CN102995650B - Method for precontrolling inclination of open caisson in grading and layer-by-layer manner - Google Patents
Method for precontrolling inclination of open caisson in grading and layer-by-layer manner Download PDFInfo
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- CN102995650B CN102995650B CN201210511373.6A CN201210511373A CN102995650B CN 102995650 B CN102995650 B CN 102995650B CN 201210511373 A CN201210511373 A CN 201210511373A CN 102995650 B CN102995650 B CN 102995650B
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Abstract
The invention provides a method for precontrolling inclination of an open caisson in a grading and layer-by-layer manner. The method comprises the following steps of: mounting multiple supporting piles in a pre-submerged foundation of the open caisson; prefabricating a first section of the open caisson, wherein a plane is constructed at the parts, corresponding to the multiple supporting piles, at a lower edge leg of the first section of the open caisson; implementing the first section of the open caisson until the bottom of the first section of the open caisson falls onto the multiple supporting piles, and levelling the first section of the open caisson; synchronously dismounting the supporting piles at a preset height, cutting earth and implementing the open caisson until the first section of the open caisson falls on the multiple supporting piles again, and levelling the open caisson; after the first open caisson is submerged for predetermined depth according to design requirements, continuously pouring a second section of the open caisson above the first section of the open caisson; and removing the supporting piles segment by segment, and continuously pouring predetermined N sections of the open caisson above the second section of the open caisson until the bottom end of the open caisson is submerged to a designed elevation at bottom. The top ends of the multiple supporting piles are located at a same elevation, so that each section of the open caisson is subjected to levelling by virtue of the multiple supporting piles, and the inclination of the open caisson is avoided.
Description
Technical field
The invention belongs to building building technology field, relate in particular to the method that successively classification pre-control open caisson tilts.
Background technology
Because of reasons such as the load asymmetric, open caisson periphery of the complexity of geological condition, excavation are different, open caisson, in sinking process, often occurs that open caisson tilts, and is difficult to correction, even affects normally carrying out and producing security incident of engineering.For the problem of well sinking run-off the straight, traditional method is the asymmetric excavation of employing, adopts the method for asymmetric preloading to rectify a deviation on open caisson top or outside open caisson, but is all after open caisson run-off the straight and the passive measure of taking.
The inventor once proposed Chinese invention patent for this problem and " prevented the pre-control method that open caisson tilts " (open day on August 12nd, 2009, publication number is CN101503879A), but the member more complicated that the method is used, brace summer and steel corbel etc. need to be set in well, and the inconvenience of cutting the earth, increase construction cost.
Summary of the invention
The technical problem to be solved in the present invention is: the method that provides successively classification pre-control open caisson that a kind of easy construction, cost are lower to tilt, the method can make the probability of open caisson run-off the straight greatly reduce.
The present invention for solving the problems of the technologies described above taked technical scheme is:
The method that successively classification pre-control open caisson tilts, is characterized in that, it comprises the following steps:
1) open caisson pre-sink ground in multiple supporting piles are set, the plurality of supporting pile is arranged in the circumferential projection that caisson wall center line forms;
2) prefabricated first paragraph open caisson, corresponding to described multiple supporting piles and by dropping on the position of described multiple supporting piles, is constructed into plane at the bottom of first paragraph open caisson sword pin, is beneficial to open caisson and can stably drops on described multiple supporting pile;
3) reach after designing requirement until described first paragraph open caisson concrete strength, start to cut the earth, first paragraph open caisson is carried out to open caisson, until drop on described multiple supporting pile leveling open caisson bottom first paragraph open caisson;
4) along first paragraph caisson wall below by the earthwork at described multiple supporting piles position excavation desired depth downwards, synchronously remove the supporting pile of predetermined altitude, continue to cut the earth, open caisson, until first paragraph open caisson drops on described multiple supporting pile again, leveling open caisson;
5), after first paragraph open caisson is by designing requirement sinking desired depth, continue in the above to build second segment open caisson;
6) continuous repeating step 4) and 5), supporting pile is removed piecemeal, and on second segment open caisson, continued to build the open caisson of predetermined N section, until open caisson bottom sinks down into bottom design absolute altitude.
In such scheme, described supporting pile is bored pile, static pressed pile, hammering or vibration precast prestressed concrete stake or hammering or vibration piling bar.
In such scheme, described multiple supporting piles uniformly-spaced evenly arrange, and the hoop spacing distance between every two adjacent supporting piles is 3m ~ 15m.
In such scheme, described multiple supporting piles are greater than the spacing at the position soft at soil in the spacing at the hard position of soil, and the hoop spacing distance between every two adjacent supporting piles is 3m ~ 15m.
In such scheme, digging the degree of depth under in described step 4) is 0.3 m ~ 3m.
In such scheme, it in described step 4), is the supporting pile of removing predetermined altitude by the method for cutting.
Beneficial effect of the present invention is: because multiple supporting piles are arranged in the circumferential projection that caisson wall center line forms; And the top of supporting pile is positioned at same absolute altitude, when each open caisson, open caisson all can drop on respectively on the supporting pile that top is positioned at same absolute altitude, therefore each open caisson has all carried out leveling by supporting pile, and the accumulative total of having avoided open caisson to tilt.And with respect to the patent before the inventor, structure of the present invention is simpler, flat slab capital construction in well, in well, shoveling is more convenient, cost is lower.
Brief description of the drawings
The process schematic diagram of the successively classification pre-control open caisson method of tilting that Fig. 1 to Fig. 8 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described, and certain following embodiment should not be construed as limitation of the present invention.
A kind of method that the present embodiment provides successively classification pre-control open caisson to tilt, it comprises the following steps:
The first step:
As depicted in figs. 1 and 2, open caisson pre-sink ground 5 in multiple supporting piles 1 are set, the plurality of supporting pile 1 is arranged in the circumferential projection 6 that caisson wall center line forms.The plurality of supporting pile 1 uniformly-spaced evenly arranges, and the hoop spacing distance between every two adjacent supporting piles 1 is 3 m ~ 15m.Be understandable that, the plurality of supporting pile also can arrange in unequal interval mode, is greater than the spacing at the position soft at soil in the spacing at the hard position of soil.
In the present embodiment, the quantity of supporting pile is eight, and it is not limited to eight in the present embodiment, can determine according to the diameter of open caisson and soil property situation.
This supporting pile 1 can be bored pile, static pressed pile, hammering or vibration precast prestressed concrete stake or piling bar.In the present embodiment, select castinplace pile, first adopt pore-forming equipment pore-forming, as boring, hammering pore-forming, hole making by vibration, static pressure pore-forming etc., then will in hole, install reinforcing cage, concreting.
Second step:
As shown in Figure 3, prefabricated first paragraph open caisson 3, corresponding to multiple supporting piles 1 and will drop on the position of multiple supporting piles 1, is constructed into plane 2 at the bottom of first paragraph open caisson 3 sword pin, is beneficial to open caisson and can stably drops on multiple supporting piles 1;
The 3rd step:
As shown in Figure 4 and Figure 5, reach after designing requirement until first paragraph open caisson concrete strength, start to cut the earth, first paragraph open caisson 3 is carried out to open caisson, until the bottom of first paragraph open caisson 3 is dropped on eight supporting piles 1 (as shown in Figure 5), because the top of eight supporting piles is positioned at same absolute altitude, therefore can leveling open caisson;
The 4th step:
As shown in Figure 6 and Figure 7, the earthwork of multiple supporting piles 1 position being excavated to desired depth downwards along first paragraph open caisson 3 borehole wall belows, as 0.3m ~ 3m, the synchronous supporting pile 1 of removing predetermined altitude, as the method that adopts cutting makes eight supporting piles 1 cut same length, then continue shoveling, open caisson, until first paragraph open caisson 3 drops on (as shown in Figure 7) on supporting pile 1, leveling open caisson again;
The 5th step:
As shown in Figure 8, after first paragraph open caisson 3 is by designing requirement sinking desired depth, continue in the above to build second segment open caisson 4.
The 6th step:
Repeat the 4th step and the 5th step, supporting pile is removed piecemeal, and on second segment open caisson 4, continued to build the open caisson of predetermined hop count N, until open caisson bottom sinks down into bottom design absolute altitude.
It should be noted that, those of ordinary skill in the art should be appreciated that and can modify or be equal to replacement technical scheme of the present invention, and do not depart from aim and the scope of technical solution of the present invention, and it all should be encompassed in the middle of claim scope of the present invention.
Claims (6)
1. the method that successively classification pre-control open caisson tilts, is characterized in that, it comprises the following steps:
1) open caisson pre-sink ground in multiple supporting piles are set, the plurality of supporting pile is arranged in the circumferential projection that caisson wall center line forms;
2) prefabricated first paragraph open caisson, corresponding to described multiple supporting piles and by dropping on the position of described multiple supporting piles, is constructed into plane at the bottom of first paragraph open caisson sword pin, is beneficial to open caisson and can stably drops on described multiple supporting pile;
3) reach after designing requirement until described first paragraph open caisson concrete strength, start to cut the earth, first paragraph open caisson is carried out to open caisson, until drop on described multiple supporting pile leveling open caisson bottom first paragraph open caisson;
4) along first paragraph caisson wall below by the earthwork at described multiple supporting piles position excavation desired depth downwards, synchronously remove the supporting pile of predetermined altitude, continue to cut the earth, open caisson, until first paragraph open caisson drops on described multiple supporting pile again, leveling open caisson;
5), after first paragraph open caisson is by designing requirement sinking desired depth, continue in the above to build second segment open caisson;
6) continuous repeating step 4) and 5), supporting pile is removed piecemeal, and on second segment open caisson, continued to build the open caisson of predetermined N section, until open caisson bottom sinks down into bottom design absolute altitude.
2. the method that successively classification pre-control open caisson as claimed in claim 1 tilts, is characterized in that, described supporting pile is bored pile, static pressed pile, hammering or vibration precast prestressed concrete stake or hammering or vibration piling bar.
3. the method that successively classification pre-control open caisson as claimed in claim 1 tilts, is characterized in that, described multiple supporting piles uniformly-spaced evenly arrange, and the hoop spacing distance between every two adjacent supporting piles is 3m ~ 15m.
4. the method that successively classification pre-control open caisson as claimed in claim 1 tilts, is characterized in that, described multiple supporting piles are greater than the spacing at the position soft at soil in the spacing at the hard position of soil, and the hoop spacing distance between every two adjacent supporting piles is 3m ~ 15m.
5. the method that successively classification pre-control open caisson as claimed in claim 1 tilts, is characterized in that, digging the degree of depth under in described step 4) is 0.3 m ~ 3m.
6. the method that successively classification pre-control open caisson as claimed in claim 1 tilts, is characterized in that, is the supporting pile of removing predetermined altitude by the method for cutting in described step 4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210511373.6A CN102995650B (en) | 2012-12-04 | 2012-12-04 | Method for precontrolling inclination of open caisson in grading and layer-by-layer manner |
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| CN201210511373.6A CN102995650B (en) | 2012-12-04 | 2012-12-04 | Method for precontrolling inclination of open caisson in grading and layer-by-layer manner |
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| CN102995650A CN102995650A (en) | 2013-03-27 |
| CN102995650B true CN102995650B (en) | 2014-11-12 |
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| CN105256819A (en) * | 2015-09-29 | 2016-01-20 | 中国一冶集团有限公司 | Improving method for open caisson sinking construction in geology of sludge layer |
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| JPH0468123A (en) * | 1990-07-09 | 1992-03-03 | Shimizu Corp | Method for constructing foundation of caisson |
| CN101503879B (en) * | 2009-03-10 | 2012-06-13 | 中国一冶集团有限公司 | Pre-control method for preventing inclination of sinking well |
| JP4942230B1 (en) * | 2010-11-29 | 2012-05-30 | 賢治 町筋 | Submersible method and equipment for submerged method |
| CN102587401B (en) * | 2012-03-26 | 2014-10-15 | 上海中信水务产业有限公司 | Sinking construction method for open caisson in geological sludge layer under saturated water condition |
| CN102635124B (en) * | 2012-04-23 | 2014-12-03 | 浙江省建工集团有限责任公司 | Construction method aiming to large open caisson in weak soil area |
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