CN1141991A

CN1141991A - Stereosewering compacting-method for soft foundation

Info

Publication number: CN1141991A
Application number: CN 96101246
Authority: CN
Inventors: 孙五奇
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-14
Filing date: 1996-02-14
Publication date: 1997-02-05

Abstract

The invention relates to a construction method for dredging and solidifying original-state-slurry and sludge. On the basis of vaccum prepressing tech., the device thereof comprises a primary water-filtering tube, a water-guiding tube, water-collecting tubes of various stage which are connected with a vaccum water-discharge device, a rhizoidally arranged system fitted with a gas-water valve, a primary water-filtering tube is set in the soft base and the water collecting tube, the control valve and the vaccum water-discharge device are set at the outside of the soft base. Advantage: stereo dredging and solidifying, high efficiency, short period, low cost, fault controllable and capable of treating various soft base.

Description

Stereosewering compacting-method for soft foundation

What the present invention relates to is to be specially adapted to original state mud, mud, and hydraulic reclamation epeirogenetic or other similar applications make its dredging strengthening, construct a kind of job practices of foundation engineering.

To original state mud, mud, the various soft foundations of blowing-filling sludge epeirogenetic or other similar applications, for making its dredging strengthening, constructing the job practices of handpan engineering, use the comparatively general vacuum method that has at present, it is to build the drainage sand drain or squeeze into drainage plastics sheet pile, formation screening system in soft base, form soft base and be closed the zone, the vaccum drainage means that constitutes with vacuum pump, water pump and moisture trap to soft base bleed, draining, realize dredging strengthening.But it must make the top layer of soft base reach certain supporting capacity, for this reason, normally leans on long-time air-dry soft base table layer or takes alternate manner to handle, and could squeeze into plastics sheet pile, formation system with machinery thereon then.Its construction technology complexity, the conditional request harshness, the cycle is long, expense is high, is difficult to adapt to the needs of actual engineering.

In CN1020938C, disclose a kind of technique of soft soil foundation treatment that utilizes soft base has been carried out quick drainage consolidation method.It is cofferdam before hydraulic reclamation, and the tail end of the pre-buried gravity flow filter pipe net in the face of land in the weir, pipe network constructs the sealing collecting well, and the water, the gas that adopt vaccum drainage means will seal in the collecting well are again discharged outside the well.The gravity flow filter pipe net mainly falls by interconnecting, have certain longitudinal gradient--and the secondary pipeline and the first-level pipeline network that can flow automatically are formed, and the first-level pipeline network that is arranged in parallel is positioned at the top of secondary pipeline and evenly distributes along its total length.The deficiencies in the prior art part mainly is: promptly powerless if the face of land becomes silted up soft or then can't construct in water to original state mud, mud and so on ground, significant limitation is arranged in the use; The individual layer dredging strengthening, effect is not good enough; Be again except that vaccum drainage means, other pipe network system is to be imbedded in soft basic bottom entirely, in case leak air, leak the mud accident, easy-to-search accident point not, even if can find, also be difficult to effectively handle, though be the local cracking of the local gas leakage that occurs, leakage mud or drainage, but can make whole system out of control, can't make pressure, work on.Have said method construction technology complexity, conditional request harshness equally, long construction period, expense height are difficult to adapt to the drawback of actual requirement of engineering.

The objective of the invention is to avoid weak point of the prior art, and provide a kind of technology simple, convenient and swift, the cycle is short, cost is low, and dredging strengthening method controlled, that can adapt to various soft bases.

Can take following technical scheme to realize purpose.Stereosewering compacting-method for soft foundation, on the basis of technique of soft soil foundation treatment, promptly it also needs in soft base screening system to be set, and forms soft base and is closed the zone, the vaccum drainage means that constitutes with vacuum pump, water pump and moisture trap to soft base bleed, draining, realize dredging strengthening.But its filter pipe net is by the one-level filter pipe, and aqueduct, headers at different levels, water header and vaccum drainage means connect and compose successively, concentrate the system that is the arrangement of tree root shape step by step, and the air water by-pass valve control is housed between header; The one-level filter pipe places soft foundation, and headers at different levels, water header, by-pass valve control and vaccum drainage means all are arranged on the outside of soft foundation.

In conjunction with the accompanying drawings, embodiment is described in further detail the content of the technical program.

Fig. 1 is a kind of schematic diagram that the Stereosewering compacting-method for soft foundation filter pipe net is parallel, mode is laid in layering;

Fig. 2 be the Stereosewering compacting-method for soft foundation filter pipe net parallel, vertically with intersect a kind of schematic diagram of the comprehensive laying mode that combines;

Fig. 3 is a kind of schematic diagram of the fixing suspention of Stereosewering compacting-method for soft foundation filter pipe net drag-line laying mode.

Fig. 4 is parallel and vertical combines and header at different levels, water header, by-pass valve control and vaccum drainage means all are arranged on the vertical view of a kind of mode on dike low bank between fields or the carriage of Stereosewering compacting-method for soft foundation filter pipe net.

Stereosewering compacting-method for soft foundation, the one-level filter pipe 1 in the filter pipe net is in order to the filtering silt particle, receives the member of water in the soft foundation, gas, and it can adopt different shape, perforated pipe spare to constitute, and is advisable with disposable member.The one-level filter pipe is connected with header by aqueduct 2, that is to say, the part of aqueduct is in the soft base, another part is in the outside of soft base; As long as the one-level filter pipe is positioned at certain degree of depth place in soft base, its top sealing better, it is fixed to adopt technique of soft soil foundation treatment can guarantee that fully soft base carries out drainage from bottom to top, effectively; Last more routinely or the confining bed on the soft basic top of otherwise processed, its drainage is solidified; And in the native system, the position of one-level filter pipe in soft base then can make things convenient for, control quickly and easily in conjunction with alternate manner by aqueduct near the ground the soft base, dike low bank between fields or pedestal; Like this, just can not be subjected to the restriction of the soft foundation condition that original state mud, mud, swamp land or other inconvenience enters, promptly it can adapt to the construction of various soft basic situations.As for mode, the method that the one-level filter pipe is arranged in soft foundation, arranged, fixes, be to enter pre-buried in the construction area, setting, still be outside soft base region, otherwise be provided with, lay; It is fixing to be that flat formation is fixed, laid according to landform, still three-dimensional, set up installation; All can be according to the occasion of using, concrete geology, landforms state, environment, condition, the actual use need and may be waited factor, takes the circumstances into consideration to set.Aqueduct 2, header at different levels and water header 5 adopt intensity, the various steel of better rigidity, iron pipe to be advisable, and they can have enough to meet the need use, reduce cost.The level of header time can be according to the concrete condition setting of engineering, and operated by rotary motion secondary header 3, three grades of 4, two levels of header time can meet the demands.The quantity of one-level filter pipe is maximum, the space of laying, widest in area; Two, three ... the level header up reduces relatively step by step, concentrates; Connected mode between pipe fitting, the connecting elements that is adopted etc. also can be selected arbitrarily; They connect successively, communicate, and forming with vaccum drainage means 7 is the cubic drying and solidifying system like the tree root shape of foundation.

Though large stretch of one-level filter pipe net is hidden among soft foundation, but, because headers at different levels and vaccum drainage means all are arranged on the outside of soft foundation, and between headers at different levels the also corresponding air water by-pass valve control 6 that is equipped with, just can be, whether the one-level drainage pipeline section that detects separately quickly to be administered have problems by convenience valve; As can not exhaust, draining, then can give choke-out to the pipeline section that has fault or corresponding one-level filter pipe is taken out, changes, insert again, recover operate as normal.Realization is to effective control, the management of dredging strengthening system.

Stereosewering compacting-method for soft foundation is the connection between the tube and tube that makes filter pipe net, dismounting, changes, lays more convenient and flexible, is good with the pressure-bearing flexible pipe effect that is connected.

Stereosewering compacting-method for soft foundation shown in the accompanying drawing, filter pipe net is laid the various forms of embodiment, as: one-level filter pipe 1 by the infiltration plastic film capicitor, adorn the filter membrane cover outward and constitute, it takes individual layer, multilayer, in horizontal parallel, vertical, the interleaved mode one or more comprehensive, be provided with, be fixed on the physical relief at the bottom of the pond, or combine with drag-line 8 fixing suspentions or both and to be arranged in the soft foundation.The infiltration plastic film capicitor is an off-the-shelf, and intensity is good, cheap, and hole seam ventilative, drainage is positioned at the groove of bellows, and performance is good.The filter membrane that is sleeved on the filter pipe outside can adopt various natural, synthetic fibers, nonwoven or papery, and match Lopa Nationality Lopa Nationality squeeze etc. is made; It is sleeved on the filter pipe outside, suitably fixes the back standby is good.When needs, can adopt immersed tube construction method or other method in the processing of construction work ground, lay vertical filter pipe.Drag-line 8 can adopt various galvanized wires, hawser and so on, sets up, fixes formation.

Headers at different levels, establish spring on the ground of soft foundation outside, dike low bank between fields 9, carriage 10, or a few person combines as secondary header 3, three grades of headers 4, water header 5, by-pass valve control 6 and vaccum drainage means 7.Vaccum drainage means 7 can adopt that Pump Type Jet, vacuum pump type, diaphragm pump formula etc. are drawn water, exhaust equipment constitutes.

The above embodiments all have preferable functional performance, can both reach the effect of cubic drying and solidifying preferably.

Main contents, the step of construction are as follows:

1, structure is established filter pipe net: if desired, earlier at the peripheral dyke of works area, build banks between fields setting, installation bracket, drag-line and so on; Be connected with aqueduct by the scheme of setting, general the one-level filter pipe of suit filter membrane, make the one-level filter pipe be deployed to the preposition place; Again with aqueduct be provided with secondary header on the ground deposit the soft foundation outside, dike low bank between fields, the carriage, three grades of headers ..., it is safe that water header, vaccum drainage means connect successively each other, fix, and forms tree root shape cubic drying and solidifying system.

2, system works, the exhaust of drawing water, dredging strengthening confining bed inside: if when blowing-filling sludge epeirogenetic or other analogue, then should before system works, carry out hydraulic reclamation earlier and handle, reach the exhaust of drawing water again after the requirement, dredging strengthening.If layering, from bottom to top, successively draw water exhaust, dredging strengthening, effect is better.

3, the top layer after fixed is handled: the open fire of row earlier that open fire is arranged; Can take the circumstances into consideration to take various existing mode methods, draw water, the dredging strengthening top layer.

4, remove facility, site clearing.

These construction contents, step, what have can carry out simultaneously, and can intersecting of having carried out, and unwanted can down carrying out also can add the detection step according to circumstances, grasps flexibly.When table nature air-proof condition is relatively poor on the soft base, can take suitable mode to strengthen.

The relative prior art of the technical program has following advantage and effect:

1, simple, the easily operation of method.

2, three-dimensional, synchronously drainage reinforcing; The efficient height, the cycle is short; Cheap.

3, can adapt to various surface conditions, both can handle, also can the various soft foundations of blowing-filling sludge epeirogenetic or other similar applications be played a role original state mud, mud, swamp land and so on ground.

4, in a single day break down in the construction, can effectively handle, control, can adapt to the needs of actual engineering.

Claims

1, a kind of Stereosewering compacting-method for soft foundation adopts technique of soft soil foundation treatment, it is characterized in that:

Its filter pipe net of a/ is by one-level filter pipe (1), aqueduct (2), headers at different levels, water header (5) connect and compose successively with vaccum drainage means (7), concentrate the system that is the arrangement of tree root shape step by step, and air water by-pass valve control (6) is housed on the tube connector between header;

B/ one-level filter pipe places soft foundation, and headers at different levels, water header, by-pass valve control and vaccum drainage means all are arranged on the outside of soft foundation.

2, Stereosewering compacting-method for soft foundation as claimed in claim 1 is characterized in that: be connected with the pressure-bearing flexible pipe between the tube and tube of filter pipe net.

3, Stereosewering compacting-method for soft foundation as claimed in claim 1, it is characterized in that: one-level filter pipe (1) by the infiltration plastic film capicitor, adorn the filter membrane cover outward and constitute, it can take individual layer, multilayer, in horizontal parallel, vertical, the interleaved mode one or more comprehensive, be provided with, be fixed on the physical relief at the bottom of the pond, or combine with the fixing suspention of drag-line (8) or both and to be arranged in the soft foundation.

4, as claim 1,2,3 described Stereosewering compacting-method for soft foundation, it is characterized in that: headers at different levels, water header (5), by-pass valve control (6) and vaccum drainage means (7) are arranged on the ground, dike low bank between fields (9), carriage (10) of soft foundation outside, or a few person combines.