CN206233223U - A kind of vacuum prepressing device of alternative expression pumping - Google Patents

Abstract

The utility model discloses the vacuum prepressing device of alternative expression pumping, including drain bar, bowknot, branch drain, two supervisors, jet pump and jet pump controller, each drain bar is connected by bowknot with corresponding branch drain, each branch drain is arranged side by side, if the branch drain of first row is 1, the branch drain of second row is 2, by that analogy, it is characterized in that, two supervisors are arranged side by side, one is the first supervisor, one is the second supervisor, the branch drain of odd-numbered is connected with the first supervisor, the branch drain of even-numbered is connected with the second supervisor, two supervisors are connected with a jet pump respectively, two jet pumps are connected with same jet pump controller.The utility model can prevent the too early silting of drain bar.

Description

A kind of vacuum prepressing device of alternative expression pumping

Technical field

The utility model is related to a kind of vacuum prepressing device of alternative expression pumping.

Background technology

With developing rapidly and global economic integration for Chinese national economy, substantial amounts of harbour is badly in need of in domestic coastal city And navigation channel, while with the nervous contradiction of expanding economy coastal area urban infrastructure construction land used, herein In the case of each city started the upsurge of one sea reclamation, the barged-in fill that waterway dredging is formed often is used as filling out sea to be made The ground in land.

The ground at most of artificial harbours is the deep hydraulic reclamation ultra-soft soil that dredging silt is formed, and its grain diameter is less than The sticky content of 0.005mm between 30%-50%, with high-moisture percentage, macrovoid ratio, low-intensity, high-compressibility, hyposmosis The features such as property and rheological characteristic.This reclaimed ground can not meet the primary condition required by engineering construction, and ultra-soft soil is certainly Consolidation under recast needs several years even longer times to complete.

Because the particularity of barged-in fill causes that the foundation reinforcement methods such as preloading and heavy-tamping method cannot all become silted up in dredging Used in the ground that mud is formed.Therefore, imperial family of Sweden geological institute scientist professor Kjellman proposes vacuum method Solve the problems, such as the reinforcing of hydraulic reclamation super soft ground.

The principle of traditional vacuum preloading method is that sand drain is set in saturated dredger soft soil, overlying sand bedding course and sealing film, is utilized Jet pump adds fluid negative-pressure power to hydraulic reclamation ultra-soft soil application, by the water displacement hull in the pressure official post ultra-soft soil pores inside and outside film Outward.Because validity of the vacuum method in terms of hydraulic reclamation super soft ground is processed makes it obtain extensively should in treatment of soft foundation With.

The traditional vacuum mud drainage blanket to be formed that draws water has a process by densification, and pore structure is unstable, easily occurs Silting.At present, the local uplift of soil phenomenon that vacuum method generally existing causes by the formation of the outer silting mud layer of drain bar, Uplift of soil partial radius are small, more closely knit, and in addition the other parts soil body is in sposh shape, bearing capacity polar region, in muck surface One layer of crust layer is formed, the intensity of the following soil body of crust layer is very low, it is virtually impossible to carries out related in-situ test, is not reaching to original This discharging consolidation purpose.If the formation of silting mud layer and the bad problem of the drainage effect that brings cannot solve to add The construction period of big vacuum method, discharging consolidation efficiency is reduced, bring unnecessary energy resource consumption and the waste of material.Cause How this, solve the problems, such as that silting mud layer has turned into a major technical barrier of vacuum preloading drainage construction.

The method for solving silting at present mainly concentrates two aspects, and one is, drain bar service behaviour is designed, such as root According to weak soil particulate component, filter membrane hole is designed, form the drain bar of silting blocking；Two are, air pressure splitting method or different gas injection Supercharging mode such as batch (-type) injecting gas boosting etc., can cause that the soil body at silting produces crack damage by air pressure, so as to solve Certainly silting problem.

The silt prevention method of multi-form differs from one another, and for silting blocking effect, both approaches have similar lacking Fall into and not enough, be mainly manifested in following two aspects：

(1) silting effect can be improved although being designed to filter membrane to a certain extent, can not be from root Silting is solved the problems, such as in sheet.

(2) air pressure splitting method is analyzed from principle, to a certain extent pre- drainable waterproofing plate silting, but engineering practice In, not can determine that carries out air pressure splitting in what depth bounds to soft soil foundation, silting blocking best results, at present still in Exploratory stage.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, is migrated with reference to the mechanism and soil particle of drain bar silting Rule, there is provided a kind of vacuum prepressing device of alternative expression pumping, to solve the problems, such as the too early silting of drain bar very well.The utility model Technical scheme it is as follows：

A kind of vacuum prepressing device of alternative expression pumping, including drain bar, bowknot, branch drain, two supervisors, jets Pump and jet pump controller, each drain bar are connected by bowknot with corresponding branch drain, and each branch drain is simultaneously arranged Put, if the branch drain of first row is 1, the branch drain of second row is 2, by that analogy, it is characterised in that two supervisors are side by side Arrangement, one is the first supervisor, and one is the second supervisor, and the branch drain of odd-numbered is connected with the first supervisor, even-numbered Branch drain be connected with the second supervisor, two supervisors are connected with a jet pump respectively, two jet pumps and same jet Pump controller is connected.

The utility model is in vacuum preloading soft soil foundation the characteristics of plastic draining board silting, there is provided a kind of vacuum Prepressing device, has the advantages that following two aspects with traditional technical scheme：

(1) this kind of vacuum prepressing device is used, simple control strategy is added, by odd number drain bar branch pipe and even number Drain bar branch pipe carries out alternative expression air-breathing, can postpone aggregation of the clay fine grained in drainage procedure, alleviates constant because applying Soil particle migration under vacuum degree condition causes the silting of displacement hull, postpones the silting time of drainage pipeline and the neighbouring soil body, can The too early silting of drainage channel caused by earth material is migrated during existing vacuum preloading is solved the problems, such as, with important application valency Value.

(2) equipment operation is simple, convenient and swift.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the vacuum prepressing device of alternative expression pumping of the present utility model.

Label declaration in figure：1 jet pump controller；2 even number branch drain jet pumps；3 odd number branch drain jet pumps；4 Odd number branch drain；5 even number branch drains；6 first supervisors；7 second supervisors；8 bowknots；9 drain bars；10 air injection pipes；11 is true Empty film

Specific embodiment

The utility model is illustrated with reference to the accompanying drawings and examples.

Referring to Fig. 1, the utility model discloses a kind of vacuum prepressing device of alternative expression pumping, including odd number branch drain 4th, even number branch drain 5, first supervisor 6, second supervisor 7, bowknot 8, drain bar 9, air injection pipe 10, vacuum diaphragm 11, wherein this In described odd and even number be to be defined from first row for being discharged to last row according to branch pipe.First on soft soil foundation upper berth Vacuum diaphragm 11, is connected with drain bar 9 and odd number branch drain 4 respectively in the bowknot 8 of odd row, odd number branch drain jet pump 3 the first supervisors 6 of control are evacuated.Equally, even rows bowknot 8 respectively with drain bar 9 and the phase of even number branch drain 5 Even, the supervisor 7 of the control of even rows branch pipe jet pump 2 second is evacuated.

First supervisor 6 is connected with odd row branch pipe jet pump 3；Second supervisor 7 is connected with even rows branch pipe jet pump 2；Penetrate Stream pump controller 1 is connected with even number branch drain jet pump 2 and odd row branch pipe jet pump 3 respectively.By to odd number drain bar Branch pipe and even number drain bar branch pipe carry out alternative expression air-breathing, can postpone aggregation of the clay fine grained in drainage procedure, alleviate The silting of displacement hull, postpones the silt of drainage pipeline and the neighbouring soil body caused by the soil particle under the conditions of applying constant vacuum is migrated The stifled time.

Claims (1)

1. the vacuum prepressing device that a kind of alternative expression is evacuated, including drain bar, bowknot, branch drain, two supervisors, jet pumps With jet pump controller, each drain bar is connected by bowknot and corresponding branch drain, and each branch drain is arranged side by side, If the branch drain of first row is 1, the branch drain of second row is 2, by that analogy, it is characterised in that two supervisors arrange side by side Row, one is the first supervisor, and one is the second supervisor, and the branch drain of odd-numbered is connected with the first supervisor, even-numbered Branch drain is connected with the second supervisor, and two supervisors are connected with a jet pump respectively, two jet pumps and same jet pump Controller is connected.