CN114922215A - Underwater open caisson positioning device and method - Google Patents
Underwater open caisson positioning device and method Download PDFInfo
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- CN114922215A CN114922215A CN202210601958.0A CN202210601958A CN114922215A CN 114922215 A CN114922215 A CN 114922215A CN 202210601958 A CN202210601958 A CN 202210601958A CN 114922215 A CN114922215 A CN 114922215A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 8
- 230000036544 posture Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000007667 floating Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses an underwater open caisson positioning device and method, which relate to the technical field of bridge underwater open caisson foundation construction, and the device comprises a plurality of positioning mechanisms and a plurality of groups of jacks, wherein the positioning mechanisms are fixedly arranged at intervals on set positions on the periphery of a preset position so as to position the sinking position of an open caisson; and the plurality of groups of jacks correspond to the positioning mechanisms one by one, are arranged at the circumferential outer side of the open caisson at intervals, and can extend to abut against the positioning mechanisms when the open caisson sinks so as to adjust the sinking posture of the open caisson. The underwater open caisson positioning method comprises the following steps: injecting water into the open caisson to enable the open caisson to sink to the inner side range of the positioning mechanisms; measuring the deviation of the open caisson from a preset position, and adjusting the extension length of each group of jacks until the open caisson is accurately positioned above the preset position; and continuously injecting water into the open caisson to make the open caisson sink to a preset position. The problems that the open caisson is complex in positioning and low in precision, and occupies a channel during construction in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of bridge underwater open caisson foundation construction, in particular to an underwater open caisson positioning device and method.
Background
When a bridge is built on water, the bridge often encounters the difficult problems of deeper water depth, poorer soil quality of a covering layer, great scouring and the like, so that the bridge is not very beneficial to bridge construction, and the difficulty of foundation construction is also higher.
At present, when an underwater open caisson is positioned, a positioning system formed by structures such as a pull cable, an anchor pier/anchor pile and a gravity anchor is generally adopted for positioning construction, the traditional positioning mode comprises a plurality of steps such as side anchoring and throwing, anchor pier/anchor pile inserting and beating, tugboat auxiliary cable passing, rope head fixing, cable rope tensioning and the like in the construction process, the operation is complex, the equipment investment is large, the underwater open caisson is limited by complex hydrological conditions such as reciprocating flow and water depth flowing urgency, positioning operation is often required to be carried out at a proper time, and a large amount of time is consumed in the whole process.
In addition, the anchor ropes used in the traditional positioning method are of large deformation structures, and a plurality of anchor ropes and the open caisson form a hyperstatic structure together, so that the open caisson cannot be accurately positioned.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an underwater open caisson positioning device and method, and aims to solve the problems that open caisson positioning is complex and low in precision, and a channel is occupied during construction in the related art.
In order to achieve the purpose, the invention adopts the technical scheme that:
in one aspect, an underwater open caisson positioning device is provided, comprising: the positioning mechanisms are used for being fixedly arranged at set positions on the periphery of the preset position of the open caisson at intervals;
and the jacks correspond to the positioning mechanisms one by one, are arranged on the circumferential outer side of the open caisson at intervals, and can extend and abut against the positioning mechanisms when the open caisson sinks so as to adjust the sinking posture of the open caisson.
In some optional schemes, each positioning mechanism comprises two positioning piles which are vertically arranged, and a positioning plate is arranged on one side of each positioning pile, which is close to the open caisson.
In some optional schemes, the positioning plate is vertically provided with a guide groove, and the extending end of the jack can slide in the guide groove.
In some alternatives, the projecting end of the jack is in clearance fit with the guide slot.
In some optional schemes, two sets of jacks which are symmetrical in the vertical direction are arranged on each outer side wall of the open caisson, and each set of the jacks is respectively close to two ends of the outer side wall of the open caisson.
In some alternatives, each set of jacks includes two vertically spaced jacks.
In some alternatives, each set of the jacks is near the bottom of the caisson, and each of the jacks is perpendicular to the outer sidewall of the caisson.
In some optional schemes, the device further comprises a control device which is used for being arranged at the top of the open caisson so as to control the jack to extend and retract.
On the other hand, the invention also provides an underwater open caisson positioning method implemented by using the underwater open caisson positioning device, which comprises the following steps:
injecting water into the open caisson to enable the open caisson to sink to the inner side range of the plurality of positioning mechanisms;
measuring the deviation of the open caisson from a preset position, and adjusting the extension length of each group of jacks until the open caisson is accurately positioned above the preset position;
and continuously injecting water into the open caisson to make the open caisson sink to a preset position.
In some optional schemes, when the open caisson is precisely located above the preset position, all the jacks are extended into the guide grooves of the positioning mechanism and are in clearance fit with the guide grooves, so that the open caisson is sunk to the preset position along the guide grooves.
Compared with the prior art, the invention has the advantages that: the method is characterized in that a plurality of positioning piles are arranged on a peripheral river bed at preset positions of the open caisson, a plurality of groups of jacks corresponding to the positioning piles one to one are arranged on the outer side of the peripheral direction of the prefabricated open caisson at intervals, the jacks and the positioning piles are supported in the water injection sinking process of the open caisson, and the deviation between the open caisson and the preset positions is measured, so that the extension length of each jack is adjusted, the sinking posture of the open caisson is controlled, the open caisson can sink according to a preset path and a preset angle and accurately sinks to the preset positions.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a prefabricated open caisson in the underwater open caisson positioning device and method of the invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic diagram illustrating a position relationship between a positioning pile and a preset position in the underwater open caisson positioning device and method of the present invention;
FIG. 4 is a schematic diagram of a step one of the method for rapidly and accurately positioning the underwater open caisson according to the invention;
FIG. 5 is a schematic diagram of a second step of the method for quickly and accurately positioning the underwater open caisson according to the invention;
FIG. 6 is a schematic diagram of a third step of the method for quickly and accurately positioning the underwater open caisson according to the present invention;
fig. 7 is a schematic diagram of the fourth step of the method for quickly and accurately positioning the underwater open caisson according to the invention.
In the figure: 1. sinking a well; 11. a hollow partition wall; 2. a jack; 3. a positioning mechanism; 31. positioning the pile; 32. positioning a plate; 4. a control device; 5. and (4) presetting a position.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
On one hand, as shown in fig. 1 and fig. 2, the present application provides an underwater caisson positioning device, which includes a plurality of positioning mechanisms 3 and a plurality of sets of jacks 2, wherein the plurality of positioning mechanisms 3 are used to be fixedly disposed at intervals at a set position on the periphery of a preset position 5, so as to position a sinking position of the caisson 1; the multiple sets of jacks 2 correspond to the positioning mechanisms 3 one by one, are arranged on the circumferential outer side of the open caisson 1 at intervals, and can extend to abut against the positioning mechanisms 3 when the open caisson 1 sinks so as to adjust the sinking posture of the open caisson 1.
It can be understood that open caisson 1 is prefabricated open caisson, preset position 5 for the position that open caisson 1 needs to sink, on the peripheral riverbed of preset position 5, a plurality of positioning mechanism 3 are inserted at the interval of circumference, and be equipped with the multiunit jack 2 with positioning mechanism 3 one-to-one in the circumference outside of open caisson 1, when open caisson 1 sinks, every group jack 2 can extend respectively and support and hold on corresponding positioning mechanism 3, according to open caisson 1 and the deviation distance of preset position 5, push away the jack 2 and the positioning mechanism 3 that correspond the position, and thereby adjust the gesture of sinking of open caisson 1, make open caisson 1 sink to preset position 5 accurately.
It should be noted that the inserting and striking depth of the positioning mechanism 3 should meet the pushing force of the jack 2, and the top elevation of the positioning mechanism 3 should be lower than the bottom elevation of the open caisson 1 in the floating transportation process, so as to prevent the open caisson from interfering with the positioning mechanism 3 when floating transportation is performed to the position above the preset position 5.
In some embodiments, as shown in fig. 3, each positioning mechanism 3 includes two positioning piles 31 arranged vertically, a positioning plate 32 is arranged on one side of each positioning pile 31 close to the open caisson 1, and the jack 2 abuts against the positioning plate 32.
Further, the positioning plate 32 is vertically provided with a guide groove in which the protruding end of the jack 2 can slide.
It can be understood that when the sinking posture of the caisson 1 is adjusted by the jacks 2, each jack 2 can push against the corresponding positioning plate 32, at this time, the jacks 2 located in the same direction move relative to the corresponding positioning plates 32 due to the pushing action of the jacks 2 in the other direction, and when the caisson 1 is adjusted to be above the preset position 5, the extending ends of the jacks 2 are located in the corresponding guide grooves.
Preferably, the extending end of the jack 2 is in clearance fit with the guide groove.
It can be understood that, in the process that the open caisson 1 sinks to the preset position 5, the sinking postures of the open caisson 1 are adjusted by pushing the jacks 2 and the positioning plates 32 at different positions on the open caisson 1, after the sinking postures of the open caisson 1 are adjusted, the extending ends of each group of the jacks 2 extend into the guide grooves in the positioning plates 32, the extending ends of the jacks 2 are away from the bottoms of the guide grooves by a certain distance and are in clearance fit with the guide grooves, and the positioning mechanisms 3 play a role in guiding the sinking of the open caisson 1, so that the sinking state of the open caisson 1 is more stable, and the sinking influence of water flow on the open caisson is reduced.
In some embodiments, as shown in fig. 2, two sets of jacks 2 are symmetrically arranged on each outer side wall of the open caisson 1 along the vertical direction, and each set of the jacks 2 is respectively close to two ends of the outer side wall of the open caisson 1.
For guaranteeing that open caisson 1 sinks the in-process of gesture through jack 2 adjustment, the jacking force that each direction of open caisson 1 received is balanced, and the precision is higher during the adjustment, sets up two sets of jack 2 on the lateral wall of open caisson 1 each other symmetrically, and is located the both ends that are close to the open caisson lateral wall respectively.
In this example, the open caisson is a rectangular open caisson, two sets of jacks are arranged on four side walls of the open caisson and are symmetrical along the vertical direction, and the two sets of jacks are respectively close to the vertex angles of the rectangular open caisson, so that the sinking posture of the open caisson can be adjusted by using smaller jacking force when the jacks push the positioning mechanism.
Further, as shown in fig. 1, each set of jacks 2 includes two jacks 2 arranged at a vertical interval.
Here, considering that the open caisson is prone to incline due to the water flow in water, each set of jacks is arranged to include two vertically spaced jacks 2 to increase the contact area of each set of jacks with the positioning mechanism, so that the sinking posture of the open caisson is more stable, and thus, in this example, two horizontal rows of jacks 2 are arranged at intervals in the circumferential direction of the open caisson 1, and each row includes 8 jacks.
It can be understood that a plurality of hollow partition walls 11 arranged in an array are vertically arranged in the open caisson 1, and are used for injecting water to make the open caisson 1 sink.
In this example, the caisson is sunk by injecting water into the partition wall of the caisson, and in other embodiments, other manners for sinking the caisson can be adopted.
Make open caisson 1 sink through the water injection, the speed of sinking that can the accurate control open caisson, and easy operation is injected water into a plurality of array arrangement's hollow partition 11 in for open caisson 1 focus when sinking remains stable, because open caisson 1's top is higher than the surface of water, can be convenient for control water injection volume.
In some embodiments, each set of the jacks 2 is close to the bottom of the open caisson 1, each set of the jacks 2 is perpendicular to the outer side wall of the open caisson 1, so as to adjust the sinking posture of the open caisson 1 better, and the jacks 2 are arranged at positions close to the bottom of the open caisson 1, so that the height of the positioning mechanism 3 can be reduced, and interference with the positioning mechanism 3 in the process of floating the open caisson 1 to the preset position 5 can be avoided.
On the basis of the scheme, a control device 4 is further arranged at the top of the open caisson 1 to control the jack 2 to stretch.
In this example, two sets of jacks near the same top corner of the rectangular open caisson are controlled by one control device, and four control devices are arranged at the top of the open caisson.
On the other hand, the invention also provides an underwater open caisson positioning method, which is implemented by using the underwater open caisson positioning device and comprises the following steps:
as shown in fig. 4, the open caisson 1 is floated to above the predetermined position 5.
As shown in fig. 5, water is injected into the open caisson 1 to sink into the inside of the plurality of positioning mechanisms 3.
It should be noted that the setting position of the positioning mechanism 3 is around the preset position 5 where the open caisson 1 sinks, and the positioning mechanisms 3 are arranged at intervals, and the elevation of the positioning mechanism 3 is lower than the bottom elevation of the open caisson 1 in the floating process, so as to prevent the open caisson from interfering with the positioning mechanism 3 in the floating process. In this example, the caisson is floated over the inner extent of the positioning mechanism 3 using tugboats.
As shown in fig. 6, the deviation of the open caisson 1 from the predetermined position 5 is measured, and the extension length of each set of the jacks 2 is adjusted until the open caisson 1 is precisely located above the predetermined position 5.
It can be understood that when the open caisson 1 has not completely sunk to the river bed, the multiple sets of jacks 2 are abutted against the positioning mechanisms 3, and the water body buoyance to the open caisson 1 enables the relative position of the open caisson 1 to be temporarily fixed in the inner side range of the multiple positioning mechanisms 3, the specific direction of the open caisson 1 is measured and compared with the preset position 5, and the extension length of the jack 2 at the corresponding position is adjusted according to the deviation between the open caisson 1 and the preset position 5 until the open caisson 1 is accurately located above the preset position 5.
For example, when the open caisson 1 deviates to the left by a certain distance from the preset position, the support between the jacks on the front and rear side walls of the open caisson 1 and the positioning mechanism is released, the extension lengths of the jacks on the left and right side walls are adjusted, and so on, the support between the jacks on the left and right side walls of the open caisson 1 and the positioning mechanism is released, and the extension lengths of the jacks on the front and rear side walls of the open caisson 1 are adjusted until the open caisson 1 is located at the preset position.
As shown in fig. 7, water is continuously injected into the open caisson 1 to lower the open caisson 1 to a predetermined position 5.
It should be noted that, at this time, the jack 2 is not in complete contact with the positioning mechanism 3, and the extending end of the jack 2 is spaced from the positioning mechanism 3 by a certain distance so as to sink the open caisson 1, where the spaced distance between the jack 2 and the positioning mechanism 3 is within an allowable error range.
In some embodiments, when the open caisson 1 is precisely positioned above the predetermined position 5, all the jacks 2 are extended into the guide slots of the positioning mechanism 3 and are in clearance fit with the guide slots, so that the open caisson is lowered to the predetermined position 5 along the guide slots.
In this example, the positioning mechanism 3 includes two positioning piles 31, a positioning plate 32 is disposed on one side of the two positioning piles 31 close to the open caisson 1, a vertical guide groove is formed in the positioning plate 32, and the jack 2 is extended into the guide groove to be in clearance fit with the guide groove, it can be understood that the extended end of the jack 2 is spaced from the bottom of the guide groove.
Set up the guide way and make jack 2 when the position of location open caisson 1, can be more accurate, can understand that, the guide way plays the effect of certain location and spacing direction, when all jacks 2 all are located corresponding guide way promptly, explains that open caisson 1 is located the top of presetting position 5, and when open caisson 1 sinks, jack 2 slides in the guide way, further avoids rivers to strike the open caisson and makes the open caisson displacement, influences the location of open caisson. Compared with the prior art, the invention has the advantages that: the peripheral of the preset position of the open caisson which needs sinking is circumferentially provided with a plurality of positioning mechanisms at intervals, and the circumferential outer side of the open caisson is provided with a plurality of groups of jacks which are in one-to-one correspondence with the positioning mechanisms at intervals, so that the sinking posture of the open caisson is accurately adjusted through the jacking force between the jacks and the positioning mechanisms when the open caisson sinks, and the open caisson is positioned above the preset position, and the problems that in the prior art, the open caisson is positioned by adopting a positioning system consisting of structures such as a pull cable, an anchor block/an anchor pile, a gravity anchor and the like, so that the equipment investment is large, the consumed time is long, and a large area of water area is occupied for a long time are solved; a guide groove in the vertical direction is formed in the positioning plate of each positioning mechanism and is in clearance fit with the extending end of the jack, so that the jack is more accurately positioned when the sinking posture of the open caisson is adjusted, the sinking path of the open caisson is fixed, the influence of water flow on the sinking position of the open caisson is avoided, and the positioning precision of the open caisson is improved; two groups of jacks which are symmetrical along the vertical direction are arranged at the position, close to the bottom, of each side wall of the open caisson, and each group of jacks are respectively close to the top angle of the open caisson, so that the sinking posture of the open caisson can be conveniently adjusted; set up every group jack to two jacks that set up including vertical interval, can prevent effectively that the open caisson from inclining at the in-process that sinks.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An underwater open caisson positioning device, comprising:
the positioning mechanisms (3) are used for being fixedly arranged at preset positions on the periphery of the preset positions (5) of the open caisson (1) at intervals;
and the multiple groups of jacks (2) correspond to the positioning mechanisms (3) one by one and are used for being arranged outside the peripheral direction of the open caisson (1) at intervals and can extend to abut against the positioning mechanisms (3) when the open caisson (1) sinks so as to adjust the sinking posture of the open caisson (1).
2. The underwater caisson positioning device of claim 1, wherein:
every positioning mechanism (3) all includes spud (31) of two vertical settings, two spud (31) are close to one side of open caisson (1) is equipped with locating plate (32).
3. The underwater caisson positioning device of claim 2, wherein:
the positioning plate (32) is vertically provided with a guide groove, and the extending end of the jack (2) can slide in the guide groove.
4. The underwater caisson positioning device of claim 3, wherein:
and the extending end of the jack (2) is in clearance fit with the guide groove.
5. The underwater caisson positioning device of claim 1, wherein:
two sets of jacks (2) symmetrical in the vertical direction are arranged on each outer side wall of the open caisson (1), and each set of jacks (2) is close to two ends of the outer side wall of the open caisson (1) respectively.
6. The underwater caisson positioning device of claim 1, wherein:
every jack (2) of group all includes jack (2) that two vertical intervals set up.
7. The underwater caisson positioning device of claim 1, wherein:
each group of the jacks (2) is close to the bottom of the open caisson (1), and each jack (2) is perpendicular to the outer side wall of the open caisson (1).
8. The underwater caisson positioning device of claim 1, wherein: the control device (4) is arranged at the top of the open caisson (1) and used for controlling the jack (2) to stretch.
9. An underwater open caisson positioning method, which is implemented by using the underwater open caisson positioning device of claim 1, and comprises the following steps:
injecting water into the open caisson (1) to enable the open caisson to sink to the inner side range of the positioning mechanisms (3);
measuring the deviation between the open caisson (1) and a preset position (5), and adjusting the extension length of each group of jacks (2) until the open caisson (1) is accurately positioned above the preset position (5);
and continuously injecting water into the open caisson (1) to enable the open caisson (1) to sink to a preset position (5).
10. The method of claim 9, wherein:
when open caisson (1) accurate positioning in when predetermineeing position (5) top, will all jack (2) extend to in the guide way of positioning mechanism (3), and with guide way clearance fit, so that the open caisson sinks to along the guide way predetermineeing position (5).
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| CN202210601958.0A CN114922215A (en) | 2022-05-30 | 2022-05-30 | Underwater open caisson positioning device and method |
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