CN203891003U - Drainage channel up-pull device for vacuum pre-pressing solidification draining - Google Patents

Abstract

The utility model relates to a drainage channel up-pull device for vacuum pre-pressing solidification draining. The drainage channel up-pull device comprises two sets of hydraulic jacks (9 and 10), a base plate (15) and two top plates (11 and 12). Holes allowing a drainage channel to penetrate are formed in the base plate and the top plates respectively, when up-pull operation is carried out, the hydraulic jacks (9 and 10) are placed on the base plate (15), inner rubber rings (8) are embedded in the holes of the two top plates (11 and 12) respectively, and the inner diameter of the inner rubber rings (8) is matched with the outer diameter of the drainage channel. The two hydraulic jacks (9 and 10) are arranged on the two sides of the drainage channel, the hydraulic jack (9) abuts against the top plate (11), and the hydraulic jack (10) abuts against the top plate (12). The drainage channel up-pull device has the advantages of being simple in equipment, easy to construct and high in efficiency.

Description

A kind of for pulling device on the drainage channel of vacuum preconsolidation draining

Technical field

The utility model belongs to vacuum preconsolidation water discharge technology field, relates to a kind of vacuum preconsolidation drainage.

Background technology

Vacuum method is first to lay sand cushion on the soft foundation surface needing reinforcement, then bury vertical drainage pipeline (band drain) underground, make itself and atmospheric isolation with air-locked closing membrane again, film surrounding is buried in the earth, by the suction piping of burying underground in sand cushion, bleed with vacuum plant, make it form vacuum, the now pressure reduction seepage flow of the pore water in muddy soft soil because producing, water can be discharged from drainage pipe, because the water content of the soil body declines, the effective stress of ground also just increases thereupon, and it is fixed that mucky soil is known from experience generation.

At present, conventional band drain is made up of quilted plastic panel and filter membrane overcoat.Can obtain good consolidation draining effect although apply this conventional band drain in conventional vacuum preconsolidation drainage construction process, but through many experimental studies and engineering practice, it is very large that we find that high-moisture soft foundation carries out the horizontal movement of weak soil in conventional vacuum preconsolidation drainage procedure, be easy to cause the transverse horizontal flexural deformation of band drain, beautiful really wait and find by indoor model test as recorded, the large deformation of barged-in fill even fractures the band drain distortion that is distorted.This distortion very easily causes band drain water-permeable passage to block, and then causes the failure of consolidation draining.Once band drain is distorted to be out of shape and to fracture and just can not again utilizes, and causes the waste of material.Plastic draining board drainage performance after Wang Bo etc. finish Shenzhen Qian Wan foundation treatment engineering has carried out more comprehensive research, it is original 54.4% that the bending distortion of finding band drain after work causes longitudinal flowing water measuring to be reduced to, and illustrates that the water flowing performance of band drain also can reduce in vacuum.Meanwhile, in conventional vacuum preconsolidation drainage construction process, because the negative pressure value of band drain declines rapidly with the vertical drainage degree of depth, the consolidation draining effect of the orlop soil body is not very desirable.

The problem declining rapidly with the degree of depth in order to solve the band drain flexural deformation problem that occurs in conventional vacuum preconsolidation drainage construction process and negative pressure value, existing vacuum preloading drainage is improved, adopt the large rigidity pipe of irony as the passage of draining, whole drainage channel, comprise many top drainage pipes and a bottom drainage pipe, between adjacent top drainage pipe and between top drainage pipe and bottom drainage pipe, be mutually tightly connected, on the drainage pipe of bottom, offer the hole for drawing water.In the process of construction, this kind of drainage channel need to be deep into mud, first carry out the draining of bottom silt soil, substantially complete to fixed after a period of time, at this moment, vacuum pump stops vacuumizing, unload being connected of drainage channel and filter pipe, upwards tube drawing, lay down the top drainage pipe that is positioned at upper end of extracting, again connect drainage channel and filter pipe and carry out the discharging consolidation of a upper soil layer of next stage, then repeat above step after a period of time, thereby complete the discharging consolidation work of soft foundation.After soft foundation discharge fixing, on drainage channel, pull out is the problem that needs solve.

Utility model content

The purpose of this utility model is to provide a kind of simple and effective upper pulling device, will on the drainage pipe after discharging consolidation after a while, pull out, and moves making, to carry out the discharging consolidation of next section on the drainage pipe of foot.Pulling device on the drainage channel that the utility model provides, utilizes two groups of hydraulic jack to coordinate upper top, has equipment simple, constructs easily and the high feature of efficiency.The technical solution of the utility model is as follows:

A kind of for pulling device on the drainage channel of vacuum preconsolidation draining, will on the drainage channel that pulls out, comprise interconnective many drainage pipes, described upper pulling device comprises two groups of hydraulic jack (9, 10), a base plate (15) and two top boards (11, 12), base plate and top board all offer the hole that allows drainage pipe to pass, while pulling out on carrying out, two groups of hydraulic jack (9, 10) be placed on base plate (15), at two top boards (11, 12) hole place is embedded with respectively interior rubber ring (8), the internal diameter of interior rubber ring (8) and the external diameter of drainage pipe cooperatively interact, two groups of hydraulic jack (9, 10) be positioned at the both sides of described drainage channel, one group of hydraulic jack (9) is withstood a top board (11), another group hydraulic jack (10) is withstood another top board (12).

The upper pulling device that the utility model provides, in the time carrying out pulling out construction on drainage channel, the top board of getting two embedded rubber rings entangles drainage pipe, with these two top boards of the upper top of hydraulic jack coordination, utilize two groups of frictional force between rubber ring and the top drainage pipe of being emptied iron plate realize top drainage pipe on pull out process, there is equipment simple, construct easily and the high feature of efficiency.

Brief description of the drawings

Fig. 1 is the overall structure figure of longitudinal drainage passage of the present utility model.

Fig. 2 is the three-dimensional partial schematic diagram of top longitudinal drainage passage single pipe.

Fig. 3 adopts the schematic diagram that pulls out drainage channel in hydraulic jack.

Number in the figure explanation: 1 single drainage pipe; 2 draining pipes; 3 nonwoven geotechniques weave cotton cloth; 4 shoes; 5 outsourcing wire gauze; 6 screwed connections place add rubber pad; 7 screw threads; 8 rubber rings; 9 hydraulic jack; 10 hydraulic jack; 11 first iron plates (base plate); 12 second iron plates (top board); 13 sand cushions; 14 mud; 15 the 3rd iron plates (top board).

Detailed description of the invention

Below in conjunction with drawings and Examples, the utility model is described.

The utility model improves existing vacuum preloading water discharge technology, adopt the large rigidity pipe of irony as the passage of draining, but it only transmits negative pressure, does not carry out the draining of mud.Water in mud enters whole longitudinal drainage passage by that draining pipe of foot, and drainage channel is discharged soil body surface thus.When construction, first carry out the discharging consolidation (every layer of mud is 2 meters) of bottommost one deck mud, treat fixed completing, above pull out this drainage channel, carry out the discharging consolidation of upper strata mud, until all layer mud completes discharging consolidation.

Referring to Fig. 1, Fig. 2, the utility model will on the vacuum preconsolidation longitudinal drainage passage that pulls out, formed by many drainage pipes 1 and a draining pipe 2, drainage pipe 1 internal diameter is 8.5cm, external diameter is 9cm, thickness is 2.5mm.On drainage pipe 1, there is no hole, in mucky soil, can not draw water, can only transmit negative pressure.Every two drainage pipes, 1 use screw thread 7 connects, and screw thread 7 places all need to add rubber ring.Foot is draining pipe 2, and its internal diameter is 8cm, and external diameter is 8.5cm; The draining pipe 2 of foot also adopts screw thread 7 to be connected with the drainage pipe 1 on top.The making flow process of draining pipe 2 is: getting thickness is that 2.5mm internal diameter is that 8cm external diameter is the irony pipe of 8.5cm, punching on it, and hole diameter is 3mm.Overcoat nonwoven geotechnique weaves cotton cloth 3, geotechnique weave cotton cloth 3 skin wire gauze 5 wrap up tight, in case come off in work progress.Get single drainage pipe 1 and intercept top 20cm, this pipe is inserted into 10cm in the drainage pipe of 20cm, weld, now formed the special pipe that top has screw thread bottom to draw water.

Every drainage pipe 1 length is 2m, between every two drainage pipes 1, be connected to screwed connection 7, every top is male thread, bottom is interior screw thread, and ensure that any two drainage pipes can connect, in junction, every drainage pipe 1 top need add a rubbery loop 6, the effect of this rubbery loop 6 be ensure connect reliability, and ensure junction air tight, upper pull out process in screwed connection do not occur relaxing.Referring to Fig. 3, construction method is as follows:

(1) on mud, lay bed course at the scene, facilitate workman to construct, upper berth film again, when film requires to punch according to the spacing of drainage channel, make the drainage channel that the technical program will be used outside the venue, the waterproof large rigidity circular pipe 1 in this drainage channel top and bottom irony draining pipe 2 form.

(2) the waterproof large rigidity circular pipe 1 in top plays the effect of transmitting negative pressure and opposing horizontal shear, and it is segmentation, and every section is 2 meters, and each section is connected to screwed connection.

(3) waterproof top first paragraph large rigidity circular pipe 1 and bottom irony draining pipe 2 are connected to rear installation shoe 4, shoe is connected with bottom drainage pipe (2) close and firm, the vertical film place of punching that inserts is to the convenient height that connects next root pipeline, guarantee that drainage channel is vertical, then connecting pipe 1, the front end of shoe 4 is sharp.

(4) every pipeline 1 junction will add a rubber pad 6, can prevent like this gas leakage of pipeline junction.

(5) continue again intubate, until reach the designing requirement degree of depth.

(6) connecting pipe and filter pipe afterwards, uses vacuum pump to add negative pressure and carries out draining.

Take such scheme both can ensure that the negative pressure that keeps larger in band drain was (because waterproof pipe 1 rigidity in top is larger, negative pressure value in pipeline does not decay with the degree of depth as conventional band drain in the process of draining, so so just solved the problem that negative pressure that conventional vacuum preloading drainage occurs in work progress declines rapidly with the increase of draining depth), can ensure that again the horizontal movement that mud produces in drainage procedure can not make drainage channel produce larger horizontal curvature distortion.

In the process of construction, first carry out the draining of the 2 meters of silt soils in bottom, substantially complete to fixed after the regular hour.At this moment, vacuum pump stops vacuumizing, unload being connected of longitudinal drainage pipeline and filter pipe, upwards 2 meters of tube drawings, unclamp screw thread and lay down that root drainage pipe 1 of extracting, again connect drainage pipe and filter pipe and carry out the discharging consolidation of a upper soil layer of next stage, then repeat above step to certain number of days, thereby complete the discharging consolidation work of soft foundation.

The problem of gushing on the mud likely causing when pulling out drainage channel on solving, putting radius on the top at the film place of punching is that 50cm thickness is the iron plate (can be called base plate) 15 of 1cm.On the process of pulling out to adopt jack be to consider that the soil body vacuumizes can be in the soil body to produce very large negative pressure value, this negative pressure value can increase the frictional force between mucky soil and drainage pipe, this frictional force need larger uplift force could realize drainage pipe on pull out process.The implementation procedure of this uplift force is: get the iron plate that 1cm is thick (can be called top board) 11,12, empty this iron plate 11,12, hole place on the second iron plate 11 and the 3rd iron plate 12 is embedded with respectively interior rubber ring 8, the external diameter of the internal diameter of rubber ring 8 and top drainage pipe 1 cooperatively interacts, and rubber ring 8 need be fixed to iron plate 11,12 and empty place; Get two these iron plates 11,12 entangle drainage pipe 1, withstand respectively this two iron plates 11 with two groups of jack 9,10,12, on jack 9,10 in the process of top, two iron plates 11,12 meeting shapes are at a certain angle, now rubber ring 8 plays a role, and rubber ring 8 can form frictional force with drainage pipe 1, utilize this frictional force realize drainage pipe 1 on pull out (principle of the climbers used to electrician's pole-climbing is similar).Notice that the two groups of jack in left and right 9,10 need to coordinate upper top, in case drainage channel 1 tilts, then by jack 9,10 complete drainage channel 1 on pull out construction technology.

More than illustrate taking 2 meters as example, in practical application, can make 1 meter one section, or every segment length is selected as required in Practical Project.

Claims (2)

1. one kind for pulling device on the drainage channel of vacuum preconsolidation draining, will on the drainage channel that pulls out, comprise interconnective many drainage pipes, described upper pulling device comprises two groups of hydraulic jack (9, 10), a base plate (15) and two top boards (11, 12), it is characterized in that, base plate and top board all offer the hole that allows drainage pipe to pass, while pulling out on carrying out, two groups of hydraulic jack (9, 10) be placed on base plate (15), at two top boards (11, 12) hole place is embedded with respectively interior rubber ring (8), the internal diameter of interior rubber ring (8) and the external diameter of drainage pipe cooperatively interact, two groups of hydraulic jack (9,10) be positioned at the both sides of described drainage channel, one group of hydraulic jack (9) is withstood a top board (11), and another group hydraulic jack (10) is withstood another top board (12).

2. according to claim 1 described for pulling device on the drainage channel of vacuum preconsolidation draining, it is characterized in that, described drainage pipe comprises above top drainage pipe (1) and a bottom drainage pipe (2), between adjacent top drainage pipe (1) and between top drainage pipe (1) and bottom drainage pipe (2), be mutually tightly connected, on described bottom drainage pipe, offer the hole for drawing water.