CN1047421C

CN1047421C - Jack propelling method for under water working of coffer

Info

Publication number: CN1047421C
Application number: CN 95100325
Authority: CN
Inventors: 陈川林
Original assignee: DADONG CONSTRUCTION Co Ltd
Current assignee: DADONG CONSTRUCTION Co Ltd
Priority date: 1995-02-17
Filing date: 1995-02-17
Publication date: 1999-12-15
Anticipated expiration: 2015-02-17
Also published as: CN1129272A

Abstract

The present invention relates to a jack propelling method for caisson launching work, which mainly comprises: a sand layer is laid on a sandy ground or the ground of a clay layer, a gravel layer or a laccolite terrain, and a caisson is manufactured on the sand layer; simultaneously, after the caisson is manufactured, the caisson is launched by a jack propelling method, so that the whole work is convenient, safe and rapid. The man-hour can be shortened, and the cost is reduced.

Description

Jack propelling method under water working of coffer

The present invention relates to a kind of jack propelling method under water working of coffer, this propelling method is made caisson on the ground on tool layer of sand surface, after caisson completes, can reduce the restrictions that extraneous factor caused such as landform and tidewater so simultaneously by jack with water under the caisson ejection.

Caisson utilization scope in making mole, shore protection or similar constructing is quite extensive, especially in the coastal area, indispensable building structure especially, but because the weight of caisson itself quite weighs (some weighs 2400 tons), thereby when making, be subjected to environmental limit, especially present launching caisson operational method is to the greatest extent imperfect in design, thereby causes the puzzlement in many operations, is analyzed as follows hereby:

At present more convenient in the production method of caisson is to utilize in the dock to make, after caisson completes, beginning is water filling in dock, when treating that caisson weight equals its suffered buoyancy (caisson is when the water surface floats), open sluice again, utilizing towboat to be dragged to the predetermined area lays, this kind operating type is a comparatively ideal operating type, because it does not have the problem of wanting the wind sheltering wave when making caisson, do not have down simultaneously the problem of water operation yet, but this kind mode is when making, can not need to be equipped with dock near the job location of caisson, if apart from the nearest dock in this job location in addition, then will inevitably bring difficulty to transportation at tens of kilometers (farther even).

Make the restriction of caisson on geographical position (distance) in the dock in order to overcome aforementioned the utilization, relevant manufacturer seeks the chiltern place that is fit to make caisson near the job location, the selected of its position must surpass the monthly average high-water mark again, avoid stormy waves to influence the caisson making to reach, so it is to take out sand separately to fill and lead up and drive piles on layer of sand, and on layer of sand, make caisson, again when its caisson completes and desires to descend the water operation, when it must wait for lake water climax, with sheet-pile extracting, sand is taken out in the removing that adds the place ahead sand pump dredger, and make caisson tilt because of weight, it is marine to cooperate towboat that caisson is dragged to again, is dragged to lay the place arrangement again; This kind preparation method must cooperate the condition of water operation down because of it, general clay layer, layer of gravel or laccolite seashore all can't use the method, cause its consumption worker quite consuming time in the searching of job location, its distance apart from the job location is also uncontrollable simultaneously, cause the burden on the construction cost again, it is in complete back and when desiring to descend the water operation of caisson again, must look the lake water situation again carries out, stormy waves is excessive if the climate condition of lake water arrival high water time is bad, then must incur loss through delay date of launch again, its influence to the engineering time is quite big, again when the weight of caisson is heavier, must descend the water operation with many towboats simultaneously even, because it is wayward during many towboat application of forces, the fracture of invar rope also once took place and the people's that injures incident, this also is the not most perfect problem that causes of existing launching caisson operational method.

Analyzed with regard to another angle again, when descending the water operation with towboat, must be subjected to the restriction of climate condition, if all there is bigger stormy waves a couple of days continuously, then will inevitably incur loss through delay the duration, in case simultaneously when towing deflection topple over then can't go again and pull out water, so its have a big risk, the manufacturing cost height, and during if accidentally caisson is swum like a tailor's goose, will inevitably destroy the navigation channel.

Main purpose of the present invention is: a kind of jack propelling method under water working of coffer is provided, it mainly can overcome the restriction on the place, also make simultaneously suitable place be difficult for seeking problem be resolved, and make overall operation more convenient rapidly, and can shorten man-hour, reduce cost.

Of the present invention time a purpose is: a kind of jack propelling method under water working of coffer is provided, with jack caisson is pushed in the water, can make its influence that is subjected to tidewater be reduced to minimum degree, help the grasp of engineering time.

A further object of the present invention is: a kind of jack propelling method under water working of coffer is provided, during following water operation, also can cooperates the long-armed type excavator to dig deeply when cooperating layer of sand geology, can lower the load of jack.

Another purpose of the present invention is: a kind of jack propelling method under water working of coffer is provided, during following water operation, cooperates the sand of taking out of sand pump dredger, the water operation is more smooth and easy down in order.

Another object of the present invention is to: a kind of jack propelling method under water working of coffer is provided, during following water operation, cooperate towing of towboat and with the ejection operation simultaneously of jack, make caisson finish down the water operation smoothly.

Technical program of the present invention lies in providing a kind of jack propelling method under water working of coffer, wherein, caisson after completing on the layer of sand, is pushed water down with jack with caisson.

When wherein pushing launching caisson, rear side can be banked up Wave-dissipating block as heavy burden on its seashore, and at the heavy burden thing of the stacked concrete block in the place ahead of Wave-dissipating block or other patterns, and jack is placed between concrete block and the caisson, can caisson be pushed to marine by jack

Jack pushes after caisson advances a segment distance at every turn again, make its oil return operation and shrink, then earlier the position of putting between this jack unit and caisson is overlayed the sandstone leveling, and with jack reach and make this unit near the caisson trailing edge, space between its jack unit rear side and the concrete block heavy burden thing that adds concrete block or other patterns is filled up then, be beneficial to the jack application of force, heavily cover such operation and caisson is pushed marine.

Aforesaid jack propelling method under water working of coffer, wherein, the position that makes caisson can be chosen on the sandy ground seashore or on clay layer, layer of gravel or the laccolite landform seashore face of land lays layer of sand thereon.

Aforesaid jack propelling method under water working of coffer, wherein, when the propelling movement caisson descends the water operation, can come caisson is pushed with two groups of above jack simultaneously, structure to caisson stress point place during again for fear of the jack application of force damages, so can settle a crossbeam or girder steel in the caisson side.

Aforesaid jack propelling method under water working of coffer wherein, after caisson completes, and when desiring to descend the water operation, can cooperate the long-armed type excavator to dig deeply, and can lower the propelling load of jack.

Aforesaid jack propelling method under water working of coffer wherein, after caisson completes, and when desiring to descend the water operation, also can cooperate the sand of taking out of sand pump dredger, and the water operation is more smooth and easy down in order.

Aforesaid jack propelling method under water working of coffer, wherein, after caisson completes, and when desiring to descend the water operation, also can cooperate towing of towboat and with the ejection operation simultaneously of jack, make caisson finish down the water operation smoothly.

The invention has the advantages that with jack 60 and push 10 times water operations of caisson, it need not to be limited in layer of sand 20 seashores, so can make the place selectivity of making caisson 10 higher, and can reduce the puzzlement of seeking the place, also can select suitable making place nearby, make its caisson 10 behind the following water of completing with the shortest apart from drag and drop, thereby promote efficiency of construction, and lower construction cost; Again its down water operation need not to take out sand with sand pump dredger, need not more to wait for that high water time drags with towboat drags into the mire, so it is subjected to the less-restrictive of time when operating, and can be beneficial to the grasp of engineering time; When carrying out 10 times water operations of caisson with method of the present invention in addition, more do not have the threat that disconnected rope is hurted sb.'s feelings, the safety when having improved overall operation.

Further specify specific structural features of the present utility model and purpose below in conjunction with accompanying drawing.

Fig. 1 is the view of caisson of the present invention when completing.

Fig. 2 is the caisson view after the sheet-pile extracting of the present invention.

When Fig. 3 was down water operation of the present invention, the mud layer before utilizing long-armed excavator with caisson dug dark schematic diagram.

When Fig. 4 is of the present invention time water operation, utilize jack to push the caisson schematic diagram.

Fig. 5 is after following water operation of the present invention is finished, and caisson is dragged to the schematic diagram of placement location with towboat.

When Fig. 6 is of the present invention time water operation, utilize jack to push the schematic top plan view of caisson.

See also shown in Figure 1, view when it completes for caisson of the present invention, wherein can see seashore that the present invention can be chosen in clay layer 25 carries out caisson 10 and makes, it is setting a sheet pile 30 to guarantee its steadiness in this place ahead, making place earlier before making as existing mode, then the present invention promptly lays one deck layer of sand 20 above this clay layer 25, and carries out the making of caisson 10 above layer of sand 20.

When caisson 10 completes and desires to descend the water operation, being about to its sheet pile 30 pulls out, after this sheet pile 30 is pulled out, the layer of sand 20 of caisson 10 front ends promptly can produce avalanche, and make this caisson 10 as shown in Figure 2, be a natural gradient that tilts, according to the front end of normal operating type caisson 10 can absorb water dark about 2 meters dark.

If the seashore side is sea water advanced enough dark, just can directly push caisson 10 marine with jack 60, but if clay layer 25 degree of depth deficiencies of its seashore side, then can be as shown in Figure 3, the long-armed excavator 40 that utilization is loaded on the platform boat 45 digs 25 mud layers of the clay layer before the caisson deeply, is beneficial to 10 times water operations of caisson.

Shown in Fig. 4, be under the present invention during the water operation, utilize jack 60 to push caisson 10 schematic diagrames, therefrom can clearly recognize, the present invention is when carrying out 10 times water operations of caisson, be that jack 60 by rear side pushes caisson 10 in the water, in figure, can see the present invention when pushing 10 times water of caisson, its rear side is that the Wave-dissipating block 50 banked up is as bearing a heavy burden, the stacked concrete block 55 (or heavy burden thing of other patterns) in the place ahead of Wave-dissipating block 50 then, so just jack 60 can be placed between concrete block 55 and the caisson 10, and push to caisson 10 marine by jack 60;

Under normal operating state, jack 60 pushes (fully under the state of Shen Zhanging) caisson 10 at every turn can advance 15～18 meters distance approximately, make its oil return operation then, and allow it shrink fully, and jack 60 reach made this unit near caisson 10 trailing edges in order to next time push operation, but before jack 60 units move, must earlier these jack 60 units be put the position and overlay the sandstone leveling, smoothness during with the maintenance operation, again after jack 60 units move forward to the location, the space that its jack 60 unit rear sides and concrete block are 55 also need add concrete block 55 or other heavy burden things are filled up, be beneficial to jack 60 application of forces, so the operation of heavily covering can push caisson 10 marine.

When caisson 10 pushes marine and after descending water (reaching draft) fully, can with towboat 80 caisson 10 be dragged to placement location as shown in Figure 5, and finish the following water operation of caisson 10.

See it by Fig. 6 again, it is during for down water operation of the present invention, utilize jack 60 to push the schematic top plan view of caisson 10, wherein as can be seen the present invention when pushing caissons 10 with jack 60, because the weight of caisson 10 itself is quite heavy, thereby can come caisson 10 is elected with two groups of jack 60 simultaneously, structure to caisson 10 stress point places during again for fear of jack 60 application of forces damages, so can settle a crossbeam or girder steel 70 in caisson 10 sides, thereby disperse 60 pairs of caissons 10 of jack applied concentrate strength on, reach the effect that pushes caisson 10.

Claims

1. jack propelling method under water working of coffer is characterized in that: caisson after completing on the layer of sand, is pushed water down with jack with caisson,

2 jack propelling method under water working of coffer according to claim 1 is characterized in that: the position that makes caisson can be chosen on the sandy ground seashore or on clay layer, layer of gravel or the laccolite landform seashore face of land lays layer of sand thereon.

3 jack propelling method under water working of coffer according to claim 1, it is characterized in that: when the propelling movement caisson descends the water operation, can come caisson is pushed with two groups of above jack simultaneously, structure to caisson stress point place during again for fear of the jack application of force damages, so can settle a crossbeam or girder steel in the caisson side, what thereby dispersion jack pair caisson was applied concentrates strength on, and reaches the effect that pushes caisson.

4 jack propelling method under water working of coffer according to claim 1 is characterized in that: after caisson completes, and when desiring to descend the water operation, can cooperate the long-armed type excavator to dig deeply, and can lower the propelling load of jack.

5 jack propelling method under water working of coffer according to claim 1 is characterized in that: after caisson completes, and when desiring to descend the water operation, also can cooperate the sand of taking out of sand pump dredger, the water operation is more smooth and easy down in order.

6 jack propelling method under water working of coffer according to claim 1, it is characterized in that: after caisson completes, and when desiring to descend the water operation, also can cooperate towing of towboat and with the ejection operation simultaneously of jack, make caisson finish down the water operation smoothly.