CN1168941A

CN1168941A - Cubic drying and solidifying method for soft foundation

Info

Publication number: CN1168941A
Application number: CN 97100566
Authority: CN
Inventors: 孙五奇
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-03
Filing date: 1997-02-03
Publication date: 1997-12-31
Anticipated expiration: 2017-02-03
Also published as: CN1058767C

Abstract

This invented drainage and strengthening method is that on the basis of vacuum precompression technigue , the soft tase soil is dewatered and strengthened by means of water filter pipes via different stage water collecting pipes and vacuum drainage system which are consecutively connected to form tree root-liki arranged system, the water filter pipes are constructed of laid skeleton and filter memgrame jacket, the control structure si set where necessary; water filter pipes are set in the soft base, and control structure and vacuum draining device are set outside the soft base. This method is simple and convenient, its effect of drainage and strengthening is high. It is short in construction period and low in coastruction cost, and can treat different kinds of 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 handpan, extensively adopt vacuum suction draining precompressed technology to carry out the construction of engineering in the soft base of sealing.

Use comparatively general vacuum method at present, it is to build the drainage sand drain or squeeze into drainage plastics sheet pile to constitute 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 is realized dredging strengthening to the draining of bleeding of soft base.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 execution conditions require harshness, applied environment to be restricted, and the cycle is long, expense is high, is difficult to adapt to the needs of actual engineering.

In ZL91111663 (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 to construct the cofferdam earlier on every side in the hydraulic reclamation pond, and the tail end of the pre-buried gravity flow filter pipe net in the face of land in the weir, pipe network is constructed the sealing collecting well, its filter pipe is to twine the structure that non-woven geotextile constitutes outside the ripple filter pipe again, need enclose the back-up sand filtering layer around the filter pipe, 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 the secondary pipeline and the first-level pipeline network that can flow automatically and forms by interconnecting, have certain longitudinal gradient, 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: owing to need enclose the back-up sand filtering layer around the filter pipe, if become silted up soft or then can't construct in water in the face of land, promptly powerless to original state mud, mud and so on ground, there is strict requirement mounting means and installation site to filter pipe, and significant limitation is arranged in the use; Can only be the individual layer dredging strengthening, corresponding effect be not good enough; Except that vaccum drainage means, other pipe network system is imbedded in soft basic bottom entirely, and the control corresponding structure is not set, and can not control respectively, in case partially sealed layer leaks gas, cracking, but can make whole system out of control, can't make pressure, work on; Outer sand filter blanket and the non-woven geotextile of filter pipe very easily washed open by current, causes local the obstruction, directly influences the drainage effect, and easy-to-search accident point not, even if can find, also is difficult to effectively handle.This technology exists preceding method construction technology complexity, conditional request harshness equally, and environment of applications is restricted, and 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 cycle 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, based on vacuum suction draining precompressed technology, 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 screening system is to connect and compose, concentrate step by step the drainage exhaust that is the arrangement of tree root shape to make negative pressure system by filter pipe successively by headers at different levels and vaccum drainage means, filter pipe is to apply the member that dress filter membrane cover constitutes by skeleton, needs the position of control that air water break-make control structure is housed in the system; Filter pipe places soft foundation, and air water break-make control structure and vaccum drainage means (removing the one-level moisture trap) all are arranged on the outside of soft foundation.

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

1, simple, the operation easily of method.

2, can be negligent of three-dimensional, synchronously 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, not be subjected to the restriction of ambient conditions 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.

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 filter pipe is parallel in this reinforcing method, mode is laid in layering;

Fig. 2 is bleed a kind of schematic diagram of draining precompressed of individual layer low level in this reinforcing method;

Fig. 3 is bleed a kind of schematic diagram of draining precompressed of layering low level in this reinforcing method;

Fig. 4 is a kind of aggregate erection structural representation of vaccum drainage means in this reinforcing method;

Fig. 5 is parallel, the vertical a kind of schematic diagram with cross-synthesis laying mode of filter pipe;

Fig. 6 is a kind of schematic diagram of the fixing suspention of filter pipe drag-line laying mode;

Fig. 7 is parallel and vertical combines and header at different levels, by-pass valve control and vaccum drainage means all are arranged on a kind of vertical view on dike low bank between fields or the carriage of filter pipe.

This Stereosewering compacting-method for soft foundation, the filter pipe 1 in the screening system is in order to the filtering silt particle, receives the member of water, gas in the soft base, and it is the integrated member that is made of skeleton and two part assemblings of filter membrane cover.Skeleton can adopt different shape, material, perforated pipe shape part or other member to constitute, and as adopting the drainage plastic film capicitor, the tubular articles that various metals with holes, water-fast non-metallic pipe, spiral metal wire and other have certain rigidity constitutes.The filter membrane cover be filter pipe directly in order to the part of filtering silt particle, it can adopt various natural, filter membranes that synthetic fibers are made, constitutes as making corresponding pipe box spare with non-woven geotextile or braiding filter cloth.Both apply the form of dress and can select as one sees fit, as the outside that the filter membrane cover is sleeved on tubular skeleton, and in position sentence rope and tie up fixingly, make it become the filter pipe integrated member.It is advisable with disposable member, can reduce cost, example filter pipe 1 adopt the infiltration plastic film capicitor, outward adorn filter membrane cover that non-woven geotextile makes fixingly constitute, standby, the infiltration plastic film capicitor is an off-the-shelf, intensity is good, cheap, the hole seam of ventilative drainage is positioned at the groove of bellows, and functional performance is

good.Headers

2,3,4,5 at different levels adopt the good various durable anti-negative pressure tubing of intensity to be advisable, and as steel pipe, plastic pipe etc., they can have enough to meet the need use, save cost; The level of header is inferior can be according to the concrete condition setting of engineering, and operated by rotary motion

secondary header

3 and 4, two levels of three grades of headers are inferior, can meet the demands; The mode of header setting, position can be set as required.The quantity of filter pipe is many, and space, the scope of laying are wide; Header up reduces relatively step by step, concentrates.The setting of filter pipe, header, installation, job practices: when condition permission, people can enter construction ground, can take the methods of directly presetting, settling or adopt immersed tube construction method and other method in the processing of construction work ground to lay, grappling, ballast, support, suspend layering in midair, wait pipe fitting is fixed; When the geology condition disapproves but the people can prop up and so on when entering by corresponding tool such as ship, can take to press push away, methods such as sedimentation handle.The vaccum drainage means 7 that is made of vacuum pump, water pump and moisture trap can adopt commercially available product respectively, and aggregate erection on demand forms.Air water break-make control structure 6, it can adopt valve, flexible pipe adapted anchor clamps or other form of structure to constitute, as long as can realize break-make control function to gas, water.Though large stretch of filter pipe is hidden within soft foundation since system externally, need the position of control that air water break-make control structure is housed; Just can whether have problems by the drainage pipeline section that it detects separately to be administered quickly and easily, as can not exhaust, draining, then can give choke-out to the pipeline section that has fault or corresponding filter pipe is taken out, changes, again insert, recover operate as normal, realize effective control, management the dredging strengthening system.Stereosewering compacting-method for soft foundation is to be connected successively, to communicate with vaccum drainage means by headers at different levels by such filter pipe, concentrate step by step, and filter pipe places soft foundation, air water break-make control structure and vaccum drainage means (removing the one-level moisture trap) all are arranged on the outside of soft foundation, and forming with vaccum drainage means 7 is the cubic drying and solidifying system like the tree root shape of trunk.Because filter pipe is one to have the member of good water filtering performance, it need not to rely on any complementary measure, and promptly its installation site and mounting means in soft base is not subjected to any restriction, is arranged on any position required in the soft base easily by variety of way.As long as the sealing of its top better, it is fixed to adopt vacuum suction draining precompressed technology can guarantee that fully soft base carries out drainage from bottom to top, effectively.The confining bed on soft basic top can be routinely or otherwise processed, and its drainage is solidified.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.In this law, soft basic sealant only with the watertight for the treatment of drainage medium self performance of holding one's breath, can satisfy the requirement of vacuum suction draining drainage precompressed technology, if take appropriate measures the enhancing sealing, effect can be better.So it is simple, convenient and swift that it is a kind of technology, the cycle is short, cost is low, and cubic drying and solidifying method controlled, that can adapt to various soft foundations.

Satisfying under the prerequisite of above-mentioned requirements, all can be as for the others in the system according to the occasion of using, concrete geology, landforms state, environment, condition, actual use needs and possible factor etc. is taken the circumstances into consideration setting.As:

Stereosewering compacting-method for soft foundation, filter pipe can be taked individual layer, multilayer, in horizontal parallel, vertical, the interleaved mode one or more comprehensive is provided with, is fixed on the physical relief at the bottom of the pond or with fixing suspention of drag-line or alternate manner and be arranged in the soft foundation.Drag-line 8 can adopt various galvanized wires and hawser and so on, sets up, fixes formation.As the methods in accompanying

drawing

1,2,3,5,6,7 illustrated embodiments.

In the Stereosewering compacting-method for soft foundation, air water break-make control structure and vaccum drainage means (remove one-level moisture trap) are arranged on the ground, dike low bank between fields 9, carriage 10 of soft foundation outside, or several persons combine, and can make things convenient for, operate quickly and easily, check, implement effectively control.As the methods in accompanying

drawing

1,2,3,4,5,6,7 illustrated embodiments.

In the Stereosewering compacting-method for soft foundation, treat the following position of the soft base of drainage if the moisture trap in the vaccum drainage means and water pump be arranged at, constitute current only downwards the low level of guiding vacuumize, the draining precompressed then can effectively be used the negative pressure energy, saves the energy.As the methods in accompanying

drawing

2,3 illustrated embodiments.

Stereosewering compacting-method for soft foundation, in above-mentioned each example, if vaccum drainage means be by one-level moisture trap 7-1 successively with have two of self-closing float valve, three grades of moisture trap 7-2,3 and vacuum pump 7-4 be connected, one, control air water break-make structure 6 is installed on the pipeline between the secondary moisture trap, one, two, on the pipeline between three grades of moisture traps vacuum meter is housed respectively also, installation can prevent gas in the one-level moisture trap, the submersible pump 7-5 of water return valve, but the both vacuum suctions draining that is constituted, when but depletion is made the dual-purpose type structure of negative pressure again, system is further strengthened make negative pressure ability and drainage consolidation effect.As shown in Figure 4 combining structure example and the application mode method in Fig. 2,3 illustrated embodiments thereof.

In the Stereosewering compacting-method for soft foundation, for making tube and tube, pipe being connected with other device, between installing, dismounting are changed, lay more convenient and flexible, are connected with the pressure-bearing flexible pipe between the pipe fitting in the screening system, and effect is good.Methods as accompanying

drawing

1,2,3,4,5,6,7 illustrated embodiment junctions.

The above embodiments can both be carried out cubic drying and solidifying to soft foundation preferably.When wherein vacuumizing the draining precompressed and adopting depletion to make negative pressure structure with low level, can give full play to the lift drainability and the speciality of the suction capactity and the water pump of vacuum pump, the function that also has similar Hydraulic Power Transmission System can make Stereosewering compacting-method for soft foundation reach best result of use.

Main contents, the step of construction are as follows:

1, structure is established screening system: if desired, earlier at the peripheral dyke of works area, build banks between fields setting in the district, installation bracket, drag-line and so on; By the scheme of setting, filter pipe is connected with the segment set water pipe, and after making them be set to the preposition place, is connected with other header and vaccum drainage means again, fixes safe, formation tree root shape cubic drying and solidifying system.

2, system works, the draining of bleeding, 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 draining of bleeding again after the requirement, be negligent of reinforcing.If take layering, from bottom to top, successively bleed draining, dredging strengthening, effect is better.

3, the top layer in fixed later stage is handled: the open fire of row earlier of open fire is arranged, and what need takes various existing mode methods, draws water, the dredging strengthening top layer; Smooth then row pressure is handled.

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 variety of way enhanced leaktightness effect.

Claims

1, a kind of Stereosewering compacting-method for soft foundation adopts vacuum suction draining precompressed technology, it is characterized in that:

Its screening system of a/ is to connect and compose, concentrate step by step the drainage exhaust that is the arrangement of tree root shape to make negative pressure system by filter pipe successively by headers at different levels and vaccum drainage means, and filter pipe is to apply the member that dress filter membrane cover constitutes by skeleton;

The b/ filter pipe places soft foundation, and air water break-make control structure and vaccum drainage means (removing the one-level moisture trap) all are arranged on the outside of soft foundation.

2, Stereosewering compacting-method for soft foundation as claimed in claim 1, it is characterized in that: filter pipe can be taked individual layer, multilayer, in horizontal parallel, vertical, the interleaved mode one or more comprehensive is provided with, is fixed on the physical relief at the bottom of the pond or with fixing suspention of drag-line or alternate manner and be arranged in the soft foundation.

3, Stereosewering compacting-method for soft foundation as claimed in claim 1 is characterized in that: air water break-make control structure and vaccum drainage means (remove one-level moisture trap) are arranged on the ground, dike low bank between fields, carriage of soft foundation outside, or a few person combines.

4, Stereosewering compacting-method for soft foundation as claimed in claim 1 is characterized in that: the moisture trap in the vaccum drainage means and water pump are arranged at treat the following position of the soft base of drainage, constitute current direction down the low level of guiding vacuumize draining.

5, as claim 1,2,3,4 described soft foundation solids are negligent of reinforcing method, it is characterized in that: vaccum drainage means be by the one-level moisture trap successively with have two of self-closing float valve, three grades of moisture traps and vacuum pump are connected, one, control air water break-make structure is installed on the pipeline between the secondary moisture trap, one, two, on the pipeline between three grades of moisture traps vacuum meter is housed respectively also, installation can prevent gas in the one-level moisture trap, the submersible pump of water return valve, but the both vacuum suctions draining that is constituted, but depletion is made the dual-purpose type structure of negative pressure again.

6, as claim 1,2,3,4 described Stereosewering compacting-method for soft foundation, it is characterized in that: be connected with the pressure-bearing flexible pipe between the pipe fitting in the screening system.