Automatic pressing management system for press-in type open caisson

Abstract

The utility model discloses an automatic press-down management system of a press-in type open caisson, a plurality of vertical through holes are formed in the open caisson at intervals in the circumferential direction of the open caisson, and the automatic press-down management system comprises a press-down device and various measuring instruments; the pressing device comprises a center hole jack, an anchor cable and a ground anchor, the center hole jack is installed at the top of the open caisson and located above the vertical through hole, the ground anchor is located in the soil body below the vertical through hole, the upper end of the anchor cable sequentially penetrates through the vertical through hole and the center hole jack and is fixed through an anchoring nut, and the lower end of the anchor cable is connected with the ground anchor; the various measuring instruments comprise a settlement meter, a clinometer, a surface friction meter, a water pressure meter and a blade foot counter-force meter, the settlement meter is mounted on the ground, the clinometer and the surface friction meter are mounted on the outer wall of a blade foot of the open caisson, the water pressure meter is mounted on the inner wall of the blade foot of the open caisson, and the blade foot counter-force meter is mounted at the bottommost part of the blade foot of the open caisson. The open caisson has the advantage that the open caisson can rapidly and stably sink.

Description

Technical Field

[0001] The utility model relates to the technical field of open caisson construction, in particular to an automatic pressing-down management system for a pressed-in open caisson. Background Technique

[0002] An open caisson is a wellbore-shaped structure. It excavates soil inside the well and sinks to the designed elevation by relying on its own gravity to overcome the frictional resistance of the well wall, and then undergoes concrete bottom sealing and filling of the well holes to become the foundation of a bridge pier or other structures. Generally, it is used in the construction of large bridge pier foundations, sewage pumping stations, large equipment foundations, civil air defense shelters, shield assembly wells, and the construction of retaining devices for underground roads and stations and hydraulic foundations.

[0003] The choice of the open caisson sinking construction method depends on factors such as the size of the construction site, hydrogeological conditions, and the sensitivity of surrounding buildings. Under complex stratum conditions or in large open caisson projects, it is difficult to overcome the frictional resistance between the well wall and the soil and the resistance under the cutting edge only by relying on the self-weight of the open caisson. Therefore, sinking assistance measures need to be used to promote the sinking of the open caisson. Pressing weight for sinking is the most commonly used open caisson sinking assistance measure, but the sinking force provided by direct loading methods such as stacking loads and building the open caisson is limited. In actual open caisson projects, a reaction force system is often used to provide the acting force to promote the sinking of the open caisson. However, the current reaction force system for the pressed-in open caisson sinking generally requires a large construction site and has a greater adverse impact on the surrounding environment and buildings during the construction process; moreover, its structure is complex, the construction procedures of the open caisson change frequently, and it is difficult to be applicable to the situation of rapid and stable construction of large open caissons; in addition, in such reaction force systems, bearing brackets, precast piles, etc. are mostly used, which will generate additional acting forces on the open caisson wall and are not conducive to the force on the well wall. Furthermore, usually, the working state of the jack cannot be accurately controlled, and the problem of open caisson inclination may occur. Summary of the Invention

[0004] The purpose of the utility model is to provide an automatic pressing-down management system for a pressed-in open caisson according to the deficiencies of the above-mentioned prior art. The system consists of a pressing-down device and a variety of measuring instruments. The pressing-down device is used for the construction of the open caisson, and the variety of measuring instruments can monitor the state of the open caisson during the sinking process so as to adjust the working state of the pressing-down device, thereby realizing the rapid and stable sinking of the open caisson.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] An automatic pressing-down management system for a pressed-in open caisson, wherein a plurality of vertical through holes are arranged at intervals along the circumferential direction of the open caisson, and the automatic pressing-down management system includes a pressing-down device and a variety of measuring instruments; the pressing-down device includes a hole-through jack, a cable anchor and a ground anchor, the hole-through jack is installed at the top of the open caisson and above the vertical through holes, the ground anchor is located in the soil body below the vertical through holes, the upper end of the cable anchor sequentially penetrates through the vertical through holes and the hole-through jack and is fixed by an anchoring nut, and the lower end is connected to the ground anchor; the variety of measuring instruments include a settlement gauge, an inclinometer, a skin friction gauge, a water pressure gauge and a cutting edge reaction force gauge, the settlement gauge is installed on the ground, the inclinometer and the skin friction gauge are installed on the outer wall of the cutting edge of the open caisson, the water pressure gauge is installed on the inner wall of the cutting edge of the open caisson, and the cutting edge reaction force gauge is installed at the bottommost part of the cutting edge of the open caisson.

[0007] The hole-through jack is driven by a hydraulic power unit.

[0008] It further includes a control device, and the control device is respectively connected to the settlement gauge, the inclinometer, the skin friction gauge, the water pressure gauge, the cutting edge reaction force gauge and the hydraulic power unit.

[0009] The settlement gauge, the inclinometer, the skin friction gauge, the water pressure gauge and the cutting edge reaction force gauge are all arranged along the circumferential direction of the open caisson.

[0010] A steel pipe is arranged in the vertical through hole.

[0011] The open caisson is a circular open caisson.

[0012] The advantages of the present utility model are: it is composed of a pressing-down device and a variety of measuring instruments. The pressing-down device is used for the construction of the open caisson, and the variety of measuring instruments can monitor the state of the sinking process of the open caisson, so as to adjust the working state of the pressing-down device, thereby realizing the rapid and stable sinking of the open caisson. Description of the Drawings

[0013] Figure 1 It is an overall schematic diagram of the automatic pressing-down management system of the present utility model;

[0014] Figure 2 It is an elevation view of the open caisson of the present utility model;

[0015] Figure 3 It is a plan view of the open caisson of the present utility model. Detailed Embodiment

[0016] The features of the present utility model and other related features are further described in detail below with reference to the drawings through embodiments for the understanding of those skilled in the same industry:

[0017] AsFigures 1 - 3 As shown, the marks in the figure represent respectively:

[0018] Caisson 1, vertical through hole 2, steel pipe 3, through-hole jack 4, anchor cable 5, ground anchor 6, anchor nut 7, settlement meter 8, inclinometer 9, surface friction meter 10, water pressure gauge 11, blade reaction meter 12, hydraulic power unit 13, control device 14.

[0019] Example: Figures 1 - 3 As shown, the present embodiment relates to an automatic downward pressure management system for a press-in caisson, wherein the caisson 1 is a circular caisson, and a plurality of vertical through holes 2 are provided at intervals along its circumference, and a steel pipe 3 is provided in the vertical through hole 2. The automatic downward pressure management system mainly comprises a downward pressure device, a plurality of measuring instruments and a control device 14, and the downward pressure device and the plurality of measuring instruments are respectively connected to the control device 14, and the downward pressure device is used for pressing down the caisson 1, and the plurality of measuring instruments are used for measuring various parameters of the caisson 1 during the sinking process, and the various parameters measured by the plurality of measuring instruments are analyzed by the control device to adjust the working state of the downward pressure device to realize the rapid and smooth sinking of the caisson 1.

[0020] like Figures 1 - 3 As shown, the downward pressure device includes a through-hole jack 4, an anchor cable 5 and a ground anchor 6. The through-hole jack 4 is installed on the top of the caisson 1 and is located above the vertical through hole 2. The ground anchor 6 is located in the soil below the vertical through hole 2. The upper end of the anchor cable 5 sequentially passes through the vertical through hole 2 and the through-hole jack 4 and is fixed by the anchor nut 7. The lower end is connected to the ground anchor 6. The through-hole jack 4 is driven by a hydraulic power unit 13. The hydraulic power unit 13 drives the through-hole jack 4 to work. The through-hole jack 4 extends its oil cylinder upward to support the anchor nut 7. Since the anchor cable 5 is fastened to the anchor nut 7, the anchor cable 5 is subjected to the pulling force generated by the upward movement of the oil cylinder of the through-hole jack 4, and the ground anchor 6 is subjected to the upward pulling force generated by the anchor cable 5, so that the downward pressure generated by the through-hole jack 4 is transmitted to the caisson 1 through itself, so that the caisson 1 sinks.

[0021] like Figures 1 - 3 As shown, the various measuring instruments include a settlement meter 8, an inclinometer 9, a surface friction meter 10, a water pressure gauge 11 and a blade foot reaction meter 12. The settlement meter 8 is installed on the ground, the inclinometer 9 and the surface friction meter 10 are installed on the outer wall of the blade foot of the caisson 1, the water pressure gauge 11 is installed on the inner wall of the blade foot of the caisson 1, and the blade foot reaction meter 12 is installed at the bottom of the blade foot of the caisson 1. The settlement meter 8, the inclinometer 9, the surface friction meter 10, the water pressure gauge 11 and the blade foot reaction meter 12 are respectively arranged along the circumference of the caisson 1. The settlement meter 8 is used to measure the settlement of the ground, the inclinometer 9 is used to measure the inclination of the caisson 1, the surface friction meter 10 is used to measure the friction between the caisson 1 and the soil, the water pressure gauge 11 is used to measure the water pressure, and the blade foot reaction meter 12 is used to measure the reaction force (load) of the blade foot.

[0022] In this embodiment, the control device 14 is respectively connected to the settlement gauge 8, the inclinometer 9, the surface friction meter 10, the water pressure gauge 11, the cutting edge reaction force gauge 12 and the hydraulic power unit 13.

[0023] The beneficial technical effects of this embodiment are as follows: It is composed of a pressing device and a variety of measuring instruments. The pressing device is used for the construction of the caisson, and the variety of measuring instruments can monitor the state of the caisson during the sinking process, so as to adjust the working state of the pressing device, thereby realizing the rapid and stable sinking of the caisson.

[0024] Although the above embodiments have detailed the concept and embodiments of the purpose of the present invention with reference to the drawings, those of ordinary skill in the art can recognize that various improvements and transformations can still be made to the present invention without departing from the scope defined by the claims. Therefore, they will not be elaborated one by one here.

Claims

1. An automatic downward pressure management system for a press-in caisson, characterized in that: The caisson is provided with a plurality of vertical through holes at intervals along its circumference, and the automatic downward pressure management system includes a downward pressure device and a plurality of measuring instruments; the downward pressure device includes a through-hole jack, an anchor cable and a ground anchor, the through-hole jack is installed at the top of the caisson and is located above the vertical through hole, the ground anchor is located in the soil below the vertical through hole, the upper end of the anchor cable sequentially passes through the vertical through hole and the through-hole jack and is fixed by an anchor nut, and the lower end is connected to the ground anchor; the plurality of measuring instruments include a settlement meter, an inclinometer, a surface friction meter, a water pressure meter and a blade foot reaction meter, the settlement meter is installed on the ground, the inclinometer and the surface friction meter are installed on the outer wall of the blade foot of the caisson, the water pressure meter is installed on the inner wall of the blade foot of the caisson, and the blade foot reaction meter is installed at the bottom of the blade foot of the caisson.

2. The automatic downward pressure management system for a push-in caisson according to claim 1, characterized in that: The through-core jack is driven by a hydraulic power unit.

3. The automatic downward pressure management system for a push-in caisson according to claim 2, characterized in that: It also includes a control device, which is connected to the sedimentation meter, the inclinometer, the surface friction meter, the water pressure meter, the blade foot reaction force meter and the hydraulic power unit respectively.

4. The automatic downward pressure management system for a push-in caisson according to claim 1, characterized in that: The settlement meter, the inclinometer, the surface friction meter, the water pressure meter and the blade foot reaction meter are respectively arranged along the circumference of the caisson.

5. The automatic downward pressure management system for a push-in caisson according to claim 1, characterized in that: A steel pipe is arranged in the vertical through hole.

6. The automatic downward pressure management system for a push-in caisson according to claim 1, characterized in that: The caisson is a circular caisson.

Images