CN211368780U - Soft soil area muddy water balance open caisson station counter-force and locking system - Google Patents
Soft soil area muddy water balance open caisson station counter-force and locking system Download PDFInfo
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- CN211368780U CN211368780U CN201921806102.7U CN201921806102U CN211368780U CN 211368780 U CN211368780 U CN 211368780U CN 201921806102 U CN201921806102 U CN 201921806102U CN 211368780 U CN211368780 U CN 211368780U
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Abstract
The utility model belongs to the technical field of underground engineering construction, in particular to a counterforce and locking system of a mud-water balance open caisson station in a soft soil area, which comprises a counterforce truss, a jack and a locking device; the reaction truss comprises a cross beam and two stand columns, and two ends of the cross beam are respectively fixed with the two stand columns; the bottoms of the two stand columns are fixed on the ground, and one sides, opposite to the two stand columns, of the two stand columns are provided with locking devices used for locking the open caisson section in a matched mode with the locking buttresses on the side walls of the open caisson section. The utility model provides a soft soil area muddy water balance open caisson station counter-force and locking system, through set up jack to exert sinking power, adjust the open caisson gesture to the open caisson structure below the counter-force truss; the locking devices are arranged on the two sides of the open caisson section, and the locking devices are matched with the locking buttresses on the side walls of the open caisson section to lock the open caisson section, so that the next open caisson section is assembled and poured or the current open caisson section is monitored, the construction speed of the open caisson is improved, and safety is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of the underground works construction, concretely relates to weak soil area muddy water balance open caisson station counter-force and locking system.
Background
When the traditional open caisson method is used for construction, the soil body in the open caisson is excavated while the open caisson wall is sunk until the open caisson wall is sunk to the designed elevation, and then all layers of structural slabs are poured from bottom to top. In the sinking process of the caisson wall, if the sinking speed is too fast or too slow, the sinking of the caisson wall is controlled by adjusting the frictional resistance of the side wall of the caisson wall (such as thixotropic slurry, air curtain and the like) or reducing the resistance of the lower part of the blade foot and the like.
Different from the construction of the traditional open caisson method, the open caisson station constructed by the muddy water balance method does not need to excavate soil inside the open caisson because the station bottom plate, the blade foot and the side wall are poured at first, and the soil below the station bottom plate is discharged by the muddy water control system and then integrally sinks in the driving station structure. However, when vertical assembly and pouring are required among open caisson sections of the station structure or the current open caisson section needs to stop sinking when meeting conditions, the station structure is difficult to lock and stop at any time; in addition, the station structure may encounter great water reaction force in the integral sinking process, which causes the station structure to sink at a slow speed, even in an ascending trend. Therefore, there is a need to design a system for balancing the counter force and locking of the open caisson station in the soft soil area by mud and water, which can lock the open caisson section at any time.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a weak soil area muddy water balance open caisson station counter-force and locking system can carry out the counter-force to the open caisson festival at any time and apply and lock at the open caisson festival sinking in-process, realizes the construction of next section open caisson festival, improves the construction speed of open caisson festival and ensures the station safety of sinking in-process.
In order to achieve the purpose, the technical scheme of the utility model is a counterforce and locking system of a mud water balance open caisson station in a soft soil area, which comprises a counterforce truss and a locking device; the reaction truss comprises a cross beam and two stand columns, and two ends of the cross beam are respectively fixed with the two stand columns; the bottoms of the two upright columns are fixed on the ground, and one sides, opposite to the two upright columns, of the two upright columns are respectively provided with a locking device which is used for locking the open caisson section in a manner of being matched with the locking buttress on the side wall of the open caisson section; and a reaction jack used for providing power for sinking of the open caisson section and adjusting the attitude of the open caisson is arranged between the bottom surface of the cross beam and the top surface of the open caisson section.
Furthermore, the reaction jacks are multiple, and the reaction jacks are arranged at intervals along the length direction of the cross beam.
Furthermore, the number of the counter-force trusses is multiple, and the counter-force trusses are arranged at intervals along the longitudinal direction of the station open caisson section; and two locking devices on each counter-force truss are respectively matched with corresponding locking buttresses on the walls on the two sides of the open caisson section.
As an embodiment, the locking device includes a locking chute, an upper locking jack and a lower locking jack, the locking chute is disposed on one side of the column facing the open caisson section, the upper locking jack and the lower locking jack are both disposed in the locking chute, and a locking buttress cooperating with the locking device is disposed between the upper locking jack and the lower locking jack.
Furthermore, the locking device further comprises a process auxiliary pad disposed in the locking chute, and the lower locking jack is disposed on the process auxiliary pad.
Furthermore, the process auxiliary pad is a steel gasket, a steel plate, a concrete precast slab, a concrete cast-in-place slab or a steel buttress.
As a second implementation manner, the locking device comprises a locking chute and electromagnetic steel plates, the locking chute is arranged on one side of the column facing the open caisson section, a locking buttress end steel plate is arranged at one end of the locking buttress, which is far away from the open caisson section side wall, and the electromagnetic steel plates matched with the locking buttress end steel plate are arranged on the side wall of the locking chute.
As a third embodiment, the locking device comprises a winch, a steel strand and a directional pulley; one end of the steel strand is connected with the side wall of the open caisson section, and the other end of the steel strand bypasses the directional pulley and is connected with the winch.
Furthermore, a plurality of reaction jacks are fixed on the cross beam and are arranged at intervals along the length direction of the cross beam.
Furthermore, a reaction frame foundation is arranged below the reaction truss, and the upright columns are arranged on the reaction frame foundation.
Still further, the reaction frame foundation is a bar foundation, a piled raft foundation, an independent foundation or a natural foundation.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model provides a weak soil area muddy water balance open caisson station counter-force and locking system locks the open caisson section through setting up locking device in the both sides of open caisson section to cooperate with the locking buttress on the open caisson section side wall through locking device, in order to realize locking the open caisson section at any time in the process of the open caisson section sinking, so that the next open caisson section is assembled, poured or is detected to the current open caisson section, improves the construction speed and the efficiency of construction of open caisson section;
(2) the utility model provides a soft soil area muddy water balance open caisson station counter-force and locking system can provide vertical counter-force for the sinking of the muddy water balance open caisson section through the counter-force jack arranged above the open caisson section so as to improve the sinking speed;
(3) the utility model provides a locking buttress matched with a locking device in a soft soil area mud-water balance open caisson station counterforce and locking system is arranged between an upper locking jack and a lower locking jack of the locking device, when an open caisson section normally descends, the upper locking jack and the lower locking jack follow in respective working process ranges, and the upper locking jack and the lower locking jack are not required to be pressurized; when the open caisson section needs to be locked, the lower locking jack is used for pressurizing, and supporting counter force is provided for the open caisson section; if the sinking well section encounters large water counter-force in the sinking process to cause that the descending speed is slow and even has an ascending trend, the upper locking jack is pressurized to provide the descending pressure for the sinking well section, and the descending speed of the sinking well section is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a counter-force and locking system of a mud-water balance open caisson station in a soft soil area provided by the embodiment of the utility model;
fig. 2 is a schematic view of one of the locking devices of the counter-force and locking system for the mud-water balance open caisson station in the soft soil area provided by the embodiment of the present invention;
fig. 3 is a schematic view of a second locking device of the soft soil area mud-water balance open caisson station counter-force and locking system provided in the embodiment of the present invention;
fig. 4 is a schematic view of a third locking device of the soft soil area mud-water balance open caisson station counter-force and locking system provided in the embodiment of the present invention;
in the figure: 1. the device comprises a reaction frame foundation, 2, an open caisson section, 3, a locking buttress, 301, a steel plate at the end of the locking buttress, 4, a reaction truss, 5, a reaction jack, 6, a locking device, 601, a locking chute, 602, an upper locking jack, 603, a lower locking jack, 604, a process auxiliary pad, 605, an electromagnetic steel plate, 606, a winch, 607, a steel strand, 608 and a directional pulley.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of 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, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1-2, an embodiment of the present invention provides a counterforce and locking system for mud-water balance open caisson station in soft soil area, including a counterforce truss 4 and a locking device 6; the reaction truss 4 comprises a cross beam and upright columns, and two ends of the cross beam are respectively fixed with the tops of the two upright columns; the bottoms of the two upright columns are fixed on the ground, and one opposite sides of the two upright columns are respectively provided with a locking device 6 which is used for locking the open caisson section 2 in a way of being matched with the locking buttress 3 on the side wall of the open caisson section 2; and a reaction jack 5 for providing power for sinking the open caisson section and adjusting the attitude of the open caisson is arranged between the bottom surface of the cross beam and the top surface of the open caisson section. When a station constructed by adopting a mud-water balance open caisson method is adopted, high-pressure water needs to be sprayed into soft soil below an open caisson section to form diluted mud water, then the diluted mud water is gradually discharged under the action of negative pressure, simultaneously, the open caisson section is gradually sunk to a control elevation, in the process, a reaction jack 5 is used for providing vertical power for sinking the open caisson section and adjusting the sinking posture of the open caisson section, the upper open caisson section needs to be sunk for a certain distance, then the next open caisson section is constructed on the upper open caisson section, at the moment, the upper open caisson section needs to be ensured to be static, in the embodiment, locking devices 6 are arranged on two sides of the open caisson section along the length direction, locking buttresses 3 are arranged on side walls on two sides of the open caisson section 2, the locking buttresses 3 are arranged in the locking devices 6, the locking devices 6 on two sides are matched with the locking buttresses 3 on two sides of the open caisson section 2 to lock the open caisson section from two sides of the open caisson section, the open caisson section 2 is kept stationary in the vertical direction, so that the open caisson section 2 can be locked at any time in the sinking process, the next open caisson section can be assembled and poured conveniently or the current open caisson section 2 can be detected conveniently, and the construction speed and the construction efficiency of the open caisson section 2 are improved; the method is suitable for the construction of underground stations and municipal foundation pit engineering in soft soil areas.
Furthermore, a plurality of reaction jacks 5 are arranged along the length direction of the cross beam at intervals. Before the open caisson section 2 sinks, arranging a plurality of reaction jacks 5 on the top surface of the open caisson section 2, and under normal conditions, the open caisson section slowly sinks to an appointed position by means of self gravity or under the control of water flow pressure, but when the open caisson section 2 encounters large water reaction force, the sinking speed is slow or the open caisson section has a rising trend, and vertical reaction force is provided for the sinking of the mud-water balance open caisson section 2 by applying force through the reaction jacks 5, so that the sinking rate of an open caisson station is accelerated, and the sinking posture of the open caisson structure is adjusted; the magnitude of the counterforce exerted by the counterforce jack 5 is adjusted according to the data monitored by the whole system and by combining the sinking rate and posture of each open caisson section of the station, the monitoring counterforce of the bottom plate and the like. As shown in fig. 3, 3 reaction jacks 5 are arranged above the caisson section 2 with 2 spans, and the 3 reaction jacks 5 are respectively arranged at the 2 side walls and the middle longitudinal beam of the caisson section 2, so that the sinking speed can be adjusted from multiple positions, and the caisson section 2 is prevented from being inclined.
Furthermore, a plurality of counter-force trusses 4 are arranged at intervals along the longitudinal direction of the station; a plurality of locking buttresses 3 are arranged on 2 side walls of each open caisson section 2 at intervals along the length direction of the open caisson section 2, two locking devices 6 on each counter-force truss 4 are respectively matched with two corresponding locking buttresses 3 on two side walls of the open caisson section 2, and the two sides of the open caisson section 2 are locked simultaneously to avoid the inclination of the open caisson section 2; the adjacent reaction trusses 4 are connected by longitudinal beams along the underground length direction, so that the overall stability of the reaction trusses 4 is improved. In this embodiment, the locking buttresses 3 are longitudinally arranged along the side wall of the open caisson section 2 and form a complete cast-in-place structure with the side wall of the open caisson section 2, and the specific distribution number of the reaction trusses 4 and the specific distribution number of the locking buttresses 3 are calculated and determined according to the weight of each open caisson section 2 and the longitudinal section length of the station. The locking buttress 3 can be in a rectangular structure, a trapezoidal structure, a wedge structure and the like, and the using function of the locking buttress can not be influenced by structures in any shapes. The locking buttress 3 is arranged at the top of each open caisson section 2, and before the locking buttress 3 sinks to the ground along with the open caisson section 2, the locking buttress 3 is cut off or chiseled off, and at least one locking buttress 3 on the side wall is ensured to be in the locking device 6 in the sinking process of each open caisson section.
As an embodiment, as shown in fig. 2, the locking device 6 includes a locking chute 601, an upper locking jack 602, and a lower locking jack 603, the locking chute 601 is disposed on a side of the column facing the open caisson section 2, the upper locking jack 602 and the lower locking jack 603 are both disposed in the locking chute 601, and the locking buttress 3 engaged with the locking device 6 is disposed between the upper locking jack 602 and the lower locking jack 603. When the open caisson section 2 is in the normal descending process, the upper locking jack 602 and the lower locking jack 603 follow the open caisson section in the respective working process range, the upper locking jack 602 and the lower locking jack 603 are not required to be pressurized, and the pressurization is only carried out when the open caisson section 2 is not required to sink, namely in a non-working state; specifically, when the open caisson section 2 needs to be locked, the lower locking jack 603 is used for pressurizing to provide a supporting counter force for the open caisson section 2; if the sinking well section 2 encounters a large water reaction force in the sinking process to cause a slow descending speed and even has an ascending trend, the upper locking jack 602 is pressurized to provide a downward pressure to the sinking well section 2, so that the descending speed of the sinking well section 2 is increased. The number of the upper locking jacks 602 and the lower locking jacks 603 is determined according to the magnitude of the required locking force.
Further, the locking device 6 further includes a process auxiliary pad 604, the process auxiliary pad 604 is disposed in the locking chute 601, and the lower locking jack 603 is disposed on the process auxiliary pad 604. The upper locking jack 602 and the lower locking jack 603 normally work within a process range, and when the upper locking jack 602 and the lower locking jack 603 exceed the working process, a process auxiliary pad 604 can be added at the bottom of the lower locking jack 603 to fill a gap between the jack and a structure, so as to increase the length of the working process of the jack, as shown in fig. 2, the process auxiliary pad 604 can have multiple layers, and the number of the layers of the specifically laid process auxiliary pad 604 can be selected according to needs; the process auxiliary pad 604 may be a steel pad, a steel plate, a concrete precast slab, a concrete cast-in-place slab, or a steel buttress, and is specifically selected according to the need.
As a second embodiment, as shown in fig. 3, the locking device 6 includes a locking chute 601 and an electromagnetic steel plate 605, the locking chute 601 is disposed on one side of the column facing the open caisson 2, one end of the locking buttress 3 facing away from the side wall of the open caisson 2 is provided with a locking buttress end steel plate 301, and the side wall of the locking chute 601 is provided with an electromagnetic steel plate 605 matching with the locking buttress end steel plate 301. In the normal descending process of the open caisson section 2, the locking buttress end steel plate 301 moves from top to bottom in the locking sliding groove 601 without electrifying the electromagnetic steel plate 605; when the open caisson section 2 needs to be locked, the electromagnetic steel plate 605 is electrified to generate a magnetic field to adsorb and fix the locking buttress end steel plate 301 on the electromagnetic steel plate 605, so that a supporting force is provided for the open caisson section 2.
As a third embodiment, as shown in fig. 4, the locking device 6 includes a winch 606, a steel strand 607, and a directional pulley 608; one end of the steel strand 607 is connected with the side wall of the open caisson section, and the other end is connected with the winch 606 after passing around the directional pulley 608. In the normal descending process of the open caisson section 2, the steel stranded wire 607 wound on the open caisson section 2 is gradually released by the winch 606, so that the open caisson section 2 gradually sinks under the action of gravity; when the open caisson section 2 needs to be static, the winch 606 stops releasing the steel strand 607, and the steel strand 607 provides pulling force for the open caisson section 2, so that the open caisson section 2 stops sinking.
In the embodiment, the reaction frame foundation 1 is arranged below the reaction truss 4, and the upright columns are arranged on the reaction frame foundation 1, so that the foundation has enough bearing capacity to ensure the stability of the open caisson section 2 after locking; furthermore, the reaction frame foundation 1 may be a bar foundation, a piled raft foundation, an independent foundation or a natural foundation, and the concrete form determines which type the reaction frame foundation 1 adopts according to the magnitude of the reaction force, wherein the bar foundation, the piled raft foundation and the independent foundation can all be reinforced concrete structures. In this embodiment, the upright is a steel frame or a reinforced concrete structure, and forms a door type truss with the beam, and the size of the reaction truss 4 is determined according to the station scale and the reaction force required for sinking.
The counter-force and locking system in the embodiment is connected to the station automatic control system, and the counter-force of each counter-force jack in the locking system are controlled through various information indexes fed back in the automatic control system, such as sinking speed, sinking pressure and the like, so that vertical power is provided for sinking of the open caisson section and the sinking posture of the open caisson section is adjusted.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a weak soil area muddy water balance open caisson station counter-force and locking system which characterized in that: comprises a counterforce truss and a locking device; the reaction truss comprises a cross beam and two stand columns, and two ends of the cross beam are respectively fixed with the two stand columns; the bottoms of the two upright columns are fixed on the ground, and one sides, opposite to the two upright columns, of the two upright columns are respectively provided with a locking device which is used for locking the open caisson section in a manner of being matched with the locking buttress on the side wall of the open caisson section; and a reaction jack used for providing power for sinking of the open caisson section and adjusting the attitude of the open caisson is arranged between the bottom surface of the cross beam and the top surface of the open caisson section.
2. The soft soil area mud-water balance open caisson station counter-force and locking system of claim 1, wherein: the reaction jacks are arranged in a plurality of numbers, and the reaction jacks are arranged at intervals along the length direction of the cross beam.
3. The soft soil area mud-water balance open caisson station counter-force and locking system of claim 1, wherein: the reaction trusses are arranged at intervals along the longitudinal direction of the open caisson section; and two locking devices on each counter-force truss are respectively matched with corresponding locking buttresses on the walls on the two sides of the open caisson section.
4. The soft soil area muddy water balance open caisson station counter-force and locking system of claim 1 or 3, wherein: the locking device comprises a locking sliding groove, an upper locking jack and a lower locking jack, the locking sliding groove is formed in one side, facing the open caisson section, of the stand column, the upper locking jack and the lower locking jack are arranged in the locking sliding groove, and a locking buttress matched with the locking device is arranged between the upper locking jack and the lower locking jack.
5. The soft soil area mud-water balance open caisson station counter-force and locking system of claim 4, wherein: the locking device further comprises a process auxiliary pad arranged in the locking chute, and the lower locking jack is arranged on the process auxiliary pad.
6. The soft soil area mud-water balance open caisson station counter-force and locking system of claim 5, wherein: the process auxiliary pad is a steel gasket, a steel plate, a concrete precast slab, a concrete cast-in-place slab or a steel buttress.
7. The soft soil area muddy water balance open caisson station counter-force and locking system of claim 1 or 3, wherein: the locking device comprises a locking sliding groove and an electromagnetic steel plate, the locking sliding groove is arranged on one side, facing the open caisson section, of the stand column, a locking buttress end steel plate is arranged at one end, deviating from the open caisson section side wall, of the locking buttress, and the electromagnetic steel plate matched with the locking buttress end steel plate is arranged on the side wall of the locking sliding groove.
8. The soft soil area muddy water balance open caisson station counter-force and locking system of claim 1 or 3, wherein: the locking device comprises a winch, a steel strand and a directional pulley; one end of the steel strand is connected with the side wall of the open caisson section, and the other end of the steel strand bypasses the directional pulley and is connected with the winch.
9. The soft soil area mud-water balance open caisson station counter-force and locking system of claim 1, wherein: a reaction frame foundation is arranged below the reaction truss, and the stand column is arranged on the reaction frame foundation.
10. The soft soil area mud-water balance open caisson station counter-force and locking system of claim 9, wherein: the reaction frame foundation is a strip foundation, a piled raft foundation, an independent foundation or a natural foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921806102.7U CN211368780U (en) | 2019-10-25 | 2019-10-25 | Soft soil area muddy water balance open caisson station counter-force and locking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921806102.7U CN211368780U (en) | 2019-10-25 | 2019-10-25 | Soft soil area muddy water balance open caisson station counter-force and locking system |
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| CN211368780U true CN211368780U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921806102.7U Active CN211368780U (en) | 2019-10-25 | 2019-10-25 | Soft soil area muddy water balance open caisson station counter-force and locking system |
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| CN (1) | CN211368780U (en) |
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