111042221 B CN 111042221B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention discloses a foundation pile static load testing method based on a flat plate load tester, belonging to the field of geotechnical investigation and comprising the following steps: the method comprises the following steps: installing a hydraulic cylinder, placing a pile head on the foundation pile, and placing the hydraulic cylinder on the pile head; step two: erecting a support frame, wherein the support frame comprises a pier seat and a first support beam, the pier seat is placed on the ground on two sides of the pile head, the first support beam is erected on the pier seat, and a plurality of balancing weights are arranged above the first support beam; step three: erecting a reference beam, erecting a horizontal reference beam, and fixedly connecting two sides of the reference beam to the pier seat; step four: installing a dial indicator, installing a base of the dial indicator on the pile head, and enabling a detection end of the dial indicator head to abut against the reference beam; step five: and detecting, starting the hydraulic cylinder, enabling the upper end of the hydraulic cylinder to abut against the lower end of the first supporting beam, and recording the reading of the dial indicator under different pressures of the hydraulic cylinder. The method has the effect of improving the accuracy of the foundation pile sinking reduction test data at different pressures.
Description
Technical Field
The invention relates to the technical field of geotechnical investigation, in particular to a foundation pile static load testing method based on a flat plate load tester.
Background
The geotechnical engineering investigation refers to finding out, analyzing and evaluating geological and environmental characteristics of a construction site and geotechnical engineering conditions according to requirements of construction engineering, and compiling activities of investigation files. The flat plate load measuring instrument is a common device for geotechnical engineering investigation. The apparatus is suitable for testing foundation coefficients of coarse and fine soil and subgrade and foundation after filling and compacting, and can also be used for calculating the deformation modulus of uniform foundation soil. The flat plate load tester comprises a hydraulic cylinder and a dial indicator.
At present, a foundation pile static load testing method based on a flat plate load tester is disclosed, which comprises the following steps of firstly, placing a pile head on a foundation pile, and placing a hydraulic cylinder on the pile head; placing pier seats on two sides of the pile head, assuming a cross beam on the pier seats, and uniformly placing a plurality of balancing weights on the cross beam; thirdly, installing a dial indicator on the pile head, wherein the detection end of the gauge head of the dial indicator is abutted against the lower end face of the cross beam; and step four, starting the hydraulic cylinder to enable the upper end of the hydraulic cylinder to abut against the lower end of the cross beam, and detecting the alignment of the dial indicator under different pressures, so that the settlement of the foundation pile under different pressures is calculated.
The above prior art solutions have the following drawbacks: when the pneumatic cylinder applyed pressure to the crossbeam, when the holding power that the pneumatic cylinder was applyed to the crossbeam was greater than the holding power that the pier base was applyed to the crossbeam, the cambered surface that the crossbeam upwards arched under the effect of balancing weight to the numerical value that the amesdial measured has still included the deformation volume of crossbeam, and then detects the foundation pile settlement volume of gained and is greater than the actual settlement volume of foundation pile, leads to the problem of foundation pile settlement volume test data distortion under different pressures.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a foundation pile static load testing method based on a flat plate load tester, which can improve the accuracy of the sinking amount test data of a foundation pile under different pressures.
The above object of the present invention is achieved by the following technical solutions: a foundation pile static load testing method based on a flat plate load tester comprises the following steps: the method comprises the following steps: installing a hydraulic cylinder, placing a pile head on the foundation pile, and placing the hydraulic cylinder on the pile head; step two: erecting a support frame, wherein the support frame comprises a pier seat and a first support beam, the pier seat is placed on the ground on two sides of the pile head, the first support beam is erected on the pier seat, and a plurality of balancing weights are arranged above the first support beam; step three: erecting a reference beam, erecting a horizontal reference beam, and fixedly connecting two sides of the reference beam to the pier seat; step four: installing a dial indicator, installing a base of the dial indicator on the pile head, and enabling a detection end of the dial indicator head to abut against the reference beam; step five: and detecting, starting the hydraulic cylinder, enabling the upper end of the hydraulic cylinder to abut against the lower end of the first supporting beam, and recording the reading of the dial indicator under different pressures of the hydraulic cylinder.
Through adopting above-mentioned technical scheme, erect the benchmark roof beam alone, the sense terminal of amesdial is contradicted in the benchmark roof beam, exerts pressure to the foundation pile when the pneumatic cylinder pressurization, and the foundation pile takes place to subside, and the relative displacement volume that the pile head takes place for the position of benchmark roof beam is the settlement volume of foundation pile, compares in using the crossbeam as the reference surface for the foundation pile settlement volume that above-mentioned technical scheme detected the gained is close to the actual settlement volume of foundation pile more, has improved the foundation pile and has subsided volume test data accuracy at different pressures.
The present invention in a preferred example may be further configured to: in the first step, the upper surface of the foundation pile is cleaned before the pile head is placed on the foundation pile.
Through adopting above-mentioned technical scheme, wash the foundation pile terminal surface, avoid because there is impurity in the foundation pile terminal surface and lead to pneumatic cylinder angular deviation to avoid producing because pneumatic cylinder angular deviation and calculating the deviation.
The present invention in a preferred example may be further configured to: the support frame still includes the second supporting beam that is on a parallel with first supporting beam, the second supporting beam has two horizontal both sides that are located first supporting beam width direction respectively, second supporting beam both ends all are provided with the stabilizer blade, the vertical support of stabilizer blade is in ground.
Through adopting above-mentioned technical scheme, utilize the stabilizer blade to share the power of support frame and balancing weight, can place more balancing weights on the support frame, also make the support frame more stable.
The present invention in a preferred example may be further configured to: the support frame still includes the secondary beam, the secondary beam is perpendicular setting with first supporting beam, the both ends of secondary beam are contradicted respectively in two second supporting beam up end, the intermediate position of secondary beam is contradicted in the up end of first supporting beam, the secondary beam has a plurality ofly and be horizontal parallel arrangement, the balancing weight is placed on the secondary beam.
Through adopting above-mentioned technical scheme, utilize the secondary beam with the gravity evenly distributed of balancing weight on first supporting beam and second supporting beam, can place more balancing weights on the support frame, also make the support frame more stable.
The present invention in a preferred example may be further configured to: and the reference beam in the third step comprises two main beams fixedly connected to the pier seat and an auxiliary beam erected between the two main beams, the two main beams are respectively positioned on two sides of the hydraulic cylinder in the horizontal direction, two ends of the auxiliary beam are respectively erected on the two main beams, and the detection end of the dial indicator is abutted against the auxiliary beam.
Through adopting above-mentioned technical scheme, utilize the girder as the auxiliary girder as supporting, make that the auxiliary girder can be more stable be connected with the pier base.
The present invention in a preferred example may be further configured to: the secondary beams are two and are respectively positioned on two sides of the hydraulic cylinder in the horizontal direction, the number of the dial indicators is at least two, and the detection end of each secondary beam at least has one dial indicator to be abutted.
Through adopting above-mentioned technical scheme, make the horizontally both sides of pneumatic cylinder all be provided with the amesdial to can detect the horizontal both sides of foundation pile, detect multiunit data, increase the sampling quantity in order to reduce the error.
The present invention in a preferred example may be further configured to: the auxiliary beam and the main beam are provided with leveling devices, each leveling device comprises a sleeve and a cam which is rotatably connected to the corresponding sleeve, the sleeves are sleeved on the main beam, the cams abut against the auxiliary beam, and a first locking piece is arranged between each sleeve and each cam.
By adopting the technical scheme, the heights of the two ends of the auxiliary beam are changed by rotating the cam, so that the leveling of the auxiliary beam is realized.
The present invention in a preferred example may be further configured to: the eccentric hole that supplies the girder to wear to establish is seted up to sleeve eccentric, the axle center motion trail in eccentric hole is the orbit circle when the sleeve rotates, the cam outline is for using the orbit circle as the involute of base circle.
By adopting the technical scheme, the auxiliary beam is abutted against the outer contour of the cam, the outer contour of the cam is an involute, so that the force of the auxiliary beam is tangent to the track circle, and when the sleeve is rotated, the force of the auxiliary beam passes through the eccentric hole, so that the force of the auxiliary beam cannot form moment, and the rotation of the cam is avoided.
The present invention in a preferred example may be further configured to: the cam is marked with a plurality of first marking lines, the first marking lines are perpendicular to the involute profile of the cam, the extension lines of the first marking lines are tangent to the track circle, the sleeve is marked with a plurality of second marking lines, and the extension lines of the second marking lines penetrate through the circle center of the eccentric hole.
By adopting the technical scheme, when the auxiliary beam is abutted against one of the first marking lines, the auxiliary beam and the first marking line are perpendicular to each other, and the sleeve is rotated to align the second marking line with the first marking line, so that the force of the auxiliary beam penetrates through the eccentric hole.
The present invention in a preferred example may be further configured to: the first locking piece is the annular that asbestos friction material made, the coaxial cover of first locking piece is established as to the sleeve, the outer wall and the cam laminating of first locking piece.
Through adopting above-mentioned technical scheme, utilize the stay to restrict the relative rotation of sleeve and cam, place it and take place to rotate and influence the testing result at detection process sleeve and cam.
In summary, the invention includes at least one of the following beneficial technical effects:
firstly, a reference beam is independently erected, the detection end of the dial indicator is abutted against the reference beam, and when the foundation pile is settled, the relative displacement of the foundation pile relative to the reference beam is the settlement of the foundation pile, so that the detected settlement of the foundation pile is closer to the actual settlement of the foundation pile, and the accuracy of the data of the settlement test of the foundation pile at different pressures is improved;
the support frame comprises a first support beam and a second support beam, wherein two ends of the first support beam are abutted to the pier seat respectively, the second support beam is parallel to the first support beam, support legs are arranged at two ends of the second support beam, the support legs are vertically supported on the ground, a plurality of secondary beams are erected on the first support beam and the second support beam, the balancing weight is placed on the secondary beams, the secondary beams are used for uniformly distributing the gravity of the balancing weight on the first support beam and the second support beam, more balancing weights can be placed on the support frame, and the support frame is more stable;
and thirdly, leveling devices are arranged on the auxiliary beam and the main beam, and the leveling devices are utilized to change the heights of the two ends of the auxiliary beam, so that the auxiliary beam is leveled.
Drawings
FIG. 1 is a perspective view of the present embodiment;
FIG. 2 is a perspective view of the present embodiment showing a reference beam;
fig. 3 is a schematic structural view for showing a leveling device in the present embodiment.
Reference numerals: 100. foundation piles; 101. pile head; 102. a hydraulic cylinder; 103. a support frame; 104. pier seats; 105. a first support beam; 106. a second support beam; 107. a support leg; 108. a secondary beam; 109. a balancing weight; 200. a reference beam; 201. a main beam; 202. a secondary beam; 203. a dial indicator; 300. a leveling device; 301. a sleeve; 302. a cam; 303. an eccentric hole; 304. accommodating grooves; 305. a first locking tab; 306. a second locking tab; 307. a first marking line; 308. a second marking line.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): as shown in fig. 1, the method for testing the static load of a foundation pile based on a slab load tester disclosed by the invention comprises the following steps:
the method comprises the following steps: the hydraulic cylinder 102 is installed, and as shown in fig. 2, the upper end surface of the foundation pile 100 is cleaned to remove foreign matter on the upper end surface of the foundation pile 100. Then the pile head 101 is placed on the foundation pile 100, the pile head 101 having a disc shape and being located at the middle position of the foundation pile 100. The hydraulic cylinder 102 is placed on the pile head 101, the cylinder body of the hydraulic cylinder 102 is placed on the upper end face of the pile head 101, and the piston rod of the hydraulic cylinder 102 faces upward. The hydraulic cylinder 102 is vertically arranged and coaxially arranged with the pile head 101.
Step two: the supporting frame 103 is erected, as shown in fig. 1, the supporting frame 103 includes a pier seat 104 and a first supporting beam 105, two pier seats 104 are respectively placed on two sides of the pile head 101, and the first supporting beam 105 is erected on the pier seat 104. The support frame 103 further comprises a second support beam 106 parallel to the first support beam 105, and the second support beam 106 has two horizontal sides respectively located at the width direction of the first support beam 105. Both ends of the second support beam 106 are fixedly connected with support legs 107, and the support legs 107 are vertically supported on the ground. The upper end surfaces of the first supporting beam 105 and the second supporting beam 106 are located at the same horizontal plane, and a horizontal secondary beam 108 is erected on the first supporting beam 105. The secondary beam 108 is perpendicular to the first support beam 105, two ends of the secondary beam 108 respectively abut against the upper end surfaces of the two second support beams 106, and the middle position of the secondary beam 108 abuts against the upper end surface of the first support beam 105. The secondary beam 108 is plural and arranged horizontally in parallel. A plurality of weights 109 are placed on the secondary beam 108.
Step three: a reference beam 200 is erected, and as shown in fig. 2, the reference beam 200 includes a main beam 201 and a sub beam 202. Two ends of the main beam 201 are respectively fixedly connected to the pier seats 104 through expansion screws. The main beams 201 are two and are respectively positioned at two sides of the hydraulic cylinder 102 in the horizontal direction. Two ends of the secondary beam 202 are respectively erected on the two main beams 201 through the leveling devices 300, and the leveling devices 300 are used for adjusting the heights of the two ends of the secondary beam 202 so that the secondary beam 202 is horizontal. The secondary beams 202 are two and located on both sides of the hydraulic cylinder 102 in the horizontal direction, respectively.
Step four: the dial gauge 203 is mounted, as shown in fig. 2, the base of the dial gauge 203 is mounted on the pile head 101 by bolts, and the detection end of the head of the dial gauge 203 abuts against the upper end surface of the secondary beam 202. Four dial indicators 203 are provided, and the detection ends of two dial indicators 203 on each secondary beam 202 are butted. The dial indicators 203 are arranged on the two horizontal sides of the hydraulic cylinder 102, so that the two horizontal sides of the foundation pile 100 can be detected, multiple groups of data are detected, and the sampling number is increased to reduce errors.
Step five: it is detected, as shown in fig. 2, that the hydraulic cylinder 102 is in communication with a hydraulic source, which includes a hydraulic pump and a hydraulic oil tank. The hydraulic pump pressurizes and conveys hydraulic oil in the hydraulic oil tank to the hydraulic cylinder 102, so that the hydraulic cylinder 102 is expanded, and a piston rod of the hydraulic cylinder 102 abuts against the bottom of the first support beam 105. The hydraulic cylinder 102 is provided with a hydraulic sensor for detecting the pressure in the cylinder. The hydraulic cylinder 102 is continuously pressurized by the hydraulic pump, and readings of the dial gauge 203 are recorded at different pressures of the hydraulic cylinder 102. The amount of change in the reading of the dial gauge 203 is the amount of settlement of the foundation pile 100.
As shown in fig. 3, the leveling device 300 includes a sleeve 301 sleeved on the main beam 201 and a cam 302 rotatably connected to the sleeve 301. The sleeve 301 is provided with an eccentric hole 303 for the main beam 201 to penetrate through, the profile of the cam 302 is abutted to the auxiliary beam 202, and the heights of two ends of the auxiliary beam 202 are changed by rotating the cam 302, so that the leveling of the auxiliary beam 202 is realized. The outer wall of the cam 302 defines receiving slots 304, the receiving slots 304 being positioned end-to-end adjacent to each other for receiving the secondary beams 202.
As shown in fig. 3, in order to avoid a deviation of the detection result due to the relative rotation of the cam 302 and the sleeve 301 during the detection, a first locking piece 305 is provided between the sleeve 301 and the cam 302. The first locking piece 305 is in a ring shape made of asbestos friction materials, the first locking piece 305 is coaxially sleeved on the sleeve 301, the outer wall of the first locking piece 305 is attached to the cam 302, the first locking piece 305 has a high friction coefficient, so that the relative rotation of the sleeve 301 and the cam 302 is limited by friction, and the sleeve 301 and the cam 302 are prevented from rotating in the detection process to influence the detection result.
As shown in fig. 3, in order to avoid relative rotation between the sleeve 301 and the main beam 201 during detection, an annular second locking piece 306 is coaxially arranged in the eccentric hole 303, and the second locking piece 306 is annular made of asbestos friction material. Therefore, the relative rotation of the sleeve 301 and the main beam 201 is limited by using friction force, and the sleeve 301 and the cam 302 are prevented from rotating to influence the detection result in the detection process.
As shown in fig. 3, the eccentric hole 303 is eccentrically provided in the sleeve 301, and the axis movement locus of the eccentric hole 303 is a locus circle when the sleeve 301 rotates. The outer contour of the cam 302 is an involute curve to a base circle of the locus circle. The auxiliary beam 202 is abutted against the outer contour of the cam 302, the outer contour of the cam 302 is an involute, so that the force of the auxiliary beam 202 is tangent to the locus circle, and when the sleeve 301 is rotated, the force of the auxiliary beam 202 to the cam 302 passes through the eccentric hole 303, so that the force of the auxiliary beam 202 to the cam 302 cannot form a moment, and the rotation of the cam 302 is avoided.
As shown in fig. 3, the cam 302 is marked with a plurality of first marking lines 307. The first mark line 307 is perpendicular to the involute profile of the cam 302, and the extension of the first mark line 307 is tangent to the locus circle. The sleeve 301 is marked with a plurality of second marking lines 308, and extension lines of the second marking lines 308 pass through the center of the eccentric hole 303. When the secondary beam 202 interferes with one of the first marked lines 307, the two are perpendicular, and the sleeve 301 is rotated to align the second marked line 308 with the first marked line 307, so that the force of the secondary beam 202 passes through the eccentric hole 303.
The specific working principle of this embodiment is as follows: the reference beam 200 is erected independently, the detection end of the dial indicator 203 is abutted to the reference beam 200, the relative displacement of the foundation pile 100 relative to the reference beam 200, namely the settlement of the foundation pile 100, is compared with the settlement of the foundation pile 100 which is obtained by detection with a cross beam as a reference surface in the background technology, so that the detected settlement of the foundation pile 100 is closer to the actual settlement of the foundation pile 100, and the accuracy of the settlement test data of the foundation pile 100 under different pressures is improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (3)
1. A foundation pile static load testing method based on a flat plate load tester is characterized in that: the method comprises the following steps: the method comprises the following steps: installing a hydraulic cylinder (102), placing a pile head (101) on the foundation pile (100), and placing the hydraulic cylinder (102) on the pile head (101); step two: erecting a support frame (103), wherein the support frame (103) comprises a pier seat (104) and a first support beam (105), the pier seat (104) is placed on the ground on two sides of the pile head (101), the first support beam (105) is erected on the pier seat (104), and a plurality of balancing weights (109) are arranged above the first support beam (105); step three: erecting a reference beam (200), erecting a horizontal reference beam (200), and fixedly connecting two sides of the reference beam (200) to the pier base (104); step four: installing a dial indicator (203), installing a base of the dial indicator (203) on the pile head (101), and enabling a detection end of the head of the dial indicator (203) to abut against the reference beam (200); step five: detecting, starting the hydraulic cylinder (102), enabling the upper end of the hydraulic cylinder (102) to abut against the lower end of the first supporting beam (105), and recording the reading of the dial indicator (203) under different pressures of the hydraulic cylinder (102); in the first step, the upper surface of the foundation pile (100) is cleaned before the pile head (101) is placed on the foundation pile (100); the supporting frame (103) further comprises a second supporting beam (106) parallel to the first supporting beam (105), the second supporting beam (106) is provided with two horizontal sides which are respectively located on the width direction of the first supporting beam (105), supporting feet (107) are arranged at two ends of the second supporting beam (106), and the supporting feet (107) are vertically supported on the ground; the supporting frame (103) further comprises a secondary beam (108), the secondary beam (108) is perpendicular to the first supporting beam (105), two ends of the secondary beam (108) are respectively abutted to the upper end faces of the two second supporting beams (106), the middle position of the secondary beam (108) is abutted to the upper end face of the first supporting beam (105), the secondary beams (108) are arranged in parallel horizontally, and the balancing weight (109) is placed on the secondary beam (108); in the third step, the reference beam (200) comprises two main beams (201) fixedly connected to the pier seat (104) and an auxiliary beam (202) erected between the two main beams (201), the two main beams (201) are respectively positioned at two sides of the hydraulic cylinder (102) in the horizontal direction, two ends of the auxiliary beam (202) are respectively erected on the two main beams (201), and the detection end of the dial indicator (203) is abutted against the auxiliary beam (202); the two auxiliary beams (202) are respectively positioned on two sides of the hydraulic cylinder (102) in the horizontal direction, at least two dial indicators (203) are arranged, and the detection end of at least one dial indicator (203) of each auxiliary beam (202) is abutted; the auxiliary beam (202) and the main beam (201) are provided with leveling devices (300), each leveling device (300) comprises a sleeve (301) and a cam (302) which is rotatably connected to the corresponding sleeve (301), the main beam (201) is sleeved with the corresponding sleeve (301), the cam (302) abuts against the auxiliary beam (202), and a first locking piece (305) is arranged between each sleeve (301) and the corresponding cam (302); eccentric hole (303) that confession girder (201) were worn to establish are offered to sleeve (301) eccentricity, the axle center motion trail of eccentric hole (303) is the orbit circle when sleeve (301) rotate, cam (302) outline is for using the orbit circle to be the involute of base circle.
2. The foundation pile static load testing method based on the plate load tester as claimed in claim 1, wherein: the cam (302) is marked with a plurality of first marking lines (307), the first marking lines (307) are perpendicular to an involute profile of the cam (302), an extension line of the first marking lines (307) is tangent to a track circle, the sleeve (301) is marked with a plurality of second marking lines (308), and an extension line of the second marking lines (308) penetrates through the circle center of the eccentric hole (303).
3. The foundation pile static load testing method based on the plate load tester as claimed in claim 2, wherein: first locking plate (305) are the annular that asbestos friction material made, sleeve (301) are established to coaxial cover of first locking plate (305), the outer wall and the cam (302) laminating of first locking plate (305).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911294099.XA CN111042221B (en) | 2019-12-16 | 2019-12-16 | Foundation pile static load testing method based on flat plate load tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911294099.XA CN111042221B (en) | 2019-12-16 | 2019-12-16 | Foundation pile static load testing method based on flat plate load tester |
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| CN111042221A CN111042221A (en) | 2020-04-21 |
| CN111042221B true CN111042221B (en) | 2021-07-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2284673A (en) * | 1993-12-08 | 1995-06-14 | Precision Monitoring & Control | Testing,in situ,the static load-bearing capacity of a pile |
| CN102277884A (en) * | 2011-05-17 | 2011-12-14 | 浙江大学城市学院 | Device for treating pile head for vertical static load test and construction method thereof |
| CN205421365U (en) * | 2016-03-21 | 2016-08-03 | 浙江大学城市学院 | Composite foundation loading test device |
| CN107313353A (en) * | 2017-08-16 | 2017-11-03 | 贵州省交通规划勘察设计研究院股份有限公司 | A kind of device and method for accurate adjustment precast beam bottom pre-embedded steel slab longitudinal slope |
| CN208748712U (en) * | 2018-07-16 | 2019-04-16 | 河北恒基建设工程质量检测有限公司 | A kind of test pile vertical compression detection device |
-
2019
- 2019-12-16 CN CN201911294099.XA patent/CN111042221B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2284673A (en) * | 1993-12-08 | 1995-06-14 | Precision Monitoring & Control | Testing,in situ,the static load-bearing capacity of a pile |
| CN102277884A (en) * | 2011-05-17 | 2011-12-14 | 浙江大学城市学院 | Device for treating pile head for vertical static load test and construction method thereof |
| CN205421365U (en) * | 2016-03-21 | 2016-08-03 | 浙江大学城市学院 | Composite foundation loading test device |
| CN107313353A (en) * | 2017-08-16 | 2017-11-03 | 贵州省交通规划勘察设计研究院股份有限公司 | A kind of device and method for accurate adjustment precast beam bottom pre-embedded steel slab longitudinal slope |
| CN208748712U (en) * | 2018-07-16 | 2019-04-16 | 河北恒基建设工程质量检测有限公司 | A kind of test pile vertical compression detection device |
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