CN209958381U - Open caisson sinking overall process prevention alarm system that rectifies - Google Patents
Open caisson sinking overall process prevention alarm system that rectifies Download PDFInfo
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- CN209958381U CN209958381U CN201920529230.5U CN201920529230U CN209958381U CN 209958381 U CN209958381 U CN 209958381U CN 201920529230 U CN201920529230 U CN 201920529230U CN 209958381 U CN209958381 U CN 209958381U
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Abstract
The utility model discloses an open caisson whole process of sinking prevention alarm system that rectifies, include the roof pressure and entangle the mechanism, the roof pressure is entangled the mechanism and is evenly equipped with more than three groups along the circumference of treating the pit shaft that sinks, and the roof pressure is entangled the top iron that the mechanism includes the pneumatic cylinder and is connected with the extension bar of pneumatic cylinder, is equipped with the caulking groove on the roof pressure face of top iron, and the embedded tetrafluoro plate rubber support that is equipped with of caulking groove, the shape of the roof pressure face of tetrafluoro plate rubber support and the surface looks adaptation of treating the pit shaft that sinks, the roof pressure face of tetrafluoro plate rubber support be used for with the surface sliding fit who treats the pit shaft that sinks. The utility model discloses can realize in time rectifying in the pit shaft overall process that sinks, it is efficient to rectify, need not excavate and rectify a deviation, need not wait to rectify again after the great degree of skew, and not only convenient high-efficient consumes the manual work less, and the cost is lower moreover.
Description
Technical Field
The utility model relates to a construction technical field especially relates to open caisson sinking technology.
Background
The open caisson construction is completed by utilizing the dead weight of the prefabricated reinforced concrete well body and taking out soil in an artificial or mechanical well to cooperate with the well body to sink. The open caisson construction ensures the relative stability of soil around the well body, but has certain quality risks, such as the well body stopping sinking, the well body deflection, the sinking stall and even the sinking excess in the open caisson process. The well body deflection in the sinking process is a common problem in the open caisson construction, and the counter measure in the prior art is to correct the well body afterwards, and then press the well body (often, a part of earthwork needs to be excavated) after the well body deflection is found, so that the well body returns to the preset position. The engineering quantity of post correction is large, more labor is consumed, the correction cost is high, the correction efficiency is low, and earth needs to be backfilled after correction to ensure the stability of the soil around the open caisson. The traditional deviation rectifying method is to rectify deviation after the deviation degree of a shaft is higher, and has the defects of difficult deviation rectification and higher deviation rectifying cost.
The tetrafluoro plate rubber support is widely applied to bridges, is horizontally arranged and is used for supporting superstructure. In the design code of Highway reinforced concrete and prestressed concrete bridges and culverts (JTGD 62-2004), the tetrafluoro plate rubber support is horizontally arranged. When determining the open caisson construction scheme, the skilled person can not find the requirement of horizontally arranging the tetrafluoro plate rubber support, so the tetrafluoro plate rubber support never appears in the open caisson construction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an open caisson sinking overall process prevention alarm system that rectifies that it is efficient, with low costs to rectify rectifies.
In order to realize the aim, the whole deviation rectifying and preventing alarm system for the sinking process of the open caisson comprises three or more groups of top pressure rectifying mechanisms which are uniformly arranged along the circumferential direction of the shaft to be sunk, and each top pressure rectifying mechanism is directly supported on the ground after the excavation of the periphery of the sinking shaft or supported on the ground after the excavation of the periphery of the sinking shaft through a support;
each jacking and correcting mechanism is lower than the target height L meters of the wellhead of the shaft to be sunk in the vertical direction; the total height of the sinking shaft is H meters, and the L/H is less than or equal to one third and more than or equal to one sixth;
each group of jacking and entanglement-coding mechanisms have the same structure and respectively comprise a hydraulic cylinder and jacking iron connected with an extension rod of the hydraulic cylinder, one surface, adjacent to the shaft to be sunk, of the jacking iron is a jacking surface, an embedded groove is formed in the jacking surface of the jacking iron, a polytetrafluoroethylene plate rubber support is embedded in the embedded groove, the polytetrafluoroethylene plate rubber support and the surface, matched with the shaft to be sunk, of the polytetrafluoroethylene plate rubber support are jacking surfaces of the polytetrafluoroethylene plate rubber support, the shape of the jacking surface of the polytetrafluoroethylene plate rubber support is matched with the outer surface of the shaft to be sunk, and the jacking surface of the polytetrafluoroethylene plate rubber support is used for being in sliding fit with the outer surface of the shaft to.
Each jacking and correcting mechanism also comprises a sizing block, and the sizing block is connected with the cylinder body of the hydraulic cylinder; the sizing blocks of the jacking and correcting mechanisms are connected together through an annular bracket.
A thin film pressure sensor is arranged between the PTFE sheet rubber support and the bottom of the caulking groove, a connecting seat is arranged on the side surface of the top iron, a distance sensor is arranged on the connecting seat, and the distance sensor faces the axial direction of the shaft to be sunk; the distance between the distance sensor and the axis of the shaft to be sunk is greater than the distance between the top iron top pressing surface and the axis of the shaft to be sunk;
the device also comprises an electric control device, and the distance sensor and the film pressure sensor are connected with the electric control device through connecting lines.
L/H equals two fifths.
The utility model discloses an open caisson overall process of sinking prevention alarm system that rectifies simple structure can realize in time rectifying in the overall process that the pit shaft sinks, and it is efficient to rectify a deviation, need not excavate and rectify a deviation, need not wait to rectify again after the great degree of skew, and not only convenient high-efficient consumes artifical less, and the cost is lower moreover.
The utility model discloses tetrafluoro plate rubber support has creatively utilized, can only carry out vertical setting as the tetrafluoro plate rubber support that the level bore later on, as the sunken sticising of pit shaft and sliding fit structure, created the precondition for the adjustment of rectifying a deviation of the in-process that sinks.
When the extension rod of the hydraulic cylinder extends inwards to jack and press the outer wall of the shaft to be sunk, the cylinder body of the hydraulic cylinder and the sizing block are bound to be subjected to outward reaction force, and the reaction force can cause the cylinder body of the hydraulic cylinder to displace.
The sizing blocks of the jacking and correcting mechanisms are connected together through the annular support, so that the reaction force applied to each hydraulic cylinder can be applied to the annular support through the sizing blocks and can be offset on the annular support, the stability of the jacking and correcting mechanisms is greatly enhanced, and the hydraulic cylinders are prevented from displacing during correction.
The distance between the distance sensor and the axis of the shaft to be sunk is greater than the distance between the top iron jacking surface and the axis of the shaft to be sunk, so that the shaft to be sunk cannot be contacted with the distance sensor (but is blocked by the top iron) necessarily even if the tetrafluoro plate rubber support is deformed under pressure in the process of jacking the shaft to be sunk by the hydraulic cylinder, and the use safety of the distance sensor is ensured.
If the L/H value is too large, the excavation depth is too deep when the space for installing the jacking pressure correcting mechanism is excavated, the engineering quantity is increased, and the construction efficiency is reduced. If the value of L/H is too small, the bottom end of the sinking shaft can be greatly deviated even if the deviation amount of the sinking shaft at the position of the top pressure correcting mechanism is small.
The L/H is less than or equal to one third and more than or equal to one sixth, so that the engineering quantity is not excessively increased, the bottom end of a sinking shaft is prevented from generating large deviation, and the deviation rectifying effect is ensured.
Drawings
Fig. 1 is a schematic view of the overhead structure of the deviation rectifying and preventing alarm system for the whole sinking process of the open caisson of the present invention;
FIG. 2 is a schematic view of the deviation rectifying and preventing alarm system in the whole sinking process of the open caisson;
FIG. 3 is an enlarged view at A in FIG. 1;
fig. 4 is an electrical control schematic of the present invention.
Detailed Description
As shown in fig. 1 to 4, the whole deviation rectifying and preventing alarm system for sinking of the open caisson of the present invention comprises top pressure correcting and editing mechanisms 2, wherein the top pressure correcting and editing mechanisms 2 are uniformly provided with more than three groups along the circumferential direction of the shaft 1 to be sunk, and each top pressure correcting and editing mechanism 2 is directly supported on the ground excavated at the periphery of the shaft 1 to be sunk or supported on the ground excavated at the periphery of the shaft 1 to be sunk through a bracket;
each jacking and correcting mechanism 2 is lower than the target height of the wellhead of the shaft 1 to be sunk (namely the height of the wellhead of the sinking shaft 1 when the shaft is sunk to a preset position) by L meters in the vertical direction; the total height of the sinking shaft 1 is H meters, and the L/H is less than or equal to one third and more than or equal to one sixth;
each group of jacking and correcting mechanisms 2 are identical in structure and comprise a hydraulic cylinder 3 and jacking iron 4 connected with an extension rod 14 of the hydraulic cylinder 3, one surface, close to the shaft 1 to be sunk, of the jacking iron 4 is a jacking surface, an embedded groove is formed in the jacking surface of the jacking iron 4, a polytetrafluoroethylene plate rubber support 5 is embedded in the embedded groove, the polytetrafluoroethylene plate rubber support 5 and the surface, matched with the shaft 1 to be sunk, of the polytetrafluoroethylene plate rubber support are jacking surfaces of the polytetrafluoroethylene plate rubber support 5, the shape of the jacking surface of the polytetrafluoroethylene plate rubber support 5 is matched with the outer surface of the shaft 1 to be sunk, and the jacking surface of the polytetrafluoroethylene plate rubber support 5 is used for being in sliding fit with the outer surface of the shaft 1 to be sunk. In this embodiment, the shaft 1 is a cylinder, so the top pressing surface of the tetrafluoro plate rubber support 5 in fig. 1 and 3 is a curved surface; when the shaft is in a square barrel structure, the top pressing surface of the PTFE sheet rubber support 5 is a plane.
Each jacking and correcting mechanism 2 also comprises a sizing block 6, and the sizing block 6 is connected with the cylinder body of the hydraulic cylinder 3; the sizing blocks 6 of the top pressure correcting and coding mechanism 2 are connected together through an annular bracket 7.
The ring support 7 may be made of i-steel.
The direction pointing to the axis of the shaft 1 to be sunk is taken as the inward direction, and the reverse direction is taken as the outward direction; when the extension rod 14 of the hydraulic cylinder 3 extends inward to press against the outer wall of the shaft 1 to be lowered, the cylinder body of the hydraulic cylinder 3 and the sizing block 6 are inevitably subjected to an outward reaction force, which may cause the cylinder body of the hydraulic cylinder 3 to be displaced.
The sizing blocks 6 of the jacking and correcting mechanisms 2 are connected together through the annular support 7, so that the reaction force received by each hydraulic cylinder 3 can be applied to the annular support 7 through the sizing blocks 6 and can be counteracted on the annular support 7, the stability of the jacking and correcting mechanisms 2 is greatly enhanced, and the hydraulic cylinders 3 are prevented from displacing during deviation correction.
A film pressure sensor 8 is arranged between the tetrafluoro plate rubber support 5 and the bottom of the caulking groove, a connecting seat 9 is arranged on the side face of the top iron 4, a distance sensor 10 is arranged on the connecting seat 9, and the distance sensor 10 faces the axial direction of the shaft 1 to be sunk; the distance between the distance sensor 10 and the axis of the shaft 1 to be sunk is greater than the distance between the top pressing surface of the top iron 4 and the axis of the shaft 1 to be sunk;
the device further comprises an electric control device 11, the distance sensor 10 and the film pressure sensor 8 are connected with the electric control device 11 through connecting lines, and the electric control device 11 is connected with a display screen 12.
In operation, the display 12 displays the detected values of the respective film pressure sensors 8 and the distance sensor 10.
Wherein, the connecting line of the film pressure sensor 8 needs to firstly penetrate out of the top iron 4 and then is connected with the electric control device 11. It is prior art to pass the connection lines through various force-bearing structures, and the specific path of the connection lines through the top iron 4 is not shown.
The distance between the distance sensor 10 and the axis of the shaft 1 to be sunk is greater than the distance between the top pressing surface of the top iron 4 and the axis of the shaft 1 to be sunk, so that the shaft 1 to be sunk cannot be contacted with the distance sensor 10 (but is blocked by the top iron 4) necessarily even if the tetrafluoro plate rubber support 5 is pressed and deformed in the process that the hydraulic cylinder 3 presses the shaft 1 to be sunk, and the use safety of the distance sensor 10 is ensured.
If the L/H value is too large, the excavation depth is too deep when the space for installing the jacking pressure correcting mechanism 2 is excavated, the engineering quantity is increased, and the construction efficiency is reduced. If the L/H value is too small, the bottom end of the sinking wellbore 1 may be greatly deviated even if the deviation amount of the sinking wellbore 1 at the top pressure correcting mechanism 2 is small.
The L/H is less than or equal to one third and more than or equal to one sixth, so that the engineering quantity is not excessively increased, the bottom end of the sinking shaft 1 is prevented from greatly deviating, and the deviation rectifying effect is ensured. A preferred value of L/H is two fifths.
Sinking the pit shaft 1 to be sunk; the compression pressures of the top pressing surface of each tetrafluoro plate rubber support 5 and the outer wall of the shaft 1, which are detected by each film pressure sensor 8, are respectively N1, N2, N3 and N4, and the units of N1, N2, N3 and N4 are all cattle or kilogram; the distances detected by the distance sensors 10 are respectively L1, L2, L3 and L4, and the units of L1, L2, L3 and L4 are all millimeters; the electric control device displays the values of N1, N2, N3 and N4 and L1, L2, L3 and L4 through a display screen, and constructors monitor the pressure values and the distance values in real time. When no deviation occurs, the pressure values tend to be consistent, and the distance values also tend to be consistent. When the shaft takes place to squint, pressure value and distance value take place the differentiation respectively, and some pressure values increase, and some pressure values reduce. Some of the distance values increase and some of the distance values decrease or do not change. When the constructor monitors that deviation occurs, the pressure can be applied to the shaft by controlling the extension rods of the hydraulic cylinders, and the deviation of the shaft is corrected.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (4)
1. Open caisson sinking overall process prevention alarm system of rectifying, its characterized in that: the top pressure correcting and editing mechanism is uniformly provided with more than three groups along the circumferential direction of a to-be-sunk shaft, and each top pressure correcting and editing mechanism is directly supported on the ground excavated at the periphery of the sunk shaft or supported on the ground excavated at the periphery of the sunk shaft through a support;
each jacking and correcting mechanism is lower than the target height L meters of the wellhead of the shaft to be sunk in the vertical direction; the total height of the sinking shaft is H meters, and the L/H is less than or equal to one third and more than or equal to one sixth;
each group of jacking and entanglement-coding mechanisms have the same structure and respectively comprise a hydraulic cylinder and jacking iron connected with an extension rod of the hydraulic cylinder, one surface, adjacent to the shaft to be sunk, of the jacking iron is a jacking surface, an embedded groove is formed in the jacking surface of the jacking iron, a polytetrafluoroethylene plate rubber support is embedded in the embedded groove, the polytetrafluoroethylene plate rubber support and the surface, matched with the shaft to be sunk, of the polytetrafluoroethylene plate rubber support are jacking surfaces of the polytetrafluoroethylene plate rubber support, the shape of the jacking surface of the polytetrafluoroethylene plate rubber support is matched with the outer surface of the shaft to be sunk, and the jacking surface of the polytetrafluoroethylene plate rubber support is used for being in sliding fit with the outer surface of the shaft to.
2. The open caisson sinking overall process deviation rectifying and preventing alarm system according to claim 1, wherein: each jacking and correcting mechanism also comprises a sizing block, and the sizing block is connected with the cylinder body of the hydraulic cylinder; the sizing blocks of the jacking and correcting mechanisms are connected together through an annular bracket.
3. The open caisson sinking overall process deviation rectifying and preventing alarm system according to claim 1, wherein: a thin film pressure sensor is arranged between the PTFE sheet rubber support and the bottom of the caulking groove, a connecting seat is arranged on the side surface of the top iron, a distance sensor is arranged on the connecting seat, and the distance sensor faces the axial direction of the shaft to be sunk; the distance between the distance sensor and the axis of the shaft to be sunk is greater than the distance between the top iron top pressing surface and the axis of the shaft to be sunk;
the device also comprises an electric control device, and the distance sensor and the film pressure sensor are connected with the electric control device through connecting lines.
4. The open caisson sinking overall process deviation rectifying and preventing alarm system according to any one of claims 1 to 3, wherein: L/H equals two fifths.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920529230.5U CN209958381U (en) | 2019-04-18 | 2019-04-18 | Open caisson sinking overall process prevention alarm system that rectifies |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920529230.5U CN209958381U (en) | 2019-04-18 | 2019-04-18 | Open caisson sinking overall process prevention alarm system that rectifies |
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| CN209958381U true CN209958381U (en) | 2020-01-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004963A (en) * | 2019-04-18 | 2019-07-12 | 郑州市市政工程总公司 | Well sinking overall process correction prevention alarm system and well sinking are rectified a deviation method |
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2019
- 2019-04-18 CN CN201920529230.5U patent/CN209958381U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004963A (en) * | 2019-04-18 | 2019-07-12 | 郑州市市政工程总公司 | Well sinking overall process correction prevention alarm system and well sinking are rectified a deviation method |
| CN110004963B (en) * | 2019-04-18 | 2024-02-06 | 郑州市市政工程总公司 | Deviation rectifying and preventing alarm system and deviation rectifying method for sinking process of sinking well |
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