A settlement monitoring installation structure for a underpinning pile foundation

Abstract

The application discloses a kind of settlement monitoring installation structures of underpinning pile foundation, including pile foundation, the pile foundation is equipped with multiple reinforcing bars, the top of multiple reinforcing bars is arranged above the top surface of the pile foundation, characterized by: the side of the pile foundation is further equipped with at least one static level, the static level is installed on the reinforcing bar by connecting mechanism;The connecting mechanism includes connecting plate and sleeve, the upper side of the connecting plate is rotatably connected with the outer wall of the sleeve, the sleeve is sleeved on one reinforcing bar, the bottom of the sleeve is close to or abuts on the top of the pile foundation, the inner side of the connecting plate abuts on the side wall of the pile foundation, and the static level is installed on the outer side of the connecting plate.The application improves the convenience of settlement monitoring instrument installation and detection, and ensures the monitoring accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of infrastructure projects, in particular to a settlement monitoring installation structure for underpinning pile foundation. BACKGROUND

[0002] In the prior art, pile foundation is mainly used for bearing and supporting of buildings. However, due to the settlement of the foundation after a period of time, the building will be inclined and other safety hazards will occur. Or the subsequent load exceeds the designed load, which will also cause great safety hazards.

[0003] Therefore, in order to ensure the safety of the building, the pile foundation will be underpinned, that is, the pile foundation will be replaced by adding piles. During the use of the underpinned pile foundation, the added pile itself will settle under the gradually applied external load. In order to solve this technical problem, the prior art, such as patent No. 201910154178.4, patent name: counterforce frame for providing pre-stress to underpinned pile foundation and its use method, discloses applying pre-stress to the pile foundation to apply pressure in advance and make it settle in advance. However, in general, the settlement is small after a period of time, and many times the settlement cannot be observed, and it is not clear whether the settlement occurs. In particular, after use, partial settlement may occur. In order to test the settlement degree, a static water level instrument is installed. However, the static water level instrument is directly fixed on the side wall of the pile foundation during installation. During fixing, a hole is punched on the pile foundation, and the static water level instrument is installed on the side wall through the expansion bolt. In this way, a hole needs to be punched on the pile foundation. For large-size pile foundation, the hole has little damage to the pile foundation. For some small pile foundation, punching may damage the pile foundation. For small-size pile foundation, a steel wire can be directly bound on the outside of the pile foundation to fix the static water level instrument thereon. In this way, the steel wire is easy to move downward, so that the static water level instrument cannot be accurately detected. Therefore, how to stably install the static water level instrument is the direction that the person skilled in the art needs to strive for. SUMMARY

[0004] The purpose of the present application is to provide a settlement monitoring installation structure for underpinned pile foundation, which improves the convenience of installation of the settlement monitoring instrument.

[0005] To achieve the above purpose, the technical solution adopted by the present application is: a settlement monitoring installation structure for underpinned pile foundation, comprising a pile foundation, a plurality of steel bars are arranged in the pile foundation, the top of the plurality of steel bars is arranged above the top surface of the pile foundation, at least one static water level instrument is installed on the side of the pile foundation, and the static water level instrument is installed on the steel bar through a connecting mechanism.

[0006] The connecting mechanism comprises a connecting plate and a sleeve, the upper portion of the connecting plate is rotationally connected with the outer wall of the sleeve, the sleeve is sleeved on one of the steel bars, the bottom of the sleeve is close to or abuts against the top of the pile foundation, the inner side of the connecting plate abuts against the side wall of the pile foundation, and the static level instrument is installed on the outer side of the connecting plate.

[0007] In the above technical solution, the upper portion of the connecting plate is rotationally connected with the outer wall of the sleeve through a rotating shaft;

[0008] A screw hole is arranged on the sleeve above the rotating shaft, the screw hole is arranged directly above the rotating shaft, a limiting bolt is screwed in the screw hole, the inner end of the limiting bolt abuts against the outer surface of the corresponding steel bar, and the limiting bolt locks and limits the sleeve on the steel bar.

[0009] In the above technical solution, an arc-shaped groove is arranged on the top of the connecting plate, the arc-shaped groove is coaxially arranged with the rotating shaft, and the arc-shaped groove is arranged opposite to the screw hole, and the inner end of the limiting bolt is connected with the screw hole through the arc-shaped groove.

[0010] In the above technical solution, a screw head is arranged on the outer end of the limiting bolt, and the screw head is arranged on the outer side of the connecting plate.

[0011] A spring and a gasket are sleeved on the limiting bolt, and the gasket and the spring are arranged between the connecting plate and the screw head.

[0012] The spring is arranged between the gasket and the screw head, the outer end of the spring abuts against the inner side of the screw head, the inner end of the spring abuts against the gasket, and the spring pushes the gasket to move inward and makes the inner side of the upper portion of the connecting plate abut against the outer wall of the sleeve.

[0013] In the above technical solution, the connecting plate is in Z-shaped structure, the connecting plate comprises an upper plate, a lower plate and an intermediate plate, the upper plate is arranged above the inner side of the lower plate, the outer end of the intermediate plate is connected with the top of the lower plate, the inner end of the intermediate plate is connected with the bottom of the upper plate, the inner wall of the upper plate is connected with the outer wall of the sleeve, the inner wall of the lower plate is close to or abuts against the side wall of the pile foundation, and the static level instrument is installed on the outer wall of the lower plate.

[0014] In the above technical solution, the inner end of the intermediate plate is arranged above the pile foundation.

[0015] In the above technical solution, a extension pipe is detachably arranged below the sleeve, the extension pipe is sleeved on the steel bar, the bottom of the extension pipe abuts against the top surface of the pile foundation, and the bottom of the sleeve abuts against the top surface of the extension pipe.

[0016] By means of the technical scheme, the present application has the following advantages compared with the prior art:

[0017] 1. The static water level in the present application is directly connected to the steel reinforcement on the upper surface of the pile foundation through the connecting mechanism, the connecting plate and the sleeve are rotationally connected, and the sleeve is locked on the steel reinforcement through the limiting bolt, so that there is no need to punch holes on the pile foundation, the pile foundation is not damaged, and the strength, firmness and safety of the pile foundation can be effectively ensured.

[0018] 2. The connecting plate and the sleeve are rotationally connected in the present application, so that the levelness of the connecting plate can be adjusted, the levelness of the static water level can be ensured, the installation precision of the static water level is ensured, and the monitoring precision and quality of the static water level on the pile foundation settlement are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the embodiment one of the present application (two static water levels are installed, the sleeve on the left side is directly abutted on the top surface of the pile foundation, and the sleeve on the right side is provided with an extension pipe below);

[0020] Figure 2 is a partial enlarged view in Figure 1 ;

[0021] Figure 3 is a structural schematic view of the outer side of the connecting plate and the sleeve connection in the embodiment one of the present application;

[0022] Figure 4 is a structural schematic view of the outer side of the connecting plate and the sleeve connection in another embodiment of the present application (the connecting plate is provided with a second arc-shaped groove on the upper surface).

[0023] Wherein: 1, pile foundation; 2, steel reinforcement; 3, static water level; 4, connecting mechanism; 5, connecting plate;

[0024] 6, sleeve; 7, rotating shaft; 8, screw hole; 9, limiting bolt; 10, arc-shaped groove; 11, screw head; 12, spring; 13, gasket; 14, second arc-shaped groove; 15, second bolt; 16, upper plate; 17, lower plate; 18, middle plate; 19, extension pipe. DETAILED DESCRIPTION

[0025] The present application will be further described below in combination with the drawings and embodiments:

[0026] Embodiment one: referring to Figures 1 to 4 , a settlement monitoring installation structure of underpinning pile foundation, comprising a pile foundation 1, a plurality of steel reinforcements 2 are arranged in the pile foundation 1, the top of the plurality of steel reinforcements 2 is arranged above the top surface of the pile foundation 1, at least one static water level 3 is installed on the side of the pile foundation 1, and the static water level 3 is installed on the steel reinforcement 2 through a connecting mechanism 4.

[0027] The connecting mechanism 4 comprises a connecting plate 5 and a sleeve 6, the upper side of the connecting plate 5 is rotationally connected with the outer wall of the sleeve 6, the sleeve 6 is sleeved on one of the reinforcing bars 2, the bottom of the sleeve 6 is close to or abuts against the top of the pile foundation 1, the inner side of the connecting plate 5 abuts against the side wall of the pile foundation 1, and the static level 3 is installed on the outer side of the connecting plate 5.

[0028] In the embodiment, in actual use, after the pile foundation is replaced by underpinning, a counterforce is applied to the pile foundation by the counterforce frame to push the pile foundation to actively settle, and when the settlement reaches a certain degree, the settlement is very small or not obvious. Therefore, the static level is installed on the pile foundation. When the static level is installed, the static level can be pre-installed on the connecting plate, and then the static level is installed on the pile foundation through the connecting mechanism. When the static level is installed, the sleeve is sleeved on the reinforcing bar, and the connecting plate is rotated to adjust the levelness of the static level (the reinforcing bar is not completely vertical, so after the sleeve is sleeved on the reinforcing bar, the verticality of the connecting plate is insufficient, that is, the levelness of the static level is insufficient), so that the static level is leveled, and the static level is quickly installed and fixed. When the pile foundation is actually used, the corresponding connecting object is directly installed on the top of the pile foundation, and the top of the pile foundation, the reinforcing bar at the top and the top of the connecting mechanism are covered, so that the static level does not need to be punched on the pile foundation.

[0029] Referring to Figures 1 to 3 As shown in the figure, the upper side of the connecting plate 5 is rotationally connected with the outer wall of the sleeve 6 through a rotating shaft 7;

[0030] A screw hole 8 is arranged on the sleeve 6 above the rotating shaft 7, the screw hole 8 is arranged directly above the rotating shaft 7, a limiting bolt 9 is screwed in the screw hole 8, the inner end of the limiting bolt 9 abuts against the outer surface of the corresponding reinforcing bar 2, and the limiting bolt 9 locks and limits the sleeve 6 on the reinforcing bar 2.

[0031] An arc-shaped groove 10 is arranged on the top of the connecting plate 5, the arc-shaped groove 10 is coaxially arranged with the rotating shaft 7, and the arc-shaped groove 10 is arranged opposite to the screw hole 8, the inner end of the limiting bolt 9 is connected with the screw hole 8 through the arc-shaped groove 10.

[0032] In the embodiment, after the sleeve is sleeved on the reinforcing steel bar, the weight given to the connecting plate by the static level instrument makes the connecting plate perpendicular to the horizontal plane, so that the static level instrument is horizontal, and then the limiting bolt is rotated inward to make the inner end of the limiting bolt abut against the outer wall of the reinforcing steel bar, so that the sleeve is locked on the reinforcing steel bar. Further, the connecting plate is rotationally connected with the sleeve through the rotating shaft, so that, after the sleeve is installed on the reinforcing steel bar, the connecting plate can rotate around the sleeve due to the fact that the reinforcing steel bar is not perpendicular. Therefore, by the arrangement of the arc-shaped slot, the limiting bolt is screwed through the arc-shaped slot and the screw hole, so that the rotation angle of the connecting plate can also be limited by the limiting bolt and the arc-shaped slot. If the rotation angle is not enough to compensate for the inclination of the reinforcing steel bar, the reinforcing steel bar can be manually adjusted to make the reinforcing steel bar close to the vertical, so that the rotation adjustment angle of the connecting plate can be satisfied, so that the connecting plate can be perpendicular to the horizontal plane, that is, the static level instrument can be parallel to the horizontal plane, thereby ensuring the detection precision and quality of the static level instrument in subsequent detection.

[0033] Further, referring to Figures 1 to 3 As shown in the figure, the outer end of the limiting bolt 9 is provided with a screw head 11, and the screw head 11 is arranged on the outer side of the connecting plate 5.

[0034] A spring 12 and a gasket 13 are sleeved on the limiting bolt 9, and the gasket 13 and the spring 12 are arranged between the connecting plate 5 and the screw head 11.

[0035] The spring 12 is arranged between the gasket 13 and the screw head 11, the outer end of the spring 12 abuts against the inner side of the screw head 11, the inner end of the spring 12 abuts against the gasket 13, and the spring 12 pushes the gasket 13 to move inward and makes the upper inner side of the connecting plate 5 abut against the outer wall of the sleeve.

[0036] In the embodiment, in order to prevent the connecting plate from shaking after the sleeve is installed, thereby affecting the detection precision of the static level instrument, the connecting plate needs to be fixed after the sleeve is installed. Therefore, in the embodiment, after the inner end of the limiting bolt abuts against the outer surface of the reinforcing steel bar, it cannot be ensured that the screw head can also abut against the outer wall of the connecting plate to fix the connecting plate. Therefore, the spring and the gasket are arranged, the screw head always gives a limiting force to the spring, always gives a pushing force to the spring in the backward direction, and when the limiting bolt is rotated inward, the screw head also approaches the connecting plate. Therefore, when the limiting bolt locks the sleeve on the reinforcing steel bar, the distance between the screw head and the connecting plate is smaller, that is, the spring is continuously compressed, so that the restoring force of the spring is greater. The connecting plate is pushed inward by the restoring force of the spring, and the inner wall of the connecting plate abuts against the outer wall of the sleeve by the pushing force of the spring, so that the connecting plate is limited, and the connecting plate is prevented from rotating due to some external force, thereby ensuring the levelness of the static level instrument.

[0037] Further, as another embodiment, referring to Figure 4 As shown in the figure, the spring can also not be provided, and a second arc-shaped groove 14 can also be provided on the basis of the spring and directly on the connecting plate between the rotating shaft 7 and the arc-shaped groove 10. The second arc-shaped groove is coaxially provided between the rotating shaft, a second screw hole is provided on the sleeve between the screw hole and the rotating shaft, a second screw bolt 15 is screwed in the second screw hole, the inner end of the second screw bolt is screwed through the second arc-shaped groove and the second screw hole, and after the position of the connecting plate is adjusted, the second screw bolt is screwed inward, the screw head of the second screw bolt abuts against the outer side of the connecting plate, so that the connecting plate and the sleeve are locked and fixed.

[0038] As shown in the figure, Figure 1 , 2 As shown in the figure, the connecting plate 5 is in a Z-shaped structure, the connecting plate includes an upper plate 16, a lower plate 17 and an intermediate plate 18, the upper plate 16 is provided above the inner side of the lower plate 17, the outer end of the intermediate plate 18 is connected to the top of the lower plate 17, the inner end of the intermediate plate 18 is connected to the bottom of the upper plate 16, the inner wall of the upper plate 16 is connected to the outer wall of the sleeve 6, the inner wall of the lower plate 17 is close to or abuts against the side wall of the pile foundation 1, and the static water level instrument 3 is installed on the outer wall of the lower plate 17.

[0039] The inner end of the intermediate plate 18 is provided above the pile foundation 1.

[0040] In the embodiment, since there is a spacing between the reinforcing steel bars and the outer wall of the pile foundation, the connecting plate is in a Z-shaped structure, so that the lower plate can be outside the pile foundation, and the convenience and installation quality of the static water level instrument can be ensured.

[0041] As shown in the figure, Figure 1 , 2 As shown in the figure, a extending pipe 19 is detachably placed below the sleeve 6, the extending pipe 19 is sleeved on the reinforcing steel bars 2, the bottom of the extending pipe 19 abuts against the top surface of the pile foundation 1, and the bottom of the sleeve 6 abuts against the top surface of the extending pipe 19.

[0042] In the embodiment, the extending pipe can be provided or not provided, and according to the height at which the static water level instrument needs to be installed, the extending pipe is installed to raise the static water level instrument or a corresponding length of the extending pipe is selected to adjust the height position of the static water level instrument.

[0043] In the embodiment, a plurality of static water level instruments can be installed on the pile foundation, and the heights of different static water level instruments are inconsistent, so that the settlement degree and whether the pile foundation is inclined can be detected (if the two static water level instruments are at two ends of the pile foundation and are inclined to one side, the detection data of the two static water level instruments are different, and it can be known to which side the pile foundation is inclined).

[0044] In the description of the present application, it is to be understood by the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, for example, two of them form a mechanical abutment or abutment connection mode by abutting, touching and the like, two of them can also be directly hung or hung through an intermediate medium, or two elements can be connected in communication or interact with each other. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A settlement monitoring installation structure of a replacement pile foundation, comprising a pile foundation, a plurality of reinforcing steels are arranged in the pile foundation, the top of the plurality of reinforcing steels is arranged above the top surface of the pile foundation, characterized in that: The side of the pile foundation is also provided with at least one static level instrument, which is installed on the steel bar through a connecting mechanism; The connecting mechanism comprises a connecting plate and a sleeve, the upper portion of the connecting plate is rotationally connected with the outer wall of the sleeve, the sleeve is sleeved on one of the steel bars, the bottom of the sleeve is close to or abuts against the top of the pile foundation, the inner side of the connecting plate abuts against the side wall of the pile foundation, and the static level instrument is installed on the outer side of the connecting plate; The connecting plate is in Z-shaped structure, and comprises an upper plate, a lower plate and an intermediate plate, the upper plate is arranged above the inner side of the lower plate, the outer end of the intermediate plate is connected with the top of the lower plate, the inner end of the intermediate plate is connected with the bottom of the upper plate, the inner wall of the upper plate is connected with the outer wall of the sleeve, the inner wall of the lower plate is close to or abuts against the side wall of the pile foundation, and the static level instrument is installed on the outer wall of the lower plate; The bottom of the sleeve is also detachably provided with an extension pipe, the extension pipe is sleeved on the steel bar, the bottom of the extension pipe abuts against the top surface of the pile foundation, and the bottom of the sleeve abuts against the top surface of the extension pipe.

2. The settlement monitoring installation structure of a underpinning pile foundation according to claim 1, characterized in that: The upper portion of the connecting plate is rotationally connected with the outer wall of the sleeve through a rotating shaft; A screw hole is arranged on the sleeve above the rotating shaft, the screw hole is arranged directly above the rotating shaft, a limiting bolt is screwed in the screw hole, the inner end of the limiting bolt abuts against the outer surface of the corresponding steel bar, and the limiting bolt locks and limits the sleeve on the steel bar.

3. The settlement monitoring installation structure of a underpinning pile foundation according to claim 2, characterized in that: An arc-shaped groove is arranged on the top of the connecting plate, the arc-shaped groove is coaxially arranged with the rotating shaft, and the arc-shaped groove is arranged directly opposite to the screw hole, and the inner end of the limiting bolt is connected with the screw hole through the arc-shaped groove.

4. The settlement monitoring installation structure of a underpinning pile foundation according to claim 3, characterized in that: The outer end of the limiting bolt is provided with a screw head, and the screw head is arranged on the outer side of the connecting plate; A spring and a gasket are sleeved on the limiting bolt, and the gasket and the spring are arranged between the connecting plate and the screw head; The spring is arranged between the gasket and the screw head, the outer end of the spring abuts against the inner side of the screw head, the inner end of the spring abuts against the gasket, and the spring pushes the gasket to move inward and makes the inner side of the upper portion of the connecting plate abut against the outer wall of the sleeve.

5. The settlement monitoring installation structure of a underpinning pile foundation according to claim 4, characterized in that: The inner end of the intermediate plate is arranged above the pile foundation.

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