CN207079574U

CN207079574U - Marine enrockment area bored concrete pile spillage control device

Info

Publication number: CN207079574U
Application number: CN201721037727.2U
Authority: CN
Inventors: 武学礼; 袁书晓; 张伟; 林波
Original assignee: Xindi Energy Engineering Technology Co Ltd
Current assignee: Xindi Energy Engineering Technology Co Ltd
Priority date: 2017-08-18
Filing date: 2017-08-18
Publication date: 2018-03-09
Anticipated expiration: 2027-08-18

Abstract

A kind of marine enrockment area bored concrete pile spillage control device is the utility model is related to, the device includes：Small mud pit, big mud pit, the sieves in big mud pit being connected via pipeline and slush pump with small mud pit, the drilling rod hole that big mud pit enters pipeline and rig via mud is connected, and its medium and small mud pit is connected by pipeline with the perforate on the steel pile casting for the rig for being higher by construction time peak level certain distance above.The utility model reduces caused by the head differential pressure spillage at steel pile casting base opening and drift sand formation, reduces the pile foundation pore-forming time and ensure that the quality of pile using head difference inside and outside casing is reduced.

Description

Marine enrockment area bored concrete pile spillage control device

Technical field

It the utility model is related to a kind of marine enrockment area bored concrete pile spillage control device.

Background technology

At sea during the cast-in-situ bored pile of enrockment area, because design stake top absolute altitude differs larger (8 meters or so of the discrepancy in elevation) with sea level And pile foundation is in marine enrockment area, pile foundation steel pile casting can not buried depth it is oversize, casing coating is relatively thin, in pile foundation construction process Head difference is excessive inside and outside middle casing, the spillage easily at steel pile casting base opening and drift sand formation, cause slurry coat method proportion reduce, from Analysis, makes body refuse in hole not exclude normally, bottom hole sediment is blocked up, makes the pile measurement for pouring completion unqualified.Spillage and spillage Slurry coat method proportion is caused to reduce, isolation.

Utility model content

Based on above mentioned problem, inventor has made intensive studies, as a result find by be higher by construction time peak level with On steel pile casting on perforate, reduce hole in mud liquid level, so as to reduce head difference inside and outside casing, reduce caused by head differential pressure Spillage at steel pile casting base opening and drift sand formation, ensures the proportion and denseness of mud in hole, and then ensure that the quality of pile.

A purpose of the present utility model is to provide a kind of marine enrockment area bored concrete pile spillage control device, the device bag Include：Small mud pit, big mud pit, the sieves in big mud pit being connected via pipeline and slush pump with small mud pit, The drilling rod hole that big mud pit enters pipeline and rig via mud connects, and its medium and small mud pit is by pipeline and is higher by the construction time most At a certain distance from above high water mark (for example, peak level above 0.5-3m, more preferably preferably 1-2.5m, 1.2-2m, such as 1.5m Place) rig steel pile casting on perforate connection.

Further, the volume of small mud pit can be 8-100 cubic meters, preferably 20-80 cubic meters, the body of big mud pit Product can be 150-1000 cubic meters, preferably 500-800 cubic meters.

Further, mesh size used in step (2) filtering is 30-140 mesh, preferably 50-100 mesh.

Another purpose of the present utility model is to provide marine enrockment area bored concrete pile spillage control method and comprised the following steps： (1) first be higher by construction time peak level certain distance above (for example, peak level above 0.5-3m, preferably 1-2.5m, At more preferably 1.2-2m, such as 1.5m) rig steel pile casting on perforate, aperture can be 1-10cm, preferably 3-5cm, by steel In casing hole mud liquid level reduce (such as to construction time peak level above 0.5-3m, more preferably preferably 1-2.5m, 1.2-2m, Such as at 1.5m), to reduce head difference inside and outside casing, reduce mud pressure in hole；

(2) one small mud pit is set in tapping, the big mud pit that mud is extracted into construction platform with slush pump enters Row filtering, oversize feeds back to the drilling rod hole of rig again, to ensure the proportion of mud and denseness, enable in hole body refuse effectively with Mud is smoothly discharged.Screenings is most water and fine deposit, can be discharged.

This technology mainly reduces head difference inside and outside casing, reduces steel pile casting base opening and drift sand formation caused by head differential pressure Locate spillage, ensure the proportion and denseness of mud in hole, and then ensure that the quality of pile.

The technology mainly using head difference inside and outside casing is reduced, reduces steel pile casting base opening and stream caused by head differential pressure Spillage at sand bed, reduce the pile foundation pore-forming time and ensure that the quality of pile.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model sea enrockment area bored concrete pile spillage control device.

Description of reference numerals：

1：Rig；2：Steel pile casting；3：Filling pile construction platform；4：Perforate；5：Small mud pit；6：Mud return duct；7：Greatly Mud pit；8：Mud enters pipeline；9：Riprap layer；10：Water level.

Embodiment

The utility model is further illustrated below in conjunction with accompanying drawing, it should be understood, however, that the following description is only used for Exemplary purpose, do not form to any restrictions of the present utility model.

As shown in figure 1, rig 1 is arranged on the filling pile construction platform 3 of riprap layer 9, it is high on the steel pile casting 2 of rig 1 Go out construction time peak level certain distance above (for example, peak level above 0.5-3m, more preferably preferably 1-2.5m, 1.2- At 2m, such as 1.5m) perforate 4 is set, perforate 4 connects small mud pit 5, and small mud pit 5 is via mud return duct 6 and slush pump (not shown) is connected with big mud pit 7, in big mud pit set sieves (not shown), big mud pit 7 via Mud is connected into pipeline 8 with the drilling rod hole of rig 1.

Comprised the following steps using said apparatus sea enrockment area bored concrete pile spillage control method：

(1) construction time peak level certain distance above is being higher by first, for example, peak level above 0.5-3m, excellent 1-2.5m is selected, the steel pile casting of the rig more preferably at 1.2-2m, such as 1.5m opens 1-10cm, preferably 3-5cm diameters hole, by steel Mud liquid level is reduced for example to construction time peak level above 0.5-3m, more preferably preferably 1-2.5m, 1.2-2m, example in casing hole At 1.5m), to reduce head difference inside and outside casing, reduce mud pressure in hole；

(2) one small mud pit is set in tapping, the big mud pit that mud is extracted into construction platform with slush pump enters Row filtering, oversize feeds back to borer drill rod hole again, to ensure the proportion of mud and denseness, enables in hole body refuse effectively with mud Slurry smoothly discharge.

Embodiment 1

Using the device shown in Fig. 1, opened first in the steel pile casting for the rig being higher by construction time peak level above 1.5m 3cm diametric holes, mud liquid level in steel pile casting hole is reduced for example at construction time peak level above 1.5m, to reduce in casing Outer head difference, reduce mud pressure in hole；

(2) about 30 cubic metres of small mud pits of one volume are set in tapping, mud is extracted into construction platform with slush pump On the about 150 cubic metres big mud pit of volume filtered, filtering sieve the mesh of aperture 50, sieves set bottom, oversize The drilling rod hole of rig rig is fed back to again, to ensure the proportion of mud and denseness, enables body refuse in hole effectively smooth with mud Discharge.As a result, do not open up hole compared to steel pile casting and in fairlead mud the drilling of conventional bored concrete pile, steel pile casting base opening and drift sand Spillage significantly reduces at layer, and the pile foundation pore-forming time reduces about 1/3 and ensure that pile quality is excellent.

Embodiment 2

Using the device shown in Fig. 1, opened first in the steel pile casting for the rig being higher by construction time peak level above 1.8m 6cm diametric holes, mud liquid level in steel pile casting hole is reduced for example at construction time peak level above 1.5m, to reduce in casing Outer head difference, reduce mud pressure in hole；

(2) about 10 cubic metres of small mud pits of one volume are set in tapping, mud is extracted into construction platform with slush pump On the about 300 cubic metres big mud pit of volume carry out the mesh of aperture 30 of Filtration Filtration sieve, sieves setting bottom, oversize is again Borer drill rod hole is fed back to, to ensure the proportion of mud and denseness, body refuse in hole is effectively smoothly discharged with mud.Knot Fruit, does not open up hole compared to steel pile casting and the conventional bored concrete pile of mud drills in fairlead, is leaked at steel pile casting base opening and drift sand formation Slurry significantly reduces, and the pile foundation pore-forming time reduces about 1/3 and ensure that pile quality is excellent.

Claims

1. a kind of marine enrockment area bored concrete pile spillage control device, the device include：Small mud pit, via pipeline and slush pump with Big mud pit, the sieves in big mud pit of small mud pit connection, big mud pit enter pipeline and rig via mud The connection of drilling rod hole, its medium and small mud pit passes through the steel of pipeline and the rig for being higher by construction time peak level certain distance above Perforate connection on casing.

2. marine enrockment area bored concrete pile spillage control device according to claim 1, it is characterised in that small mud pit passes through Pipeline is connected with the perforate on the steel pile casting for the rig being higher by construction time peak level above 0.5-3m.

3. marine enrockment area bored concrete pile spillage control device according to claim 1, it is characterised in that small mud pit passes through Pipeline is connected with the perforate on the steel pile casting for the rig being higher by construction time peak level above 1.5m.

4. marine enrockment area bored concrete pile spillage control device according to claim 1, it is characterised in that the body of small mud pit Product is 8-100 cubic meters, and the volume of big mud pit is 150-1000 cubic meters.

5. marine enrockment area bored concrete pile spillage control device according to claim 1, it is characterised in that the screen cloth of sieves Aperture is 30-140 mesh.