CN110397095B - Pile foundation bearing capacity detection system and method - Google Patents
Pile foundation bearing capacity detection system and method Download PDFInfo
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- CN110397095B CN110397095B CN201910722078.7A CN201910722078A CN110397095B CN 110397095 B CN110397095 B CN 110397095B CN 201910722078 A CN201910722078 A CN 201910722078A CN 110397095 B CN110397095 B CN 110397095B
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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
Abstract
The invention relates to a pile foundation bearing capacity detection system which comprises a fixed sleeve, an inner bushing, a cover plate, support columns, an upper support frame and hoisting mechanisms, wherein the fixed sleeve and the inner bushing are of hollow cylindrical structures, the inner bushing is sequentially sleeved in the hollow structure of the fixed sleeve, the cover plate is installed on the top of the fixed sleeve, the upper support frame is installed on the top of the cover plate through the support columns, the hoisting mechanisms are installed on the left side and the right side of the lower end of the fixed sleeve, and the fixed sleeve and the inner bushings in different numbers are matched to form different inner diameter sizes. The invention can solve the problems that the inner diameter of the load bearing bracket of the pile foundation is adjusted complicatedly when the existing method is used for detecting different pile foundations, the bearing bracket cannot be attached to the pile foundation when being sleeved on the top of the pile foundation, the potential danger of side turning of the bearing bracket is caused, the phenomenon of uneven stress of the pile foundation can exist when the load is manually placed on the bearing bracket, and the detection effect of the pile foundation is influenced.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a pile foundation bearing capacity detection system and method.
Background
A deep foundation consisting of piles and pile caps connected with the pile tops or a single-pile foundation connected with piles by columns is called a pile foundation for short; in modern high-rise buildings, pile foundations are widely applied, the high-rise building pile foundations are generally low-bearing-platform pile foundations, pile bodies of the low-bearing-platform pile foundations are all buried in the soil, and the bottom surfaces of the bearing platforms are in contact with the soil body.
Need detect its bearing capacity after the pile foundation construction finishes, the bearing capacity of current pile foundation detects generally to go on through the detection method of static load, hoists the heavy object in the upper end of pile foundation after certain time, detects the pile foundation and whether takes place deformation, registers testing result through the mode of artifical record, and the problem that exists when current mode to the pile foundation adoption static load detects as follows:
1. when a load is manually applied to the pile foundation, a bearing bracket needs to be placed at the upper end of the pile foundation, when load force detection is carried out on the pile foundations of different models, the size adjusting step of the bearing bracket is complicated, and the bearing bracket cannot be attached to the pile foundation when being sleeved at the top of the pile foundation, so that the bearing bracket has the potential danger of side turning;
2. when the load is placed on the bearing bracket manually, the stress of the pile foundation can generate uneven phenomenon, thereby influencing the detection effect of the pile foundation.
Disclosure of Invention
In order to solve the problems, the invention provides a pile foundation bearing capacity detection system which comprises a fixed sleeve, an inner bushing, a cover plate, support columns, an upper support frame and a hoisting mechanism, wherein the fixed sleeve and the inner bushing are both of hollow cylindrical structures, the inner bushing is sequentially sleeved in the hollow structure of the fixed sleeve, the cover plate is installed on the top of the fixed sleeve, the upper support frame is installed on the top of the cover plate through the support columns, the hoisting mechanism is installed on the left side and the right side of the lower end of the fixed sleeve, and the fixed sleeve is matched with different numbers of inner bushings to form different inner diameter sizes.
The middle inner side surface of the fixed sleeve and the middle inner side surface of the inner bushing are respectively provided with two clamping and pressing mechanisms, an included angle between the two clamping and pressing mechanisms is one hundred eighty degrees, the size of the clamping and pressing mechanism on the fixed sleeve is larger than that of the clamping and pressing mechanism on the inner bushing, and the size of the clamping and pressing mechanism on the inner bushing is sequentially reduced from outside to inside.
The clamping and pressing mechanism comprises a screwing groove and a limiting clamping plate, the screwing groove is formed in the inner side face of the middle part of the fixed sleeve and the inner lining, the screwing groove is of an arc-shaped structure, and the limiting clamping plate of the arc-shaped structure is arranged on the upper inner wall and the lower inner wall of the right end of the screwing groove.
The outer side surface of each inner bushing is provided with a locking mechanism, and the locking mechanism is matched with a clamping and pressing mechanism arranged on the outer side of the locking mechanism; locking mechanical system include locking hole, the locking body and reset spring, the locking hole sets up on the lateral surface of inner liner, the locking body passes through reset spring and installs on the inside wall in locking hole, the middle part of the locking body is located between two spacing cardboard, specific during operation, locking mechanical system can cooperate with card pressure mechanism for the inner liner of outermost end can lock on the medial surface of fixed cover, the inner liner of inner can lock on the inner liner adjacent rather than the outer end.
Hoisting machine construct including hoist cable, hanger plate, connector link and hanging frame, the hoist cable is around the symmetry install on the outside bottom of fixed cover, all installs a hanger plate on the lower extreme of every hoist cable, two connector links are all installed to the lower extreme of every hanger plate, connector link symmetric distribution is both ends about the hoist cable, the hanging frame is installed on the lower extreme of connector link, specific during operation, through the load of placing suitable weight at the hanging frame, can make the pile foundation be in suitable pull-down power.
As a preferred technical solution of the present invention, the left end of the screwing groove is of a trapezoidal structure, and the right end of the trapezoidal structure of the screwing groove corresponds to the left end of the limiting clamping plate, so that when the locking body performs a rotational locking action in the screwing groove, the locking body can slide to the right end of the trapezoidal structure of the screwing groove along the left end of the trapezoidal structure of the screwing groove, and under the guiding action of the right end of the trapezoidal structure of the screwing groove, the middle part of the locking body can slide between the two limiting clamping plates.
As a preferred technical scheme, the locking body is of an I-shaped structure, the middle of the locking body is clamped between two limiting clamping plates, the side faces, close to the limiting clamping plates, of the I-shaped structure of the locking body are arc-shaped faces, the side face, far away from the reset spring, of the locking body is provided with an arc-shaped rubber pad, the rear side face of the rear end of the locking body is provided with an arc-shaped rubber pad, the middle of the I-shaped structure of the locking body can be clamped between the two limiting clamping plates in a sliding fit mode, the arc-shaped faces of the front end and the rear end of the locking body can be attached to the side faces of the limiting clamping plates, when the locking body moves to the right end of the screwing groove, the rubber pad at the rear end of the locking body can be.
According to a preferred technical scheme, the inner side surfaces of the bottom ends of the fixed sleeve and the inner bushing are respectively provided with an arc chute, the inner side surfaces of the lower ends of the fixed sleeve and the inner bushing are respectively and symmetrically provided with a limiting clamping block in a bolt connection mode, the limiting clamping blocks are positioned above the arc chutes, the outer side surface of each inner bushing is provided with a clamping groove matched with the clamping block, the arc chutes at the bottom ends of the fixed sleeve and the inner bushing can prevent a locking body from being incapable of automatically moving into the inner side surfaces of the fixed sleeve or the inner bushing, and the limiting clamping blocks can limit the inner bushing when the inner bushing is installed, so that the locking mechanism can move to the left end of the clamping and pressing mechanism to facilitate installation of the inner bushing, and the inner bushing can support the inner bushing after being screwed and installed.
As a preferred technical scheme of the invention, the left end and the right end of the fixed sleeve and the inner bushing are respectively provided with a round hole corresponding to each other, the inner end of each round hole in the inner bushing is provided with a hexagonal groove, the left end and the right end of the fixed sleeve and the inner bushing are connected through bolts, the integrity of the pile foundation.
As a preferable technical scheme of the invention, the support columns are symmetrically arranged on the upper end surface of the middle part of the cover plate, the upper ends of the support columns are obliquely arranged outwards, and the upper ends of the support columns are obliquely arranged outwards, so that the weight of the load in the upper support frame can be uniformly applied to the cover plate, and the uniformity of the pressure applied to the pile foundation by the invention is increased.
As a preferable technical scheme of the invention, the lifting frame is positioned at the inner side of the lower end of the lifting cable, the lifting frame is detachably connected with the connecting buckle, and the lifting frame is positioned at the lower end of the lifting cable to enable the lifting cable to be obliquely arranged, so that the lower tension force which can be uniformly applied to the pile foundation can be increased, and the lifting frame can be replaced into a proper size according to actual needs.
In addition, the invention provides a detection method of a pile foundation bearing capacity detection system, which comprises the following detection steps:
the first step is as follows: preparation before measurement: installing a proper number of inner bushings in the fixed sleeve according to the overall dimension of the pile foundation;
the second step is that: inserting an inner bushing: inserting a clamping groove on the inner bushing along the position of the limiting clamping block of the fixed sleeve, wherein the locking mechanism can automatically contract under the action of the arc chute on the fixed sleeve, and the locking mechanism of the inner bushing corresponds to the clamping and pressing mechanism in height when the upper end of the inner bushing is propped against the lower side surface of the cover plate;
the third step: screwing the inner bushing: the inner bushing is manually rotated, the locking body can slide along the left end of the screwing groove trapezoidal structure, the middle part of the locking body can slide between the two limiting clamping plates under the guiding action of the right end of the screwing groove trapezoidal structure, the rubber pad at the rear end of the locking body can be locked on the rear side face of the right end of the screwing groove, the stability of the inner bushing after being locked is improved, the inner bushing with proper number can be installed in the inner bushing by repeating the steps, and the inner diameter of the innermost inner bushing is enabled to be corresponding to the size of the outer side face of the pile foundation;
the fourth step: locking the inner bushing: after the inner bushing is installed, the nut is placed in the hexagonal groove at the inner end of the round hole in the inner bushing at the innermost end, and then the fixed sleeve and the inner bushing are locked and connected through the bolt, so that the integrity of the invention is improved;
the fifth step: placing an inner bushing: after the fixing sleeve and the inner bushing are locked, the limiting clamping block of the inner bushing at the innermost end is removed, and a structure formed by the fixing sleeve and the inner bushing is clamped and sleeved on the upper end of the pile foundation;
and a sixth step: replacing the hanging frame: the lifting frame with proper size is replaced according to the size of the pile foundation, and the pile foundation can be under proper downward tension and pressure by placing loads with proper weight in the lifting frame and the upper support frame, so that the uniformity of the pressure applied to the pile foundation is increased;
the seventh step: pile foundation detection: and after the pile foundation is supported for 18-24h under load, taking down the structure consisting of the fixed sleeve and the inner lining from the pile foundation, and manually measuring the outer side surface of the pile foundation to determine whether the bearing capacity of the structure meets the standard.
The invention has the beneficial effects that:
the pile foundation pressure-applying device can detect the bearing capacity of the pile foundation according to the pile foundations with different sizes, and the fixing sleeve and the inner bushing can be quickly adjusted in size, so that a structure formed by the fixing sleeve and the inner bushing can be attached to the outer side surface of the pile foundation, and the uniformity of pressure application of the pile foundation is increased;
the fixing sleeve and the inner bushing are arranged, the clamping and pressing mechanism on the fixing sleeve is matched with the locking mechanism on the inner bushing to increase the connection compactness of the fixing sleeve and the inner bushing, and then the fixing sleeve and the inner bushing are locked and connected through the bolt to increase the integrity of the fixing sleeve and the inner bushing;
the invention is provided with the upper support frame and the hoisting mechanism, the hoisting frame with proper size is replaced according to the size of the pile foundation, and the pile foundation can be in proper lower tension and pressure by placing loads with proper weight in the hoisting frame and the upper support frame, so that the uniformity of the pressure applied to the pile foundation by the invention is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of the structure between the fixing sleeve and the inner liner of the present invention;
fig. 4 is a cross-sectional view between the fixing sleeve and the inner liner of the present invention;
figure 5 is a schematic structural view of the hoisting mechanism of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1 to 5, a pile foundation bearing capacity detection system comprises a fixed sleeve 1, an inner bushing 2, an inner cover plate 3, support columns 4, an upper support frame 5 and a hoisting mechanism 6, wherein the fixed sleeve 1 and the inner bushing 2 are both hollow cylindrical structures, the inner bushing 2 is sequentially sleeved in the hollow structure of the fixed sleeve 1, the cover plate 3 is installed on the top of the fixed sleeve 1, the upper support frame 5 is installed on the top of the cover plate 3 through the support columns 4, the hoisting mechanism 6 is installed on the left side and the right side of the lower end of the fixed sleeve 1, and the fixed sleeve 1 is matched with the inner bushings 2 in different numbers to form different inner diameter sizes.
All be provided with two card pressure mechanisms 7 on the middle part medial surface of fixed cover 1 and the middle part medial surface of neck bush 2, the contained angle between two card pressure mechanisms 7 is one hundred eighty degrees, the size of card pressure mechanism 7 on the fixed cover 1 is greater than the size of card pressure mechanism 7 on the neck bush 2, and the size of card pressure mechanism 7 on the neck bush 2 reduces from the extroversion to the inside in proper order.
The clamping and pressing mechanism 7 comprises a screwing groove 71 and a limiting clamping plate 72, the screwing groove 71 is formed in the inner side face of the middle portion of the fixed sleeve 1 and the inner lining 2, the screwing groove 71 is of an arc-shaped structure, and the limiting clamping plate 72 of the arc-shaped structure is arranged on the upper inner wall and the lower inner wall of the right end of the screwing groove 71.
A locking mechanism 8 is arranged on the outer side surface of each inner bushing 2, and the locking mechanism 8 is matched with a clamping and pressing mechanism 7 arranged on the outer side of the locking mechanism; locking mechanical system 8 include locking hole 81, locking body 82 and reset spring 83, locking hole 81 sets up on the lateral surface of inner liner 2, locking body 82 passes through reset spring 83 and installs on the inside wall of locking hole 81, the middle part of locking body 82 is located between two spacing cardboard 72, during concrete work, locking mechanical system 8 can cooperate with card pressure mechanism 7 for the inner liner 2 of outermost end can lock on the medial surface of fixed cover 1, the inner liner 2 of inner can lock on the inner liner 2 rather than the outer end is adjacent.
The left end of the screwing groove 71 is of a trapezoidal structure, the right end of the trapezoidal structure of the screwing groove 71 corresponds to the left end of the limiting clamping plate 72, when the locking body 82 performs rotation locking action in the screwing groove 71, the locking body 82 can slide to the right end of the trapezoidal structure of the screwing groove 71 along the left end of the trapezoidal structure of the screwing groove 71, and under the guiding effect of the right end of the trapezoidal structure of the screwing groove 71, the middle part of the locking body 82 can slide between the two limiting clamping plates 72.
The locking body 82 is of an I-shaped structure, the middle of the locking body 82 is clamped between the two limiting clamping plates 72, the side faces, close to the limiting clamping plates 72, of the I-shaped structure of the locking body 82 are arc-shaped faces, an arc-shaped rubber pad is arranged on the side face, far away from the reset spring 83, of the locking body 82, the middle of the I-shaped structure of the locking body 82 can be clamped between the two limiting clamping plates 72 in a sliding fit mode, the arc-shaped faces at the front end and the rear end of the locking body 82 can be attached to the side faces of the limiting clamping plates 72, when the locking body 82 moves to the right end position of the screwing groove 71, the rubber pad at the rear end of the locking body 82 can be locked on the rear side face.
Fixed cover 1 and interior bush 2's bottom medial surface all be provided with the arc chute, all install spacing fixture block 21 through bolted connection's mode symmetry on fixed cover 1 and interior bush 2's the lower extreme medial surface, spacing fixture block 21 is located the top of arc chute, all be provided with on every interior bush 2's the lateral surface with fixture block 21 matched with draw-in groove 22, the arc chute of fixed cover 1 and interior bush 2 bottom can prevent that locking body 82 can't the automatic movement to fixed cover 1 or interior bush 2's medial surface, spacing fixture block 21 plays spacing effect to it when installing interior bush 2, make locking mechanical system 8 can remove the left end of card pressure mechanism 7, be convenient for interior bush 2 installs, after interior bush 2 screwed the installation, interior bush 2 can play the effect of support to it.
The fixing sleeve 1 and the inner bush 2 are provided with round holes corresponding to each other in position at the left end and the right end, the inner end of each round hole in each inner bush 2 is provided with a hexagonal groove, the fixing sleeve 1 and the inner bush 2 are connected through bolts at the left end and the right end, the fixing sleeve 1 and the inner bush 2 are connected through the bolts, integrity of the pile foundation pile.
The supporting columns 4 are symmetrically arranged on the upper end face of the middle of the cover plate 3, the upper ends of the supporting columns 4 are arranged in an outward inclined mode, the weight of the load in the upper supporting frame 5 can be enabled to act on the cover plate 3 evenly, and the uniformity of pressure applied to the pile foundation is improved.
The lifting frame 64 is positioned at the inner side of the lower end of the lifting cable 61, the lifting frame 64 is detachably connected with the connecting buckle 63, the lifting frame 64 is positioned at the lower end of the lifting cable 61, so that the lifting cable 61 is obliquely arranged, the effect that the lower tension force can be uniformly applied to the pile foundation is increased, and the lifting frame 64 can be replaced into a proper size according to actual needs.
In addition, the invention provides a detection method of a pile foundation bearing capacity detection system, which comprises the following detection steps:
the first step is as follows: preparation before measurement: according to the external dimension of the pile foundation, an appropriate number of inner bushings 2 are arranged in the fixed sleeve 1;
the second step is that: inserting an inner bushing: inserting the clamping groove 22 on the inner bushing 2 along the position of the limiting clamping block 21 of the fixed sleeve 1, wherein the locking mechanism 8 can automatically contract under the action of the arc chute on the fixed sleeve 1, and the locking mechanism 8 of the inner bushing 2 corresponds to the clamping and pressing mechanism 7 in height when the upper end of the inner bushing 2 is propped against the lower side surface of the cover plate 3;
the third step: screwing the inner bushing: manually rotating the inner bushing 2, enabling the locking body 82 to slide along the left end of the trapezoidal structure of the screwing groove 71, enabling the middle of the locking body 82 to slide between the two limiting clamping plates 72 under the guiding action of the right end of the trapezoidal structure of the screwing groove 71, enabling a rubber pad at the rear end of the locking body 82 to be locked on the rear side face of the right end of the screwing groove 71, increasing the stability of the locked inner bushing 2, and repeating the steps to install a proper number of inner bushings 2 in the inner bushing 2, so that the inner diameter of the innermost inner bushing 2 corresponds to the size of the outer side face of the pile foundation;
the fourth step: locking the inner bushing: after the inner bushing 2 is installed, the nut is placed in the hexagonal groove at the inner end of the round hole in the inner bushing 2 at the innermost end, and then the fixed sleeve 1 and the inner bushing 2 are locked and connected through the bolt, so that the integrity of the invention is improved;
the fifth step: placing an inner bushing: after the fixed sleeve 1 and the inner bushing 2 are locked, the limiting fixture block 21 of the inner bushing 2 at the innermost end is removed, and a structure formed by the fixed sleeve 1 and the inner bushing 2 is clamped and sleeved on the upper end of the pile foundation;
and a sixth step: replacing the hanging frame: the lifting frame 64 with proper size is replaced according to the size of the pile foundation, and the pile foundation can be under proper downward tension and pressure by placing loads with proper weight in the lifting frame 64 and the upper support frame 5, so that the uniformity of the pressure applied to the pile foundation is improved;
the seventh step: pile foundation detection: when the pile foundation supports 20h under the load, take off the structure that fixed cover 1 and neck bush 2 are constituteed from the pile foundation, confirm whether its bearing capacity accords with the standard through artifical measurement to the pile foundation lateral surface.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a pile foundation bearing capacity detecting system, includes fixed cover (1), neck bush (2), apron (3), support column (4), goes up and props frame (5) and hoisting machine structure (6), its characterized in that: the fixing sleeve (1) and the inner bushing (2) are both of hollow cylindrical structures, the inner bushing (2) is sequentially sleeved in the hollow structure of the fixing sleeve (1), the cover plate (3) is installed on the top of the fixing sleeve (1), the upper supporting frame (5) is installed on the top of the cover plate (3) through the supporting column (4), and the left side and the right side of the lower end of the fixing sleeve (1) are respectively provided with a hoisting mechanism (6); wherein:
two clamping and pressing mechanisms (7) are arranged on the inner side surface of the middle part of the fixed sleeve (1) and the inner side surface of the middle part of the inner bushing (2), an included angle between the two clamping and pressing mechanisms (7) is one hundred eighty degrees, the size of the clamping and pressing mechanism (7) on the fixed sleeve (1) is larger than that of the clamping and pressing mechanism (7) on the inner bushing (2), and the sizes of the clamping and pressing mechanisms (7) on the inner bushing (2) are sequentially reduced from outside to inside;
the clamping and pressing mechanism (7) comprises a screwing groove (71) and a limiting clamping plate (72), the screwing groove (71) is formed in the inner side face of the middle portion of the fixed sleeve (1) and the inner lining (2), the screwing groove (71) is of an arc-shaped structure, and the limiting clamping plate (72) of the arc-shaped structure is arranged on the upper inner wall and the lower inner wall of the right end of the screwing groove (71);
a locking mechanism (8) is arranged on the outer side surface of each inner bushing (2), and the locking mechanism (8) is matched with a clamping and pressing mechanism (7) arranged on the outer side of the locking mechanism; the locking mechanism (8) comprises a locking hole (81), a locking body (82) and a return spring (83), the locking hole (81) is formed in the outer side face of the inner bushing (2), the locking body (82) is installed on the inner side wall of the locking hole (81) through the return spring (83), and the middle of the locking body (82) is located between the two limiting clamping plates (72);
hoisting machine construct (6) including hoist cable (61), hanger plate (62), connector link (63) and hang frame (64), the symmetry is installed on the outside bottom of fixed cover (1) around hoist cable (61), all install one hanger plate (62) on the lower extreme of every hoist cable (61), two connector link (63) are all installed to the lower extreme of every hanger plate (62), connector link (63) symmetric distribution is at both ends about hoist cable (61), hang frame (64) and install on the lower extreme of connector link (63).
2. The pile foundation bearing capacity detection system of claim 1, wherein: the left end of the screwing groove (71) is of a trapezoidal structure, and the right end of the screwing groove (71) in the trapezoidal structure corresponds to the left end of the limiting clamping plate (72).
3. The pile foundation bearing capacity detection system of claim 1, wherein: the locking body (82) is of an I-shaped structure, the middle of the locking body (82) is clamped between the two limiting clamping plates (72), the side faces, close to the limiting clamping plates (72), of the I-shaped structure of the locking body (82) are arc-shaped faces, and arc-shaped rubber pads are arranged on the side faces, far away from the reset springs (83), of the locking body (82).
4. The pile foundation bearing capacity detection system of claim 2, wherein: the bottom medial surface of fixed cover (1) and interior bush (2) all be provided with the arc chute, all install spacing fixture block (21) through bolted connection's mode symmetry on the lower extreme medial surface of fixed cover (1) and interior bush (2), spacing fixture block (21) are located the top of arc chute, all be provided with on the lateral surface of every interior bush (2) with fixture block (21) matched with draw-in groove (22).
5. The pile foundation bearing capacity detection system of claim 4, wherein: the left end and the right end of the fixed sleeve (1) and the inner bush (2) are respectively provided with a round hole corresponding to each other, the inner end of the round hole on each inner bush (2) is provided with a hexagonal groove, and the left end and the right end of the fixed sleeve (1) and the inner bush (2) are connected through bolts.
6. The pile foundation bearing capacity detection system of claim 1, wherein: the support columns (4) are symmetrically arranged on the upper end face of the middle of the cover plate (3), and the upper ends of the support columns (4) are arranged in an outward inclined mode.
7. The pile foundation bearing capacity detection system of claim 1, wherein: the hanging frame (64) is positioned at the inner side of the lower end of the sling (61), and the hanging frame (64) is detachably connected with the connecting buckle (63).
8. The pile foundation bearing capacity detection system of claim 5, wherein: the detection method of the pile foundation bearing capacity detection system comprises the following detection steps:
the first step is as follows: preparation before measurement: according to the external dimension of the pile foundation, an appropriate number of inner bushings (2) are arranged in the fixed sleeve (1);
the second step is that: inserting an inner bushing: inserting a clamping groove (22) on the inner bushing (2) along the position of a limiting clamping block (21) of the fixed sleeve (1), wherein when the upper end of the inner bushing (2) is propped against the lower side surface of the cover plate (3), the locking mechanism (8) of the inner bushing (2) corresponds to the clamping and pressing mechanism (7) in height;
the third step: screwing the inner bushing: manually rotating the inner bushing (2), enabling the locking body (82) to slide along the left end of the trapezoidal structure of the screwing groove (71), enabling the middle of the locking body (82) to slide between the two limiting clamping plates (72) under the guiding effect of the right end of the trapezoidal structure of the screwing groove (71), enabling a rubber pad at the rear end of the locking body (82) to be locked on the rear side face of the right end of the screwing groove (71), increasing the stability of the inner bushing (2) after locking, and repeating the steps to install a proper number of inner bushings (2) in the inner bushing (2) so that the inner diameter of the innermost inner bushing (2) corresponds to the size of the outer side face of the pile foundation;
the fourth step: locking the inner bushing: after the inner bushing (2) is installed, a nut is placed in a hexagonal groove at the inner end of a round hole in the inner bushing (2) at the innermost end, and then the fixed sleeve (1) and the inner bushing (2) are locked and connected through a bolt, so that the integrity of the pile foundation bearing capacity detection system is improved;
the fifth step: placing an inner bushing: after the fixed sleeve (1) and the inner bushing (2) are locked, the limiting clamping block (21) of the inner bushing (2) at the innermost end is removed, and a structure formed by the fixed sleeve (1) and the inner bushing (2) is clamped and sleeved on the upper end of the pile foundation;
and a sixth step: replacing the hanging frame: the lifting frame (64) with a proper size is replaced according to the size of the pile foundation, and the pile foundation can be in proper lower tension and pressure by placing loads with proper weight in the lifting frame (64) and the upper support frame (5), so that the pressing uniformity of the pile foundation bearing capacity detection system to the pile foundation is increased;
the seventh step: pile foundation detection: after the pile foundation is supported for 18-24h under load, the structure formed by the fixed sleeve (1) and the inner lining (2) is taken down from the pile foundation, and whether the bearing capacity of the structure meets the standard or not is determined through manual measurement of the outer side surface of the pile foundation.
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| CN110065884A (en) * | 2019-05-08 | 2019-07-30 | 中国二十冶集团有限公司 | A kind of pile press machine hello stake hanging method and lifting device |
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