CN1957143A - Method for reinforcing soft ground - Google Patents
Method for reinforcing soft ground Download PDFInfo
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- CN1957143A CN1957143A CN 200580016230 CN200580016230A CN1957143A CN 1957143 A CN1957143 A CN 1957143A CN 200580016230 CN200580016230 CN 200580016230 CN 200580016230 A CN200580016230 A CN 200580016230A CN 1957143 A CN1957143 A CN 1957143A
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A method of improving soft ground, capable of effectively restricting settlement of a peripheral part of ground to be improved involved in improvement of the soft ground. A vertical supply path is formed by placing a vertical drain material (101) in ground (B) in the periphery of ground to be improved, and water containing a water stop material (102) is charged in the vertical supply path to supply the water containing the water stop material (102) to the ground (B) through the vertical supply path. Then the water stop material (102) charged in the vertical supply path follows a water flow and spreads in the periphery of the vertical supply path to form a water stop zone (107). The water stop zone (107) formed by the water stop material (102) prevents the movement of ground water in the ground (B) and restricts lowering of the ground water in the ground (B) caused by forced drainage from ground (A) to be improved, effectively restricting settlement of the ground (B) involved in improvement of soft ground.
Description
Technical field
The present invention relates to be suitable for form the reinforced construction method of the soft foundation of soft foundations such as zone such as the landfill around, the lake bog.More particularly, the present invention relates to suppress effectively reinforcing, the reinforced construction method of the soft foundation that the underground water of consolidated subsoil periphery reduces along with soft foundation.
Background technology
In the past, reinforced construction method as soft foundation, by inner liner, above the soft foundation (being called " consolidated subsoil " below) that covering is reinforced, in above-mentioned consolidated subsoil, apply vacuum pressure, in above-mentioned consolidated subsoil, form and the isolated reduced pressure zone of opening of consolidated subsoil periphery, and, apply the densification load weight of mound at the enterprising windrow soil of consolidated subsoil, thus, be the hard ground with reinforced soft soil ground.
Specifically, as shown in figure 17, in consolidated subsoil A, with prescribed distance vertical drainage part 1 is set, then, the mode that contacts according to the top ends 1a with each vertical drainage part 1 is provided with horizontal drainage spare 2, then, by vacuum tank 4, with this horizontal drainage spare 2 be connected with header 3 that vacuum pump 5 is communicated with, in addition, with inner liner 7, with the end face of consolidated subsoil A, with top ends 1a, horizontal drainage spare 2 and header 3 coverings of above-mentioned vertical drainage part 1.Then, make vacuum pump 5 runnings that are connected with above-mentioned header 3 by vacuum tank 4.
Thus, by horizontal drainage spare 2 and vertical drainage part 1, being delivered to consolidated subsoil A from the vacuum pressure of vacuum pump 5, is the center with vertical drainage part 1, and the ground around it constitutes the zone (being called " reduced pressure zone " below) of decompression state.
Pressurization along with this ground, interstitial water in the ground around the vertical drainage part 1 is attracted to vertical drainage part 1, discharge by vertical drainage part 1, horizontal drainage spare 2 and header 3 as drainage channel, along with this situation, the ground around the more lateral of the ground around the vertical drainage part 1 also forms reduced pressure zone.
So, be the center with vertical drainage part 1, in the ground around it, the reduced pressure zone expansion, the whole zone of consolidated subsoil A finally forms reduced pressure zone, simultaneously, with vertical drainage part 1 is the center, carries out densification, strength-enhanced, and carries out densification, the strength-enhanced in the whole zone of consolidated subsoil A.
As mentioned above, reinforce and be the hard ground, on the other hand, at inner liner 7 enterprising windrow soil 6, thus, by the densification load weight of this mound 6, carry out the densification dehydration of consolidated subsoil A,, promote the densification sedimentation (with reference to patent documentation 1) of consolidated subsoil A with the sucking-off acting in conjunction of above-mentioned pressure differential.
No. 3270968 documents of patent documentation 1:JP patent are (with reference to claim 1 and 2, Fig. 7).
The disclosure of an invention scheme
The problem that invention will solve
But, by above-mentioned pressure densification dehydration job practices, by vacuum pressure, the underground water of consolidated subsoil is forced to discharge, but, in the scope of the periphery that comprises consolidated subsoil and consolidated subsoil,, form the higher layer of sand of water permeability in the inside of ground, under the situation of organic soil layer, shown in the arrow among Figure 17, owing to also the underground water of consolidated subsoil periphery B is forced to discharge, so the underground water of consolidated subsoil periphery also reduces, because this influence, for soft peripheral ground, also promote deadweight Consolidation, cause problems such as sedimentation.
When phreatic draining causes sedimentation, owing to As time goes on its influence basin enlarges, in order to keep the quality of foundation improvement, and necessarily require in the pressure densification dehydration job practices of sufficient densification time, then form reaction, therefore necessarily require to take to reduce as much as possible the measure of consolidated subsoil influence in addition.
The present invention be directed to such technical task and propose, the object of the present invention is to provide the reinforcing that can suppress effectively, the reinforced construction method of the soft foundation of the phreatic decline of consolidated subsoil surrounding area along with soft foundation.
The technical scheme that is used to solve
To achieve these goals, the described invention of claim 1～14 relates to the reinforced construction method (abbreviating " reinforced construction method " below as) of following soft foundation, wherein, inside at soft foundation, utilize vacuum pressure, form the reduced pressure zone of keeping apart, discharge the interstitial water in the above-mentioned consolidated subsoil with the consolidated subsoil periphery, it is the hard ground that above-mentioned consolidated subsoil is reinforced, and it is characterized in that:
Inside at the ground of above-mentioned consolidated subsoil and/or consolidated subsoil periphery, form vertical supply passageway, the water that will have sealing part is circulated into the inside of this vertical supply passageway, by this vertical supply passageway, in the inside of the ground of consolidated subsoil and/or consolidated subsoil periphery, supply with water with sealing part.
The described invention of claim 15～30 relates to above-mentioned reinforced construction method, it is characterized in that inside at the ground of consolidated subsoil periphery, form vertical supply passageway, water and sealing part are circulated into the inside of this vertical supply passageway, on the other hand, between vertical supply passageway and consolidated subsoil and/or the outside of above-mentioned vertical supply passageway, form the vertical drainage path, by the vertical drainage path, discharge the water of inside of the ground of above-mentioned consolidated subsoil periphery.
The effect of invention
In the described reinforced construction method of claim 1～14, because ground inside at consolidated subsoil and/or consolidated subsoil periphery, form vertical supply passageway, by this vertical supply passageway, the water that will have sealing part supplies to the inside of the ground of consolidated subsoil and/or consolidated subsoil periphery, so the sealing part of inside of putting into above-mentioned vertical supply passageway is spread in vertical supply passageway periphery along with current, form the sealing zone.
Realize following effect, promptly, the sealing zone that forms by sealing part can hinder the phreatic of ground inside of consolidated subsoil and/or consolidated subsoil periphery and move, can suppress to suppress foundation settlement effectively along with the consolidated subsoil periphery of ground stabilization along with the phreatic reduction in the ground of the consolidated subsoil periphery of the phreatic forced drainage of consolidated subsoil.
In the described reinforced construction method of claim 15～30, because sealing part is poured into the inside of the vertical supply passageway of the inside that is formed at peripheral ground with water, on the other hand, between above-mentioned vertical supply passageway and consolidated subsoil and/or the outside of above-mentioned vertical supply passageway, form the vertical drainage path, by this vertical drainage path, discharge the water of the ground inside of above-mentioned consolidated subsoil periphery, so the sealing part of inside of putting into vertical supply passageway is along with from vertical supply passageway, to the current of vertical drainage path and spread, in the inside of the ground of consolidated subsoil periphery, form the sealing zone.
Realize following effect, promptly, the sealing zone that forms by sealing part can hinder the phreatic of ground inside of consolidated subsoil periphery and move, phreatic reduction can be suppressed, the foundation settlement of consolidated subsoil periphery of the reinforcing of soft foundation can be suppressed to follow effectively along with the ground inside of the consolidated subsoil periphery of the phreatic forced drainage of consolidated subsoil.
In this reinforced construction method, because sealing part is by from vertical supply passageway, carry and spread to the current of vertical drainage path, thus the sealing zone can be formed smoothly and positively, along with the sedimentation of the ground of the consolidated subsoil periphery of the reinforcing of soft foundation suppresses effect.
Brief description of drawings:
Fig. 1 is the generalized section of the suitable examples of expression reinforced construction method of the present invention;
Fig. 2 is the generalized section of the vertical supply passageway of expression;
Fig. 3 is the floor map of this vertical supply passageway of expression;
Fig. 4 comprises the schematic diagram of the system that pours into of the water of sealing part for expression;
Fig. 5 be illustrated in the vertical drainage part head portion that is arranged in consolidated subsoil and/or the peripheral ground around, the enlarged perspective of major part of the example of layer of sand is set;
Fig. 6 is the generalized section of another example of the vertical supply passageway of expression;
Fig. 7 is the generalized section of the suitable examples of expression processing job practices of the present invention;
Fig. 8 is the floor map of above-mentioned Fig. 7;
Fig. 9 for expression by sealing part is circulated into the inside of vertical drainage part with water, and the mode of vacuum pump running is moved, the generalized section that flows of water and sealing part;
Figure 10 is the floor map of above-mentioned Fig. 9;
Figure 11 passes through reinforced construction method of the present invention for expression, is formed at the generalized section in the sealing zone between processing ground and the peripheral ground;
Figure 12 is the floor map of above-mentioned Figure 11;
Figure 13 represents another suitable examples of reinforced construction method of the present invention, its for expression by sealing part is circulated into vertical drainage part inside with water, and the mode of vacuum pump running is moved, the generalized section that flows of water and sealing part;
Figure 14 for expression by reinforced construction method shown in Figure 13, be formed at the generalized section in sealing zone of the inside of peripheral ground;
Figure 15 represents an also suitable examples of reinforced construction method of the present invention, its for expression by sealing part is circulated into vertical drainage part inside with water, and the mode of vacuum pump running is moved, the generalized section that flows of water and sealing part;
Figure 16 passes through reinforced construction method shown in Figure 15 for expression, is formed at the generalized section in the sealing zone of peripheral ground inside;
Figure 17 is the schematic diagram of the suitable examples of expression reinforced construction method in the past.
The explanation of label:
Label 11,101,103,103a, 103b represent the vertical drainage part;
Label 12,104,104a, 104b represent horizontal drainage spare;
Label 13,106,106a, 106b represent inner liner;
Label 15,105,105a, 105b represent vacuum pump;
Label 107,107a, 107b represent the sealing zone;
The unsteady flap valve of label 110 expressions;
The layer that label 111 expressions are formed by grit or roughing sand;
Symbol A represents to process ground;
Symbol B represents peripheral ground;
Symbol C represents the layer of sand that water permeability is higher, organic soil layer;
Grit layer in the middle of symbol D represents.
The optimal way that is used to carry out an invention
Below according to the illustrated embodiment, reinforced construction method of the present invention is more specifically described.The described reinforced construction method of claim 1～14 is described.This reinforced construction method adopts vacuum pressure in soft foundation, form the reduced pressure zone of keeping apart with the consolidated subsoil periphery, discharges the interstitial water in the above-mentioned soft foundation, thus, above-mentioned soft foundation is processed as the hard ground.
In consolidated subsoil, adopt vacuum pressure, the method for making the reduced pressure zone of keeping apart with the consolidated subsoil periphery does not limit especially.Such as, the JP that the inventor proposes speciallys permit document No. 3270968, the reinforced construction method of putting down in writing in the TOHKEMY 2003-55951 document is compared with the job practices in the past of adopting sand cushion in the past, can more effectively vacuum pressure be put in the consolidated subsoil, can realize more effectively reinforcing.
It is following method that JP speciallys permit No. 3270968 described reinforced construction method of document, wherein, passes through inner liner, cover the consolidated subsoil end face, in above-mentioned consolidated subsoil, apply vacuum pressure, thus, in above-mentioned consolidated subsoil, form the reduced pressure zone of keeping apart with the consolidated subsoil periphery, as shown in Figure 1, this method is made of following step, promptly, in consolidated subsoil A, except top ends, with the spacing of regulation, set vertical drainage part 11, thus, in ground A, form the vertical drainage wall; The horizontal drainage spare 12 that is connected with vacuum pump P is according to the horizontal setting of mode that contacts with vertical drainage part top ends 11a; By inner liner 13,, cover with vertical drainage wall top ends 11a and horizontal drainage spare 12 with ground A; Make vacuum pump 15 runnings that are connected with horizontal drainage spare 12 by header 14 and vacuum tank (not shown), on the end face of ground A, form the state of vacuum pressure.
In addition, also can be shown in TOHKEMY 2003-55951 document, when ground stabilization, apply vacuum pressure, in consolidated subsoil, form reduced pressure zone, thus, the drainage channel of the transmission path by being different from above-mentioned vacuum pressure is discharged from the interstitial water of the inside sucking-off of consolidated subsoil.
Specifically, as shown in Figure 1, in consolidated subsoil A, inside at the consolidated subsoil A of the bottom side of the header 14 that is connected with each vertical drainage part 11 of being provided with of spacing by horizontal drainage spare 12 with regulation, the discharge casing 16 that is communicated with place outside the consolidated subsoil A is set, the interstitial water that comes together in the above-mentioned header 14 is arranged to above-mentioned discharge casing 16.
At this moment, best, as shown in Figure 1, header 14 and discharge casing 16 are connected the separation member 18 that water and air separates by utilizing gravity, by this separation member 18, with the above-mentioned discharge casing 16 that leads of the interstitial water in the above-mentioned header 14.In addition, in the inside of discharge casing 16, drainage pump 17 is set, the interstitial water with in the above-mentioned discharge casing 16 by linking gutter 19 local outside the consolidated subsoil A, is discharged to the place outside the consolidated subsoil A forcibly, thus, can realize more effectively draining.
In addition, also can when ground stabilization, on soft foundation A, banket 20 as shown in Figure 1, apply 20 the densification load weight of banketing.This bankets 20 heaps on inner liner 13.Thus,,, carry out the densification dehydration of consolidated subsoil A, under the acting in conjunction of the sucking-off of pressure differential, promote the densification sedimentation of consolidated subsoil A with good efficiency more by this densification load weight of 20 of banketing.
At above-mentioned reinforced construction method, the invention is characterized in the inside of ground (being called " peripheral ground " below) at consolidated subsoil and/or consolidated subsoil periphery, form vertical supply passageway, inside at this vertical supply passageway, pour into water with sealing part, by this vertical supply passageway, the water that will have sealing part supplies to the inside of consolidated subsoil and/or peripheral ground.
If as mentioned above, realize the densification dehydration of consolidated subsoil A, under the acting in conjunction of the sucking-off of the interstitial water of pressure differential, promote the densification sedimentation of consolidated subsoil A, then as shown in Figure 2, in according to scope, has the higher layer of sand of water permeability across consolidated subsoil A and peripheral ground B, under the situation of organic soil layer C, also the underground water of the inside of the peripheral ground B beyond the consolidated subsoil A is discharged forcibly.Thus, have, cause the danger of the situations such as sedimentation of weak peripheral ground B because of above-mentioned influence.
For fear of such situation, in reinforced construction method of the present invention,, form vertical supply passageway in the inside of consolidated subsoil and/or peripheral ground, in the inside of this vertical supply passageway, pour into water with sealing part.
Specifically, as Fig. 1～shown in Figure 3, the mode according to around consolidated subsoil A in the inside of peripheral ground B, with prescribed distance, is provided with a plurality of vertical drainage parts 101, forms vertical supply passageway.At this moment, best, vertical supply passageway forms according to the mode of separating slightly with consolidated subsoil A.Specifically, can according to consolidated subsoil A, separately the mode of 1～2m forms.
Fig. 5 represents following form, and wherein, in the inside of consolidated subsoil A, the boundary member at itself and peripheral ground B with prescribed distance, is provided with a plurality of vertical drainage parts 101, forms vertical supply passageway.
In addition, vertical supply passageway is according to the kind of consolidated subsoil A or peripheral ground B, needn't necessarily be formed at the inside of peripheral ground B according to mode around consolidated subsoil A with prescribed distance, or with the inside of prescribed distance at consolidated subsoil A, be formed at the boundary member of itself and peripheral ground B, this vertical supply passageway can be in the inside of consolidated subsoil A or peripheral ground B, and the concentrated area is formed at the reinforcing along with ground, has the part of the phreatic danger of discharging this periphery ground B forcibly.
In addition, Fig. 1～Fig. 3 or Fig. 5 are illustrated in the inside of consolidated subsoil A or peripheral ground B, form the example of vertical supply passageway, but, also can be corresponding to the kind of consolidated subsoil A and peripheral ground B, the layer of sand that water permeability is higher, the scale of organic soil layer C, shape in the inside of consolidated subsoil A and the inside of peripheral ground B, forms vertical supply passageway.
As the vertical drainage part 101 that is adopted, if can be along the depth direction of consolidated subsoil A or peripheral ground B, form the path of supplying with water with sealing part, it can be any kind, specifically, can enumerate following type, wherein, with rectangular plastic wire is core, in the interior outside of this net, the filtration beds that the fibre plate by nonwoven, felt, fabric, braid etc. forms is set.In this occasion, best, the filtration beds of vertical drainage part 101 by width of mesh can make that sealing part 102 passes through fibre plate constitute.
In addition, vertical supply passageway also can be made by following method, this method is: in the zone that sets outside the vertical drainage part 101, in the inside of consolidated subsoil A or peripheral ground B, have the pipe (ported sub) in a plurality of holes that sealing part 102 can pass through along the depth direction setting.
Water as the inside of the vertical supply passageway that is circulated into consolidated subsoil A and/or peripheral ground B (vertical drainage part 101 or ported sub) with sealing part 102, such as, can adopt the form of the suspension of the hydrophilic colloid that forms by the polysaccharide esters such as ester class that with CMC or mosanom are principal component.
When the water of the sealing part that will have above-mentioned form is circulated into the inside of vertical supply passageway 101, also can such as, as shown in Figure 4, the sealing part case 108 that has the water (hydrophilic gel liquid suspension) of sealing part from storage, by supply pipe 109, the water that will have above-mentioned sealing part supplies to the inside of vertical supply passageway 101.
In this occasion, from sealing part case 108, by supply pipe 109, supply to vertical supply passageway 101 inside hydrophilic gel suspension same as before, inside at vertical supply passageway 101 flows down, according to the impetus of these current, by vertical drainage part 101 (or ported sub), flow out and be spread in the higher layer of sand of water permeability that is provided with in scope, among organic soil layer C across consolidated subsoil A and peripheral ground B.
Flow out and be spread in the higher layer of sand of water permeability, the part of the sealing part 102 (hydrophilic colloid) in the suspension of the inside of organic soil layer C such as Fig. 1～shown in Figure 3, at layer of sand, stagnate the inside of organic soil layer C, be in the state of the mesh obstruction of part, the water flowing reduction.
Water with sealing part 102 (hydrophilic colloid) concentrates on the higher layer of sand of water permeability of the mesh obstruction of part, and the gap portion of organic soil layer C (not producing the part that mesh stops up) is post by this gap portion.In this process, sealing part 102 (hydrophilic colloid) seals gap portion.
So, by sealing part 102 (hydrophilic colloid), the layer of sand that water permeability is higher, the gap portion of organic soil layer C little by little stops up, soon at Fig. 3 and the higher layer of sand of water permeability shown in Figure 5, the inside of organic soil layer C, the effect that the coincidence by pressure connects forms the sealing zone 107 that is formed by sealing part 102 (hydrophilic colloid).
By this sealing zone 107, will be by the higher layer of sand of water permeability across consolidated subsoil A and peripheral ground B, the phreatic path that organic soil layer C forms is isolated, avoids the forced drainage along with ground stabilization, the situation that the underground water of peripheral ground B reduces.
On the other hand, do not forming the higher layer of sand of water permeability according to mode across consolidated subsoil A and peripheral ground B, the occasion of organic soil layer C, or be the layer of sand that water-based is higher, the top of organic soil layer C has the occasion of middle grit layer D, even pass through under the situation of this centre grit layer D at the water with sealing part 102 (hydrophilic gel liquid suspension), and the inside of grit layer D in the middle of sealing part 102 is not stranded in, same as before along current, to consolidated subsoil A side shifting.
In inside across the middle grit layer D of the scope of consolidated subsoil A and peripheral ground B, along with current, arrive the vertical drainage part 11 of the vertical supply passageway that constitutes the inside that is formed at consolidated subsoil A to the sealing part 102 (hydrophilic colloid) of consolidated subsoil A side inflow.In illustrated form, by adopt the surface by width of mesh can not be by imbibition the vertical drainage part 11 of filtration beds formation of sealing part 102 (hydrophilic colloid), this vertical drainage part 11 is set, thus, in the inside of consolidated subsoil A, form vertical supply passageway.Like this, along with current, arrive of the filtration beds prevention of the sealing part 102 (hydrophilic colloid) of vertical drainage part 11 by the surface of vertical drainage part 11, can't enter inside, be attached to by pressure on the surface of vertical drainage part 11, in the filtration beds on the surface of vertical drainage part 11, produce mesh and stop up, form sealing zone 107 here.
Be formed at 107 the vertical drainage parts 11 in sealing zone in the filtration beds on surface of vertical drainage part 11 by consolidated subsoil A side, stop the phreatic mobile effect of inside of the middle grit layer D of the scope be across consolidated subsoil A and peripheral ground B, by this sealing zone 107, partition is across the phreatic stream of the inside of the middle grit layer D of consolidated subsoil A and peripheral ground B, avoid forced drainage, the situation that the underground water of peripheral ground B reduces along with ground stabilization.
In addition, adopting the vertical drainage part 11 that can not constitute by the filtration beds of sealing part 102 by width of mesh, in the filtration beds on the surface of vertical drainage part 11, form sealing zone 107 o'clock, because sealing part 102 is in the filtration beds on the surface of the vertical drainage part 11 of the inside that is arranged at consolidated subsoil A, only be attached to the part of the middle grit layer of contact D, here, form sealing zone 107, so for vertical drainage part 11 inside and the part that contacts with this centre grit layer D part in addition, guarantee the function that vertical drainage part 11 is original, therefore, not having can not water flowing and/or the disadvantage that can not ventilate.
If because of sealing part 102 (hydrophilic colloid), form sealing zone 107, or form the state of the mesh obstruction of part, then water does not move, and supplies to the excess supply of this water with sealing part 102 (hydrophilic gel liquid suspension).
At this moment, the floating type flap valve 110 that is arranged at the inside of vertical supply passageway 101 rises and rises along with the liquid level of the excess supply of the water with sealing part (hydrophilic gel liquid suspension), with the supply port (not shown) sealing of vertical supply passageway 101, interrupt having of the supply of the water of sealing part to the inside of vertical supply passageway 101.If interruption has the supply of the water of sealing part, then from sealing part case 108, by supply pipe 109, the water with sealing part (hydrophilic gel liquid suspension) that is circulated into the inside of vertical supply passageway 101 does not pour into the inside of vertical supply passageway 101, by recurrent canal 109a, turn back in the sealing part case 108 same as before.
In addition, in the occasion of above-mentioned form, along with the size of sealing part 102 (hydrophilic colloid), the formation of part mesh blocked state, various variations take place in the degree of the formation in sealing zone.Thus, best, synthetically judge what, the size of the pressure during ground stabilization etc. of scale, the groundwater run off of kind, the ground stabilization of ground or peripheral ground, suitably control the size of molecular weight, adjust the size of colloid.In addition, when the hydromining with sealing part 102 is used the hydrophilic gel liquid suspension, owing to the effect of the sealing zone that is formed by hydrophilic colloid by the coincidence connection of pressure forms, if so there is not pressure differential, hydrophilic colloid returns to floating state, like this, as after ground improves, original water permeability is recovered, and is difficult to underground water environment is produced the measures of preventing water of long-term influence, is extremely useful.
In addition, for sealing part 102, except hydrophilic colloid, cereal or its crushed material of sawdust, wood powder, husk, rice, wheat, grain, millet, beans, broomcorn millet etc.; From the chaff class, shell class, clay or carboxymethyl cellulose crosslinked thing, crosslinked polyacrylate, starch, clay, cement and the acrylonitrile graft copolymer that produce when removing the crust (cereal) of above-mentioned cereal, PVA maleic acid, as the copolymer of vinyl acetate and acrylate, the mixture more than a kind or 2 kinds that water absorbent rate is selected in 30～1500 times high water absorbency polymer all can adopt.
For sealing parts such as above-mentioned sawdust, wood powders, swelling before dropping into forms suspension, can supply in the vertical supply passageway 101 by device shown in Figure 4, method equally.
For sealing parts such as above-mentioned sawdust, wood powders, also can swelling after dropping into.Below this is described.Fig. 6 represents following form, wherein, around the head portion of the vertical drainage part 101 in being arranged at consolidated subsoil A and/or peripheral ground B, the layer 111 that setting is formed by grit or roughing sand, in the layer 111 that forms by grit or roughing sand, pour into have sawdust, the water of the sealing part 102 of wood powder etc.In form shown in Figure 6, around the head portion of vertical drainage part 101, diameter is set in the scope of 15～30cm, the degree of depth is at pipe (can be any type of with holes or atresia) or the shell 112 of 10～30cm, remove the native sand of the inside of pipe or shell 112, then, fill by husky, grit material, around the head portion of vertical drainage part 101, be provided with by grit or roughing sand forms layers 111.In the layer 111 that forms by grit or roughing sand, insert a plurality of pipe 113 (can be any type of with holes or atresia) that pour into, pour into pipe 113 by this, pour into water with sealing part 102.
Thus, open in the internal extended of the integral body of the layer 111 that forms by grit or roughing sand, have the inside that the water that prevents part 102 is circulated into vertical drainage part 101 quickly by pouring into pipe 113 the water that pour into sealing part 102.Promptly, by around the head portion of vertical drainage part 101, layer 111 the mode that setting is formed by grit or roughing sand, the absorption portion of water is not only around the head portion of vertical drainage part 101, and by grit or roughing sand form the layer 111 integral body that forms also constitute the suction part, thus, water improves significantly to the feed speed of vertical drainage part 101.
In addition, Fig. 6 represents following example, wherein, around the head portion of the vertical drainage part 101 in being arranged at consolidated subsoil A and/or peripheral ground B, the layer 111 that setting is formed by grit or roughing sand, but, also can around the head portion of the pipe that has a plurality of holes (ported sub) in being arranged at consolidated subsoil A and/or peripheral ground B, the layer that is formed by grit or roughing sand be set similarly.
Also can comprise sealing part in the interstitial water from consolidated subsoil A, form the water with sealing part, the water that will have sealing part is circulated into the inside of above-mentioned vertical supply passageway.In this occasion, in top ends as the vertical drainage part 101 (or pipe) of the vertical supply passageway of the inside that is formed at consolidated subsoil A and/or peripheral ground B, connect the groove 115 (or pipe) that is communicated with gutter 19 from the interstitial water of consolidated subsoil A, by this groove 115 (or pipe), will feed to vertical drainage part 101 (or pipe) from the interstitial water of consolidated subsoil A.At this moment, sealing part 102 is put into by gutter 19, in the groove 115 of delivery space water (or pipe).
In addition, to the water supply of the interstitial water of the inside of vertical supply passageway in example illustrated in figures 1 and 2, be natural water supply (draining), but, also can be in the inside of gutter 19, groove 115 (or pipe), pressurized tank or pump are set, interstitial water are supplied with forcibly the inside (discharge) of vertical supply passageway.
Pour into the water with sealing part 102 of inside of vertical supply passageway such as Fig. 1～shown in Figure 3, vertically wander the inside of the vertical drainage part 101 (or ported sub) of supply passageway in conduct, the impetus according to these current, by vertical drainage part 101 (or ported sub), outflow is diffused into across consolidated subsoil A and peripheral ground B and all high layer of sand of water permeability that forms, among organic soil layer C.
By from constituting the vertical drainage part 101 (or ported sub) of above-mentioned vertical suction path, outflow is diffused into the higher layer of sand of water permeability, the current of the inside of organic soil layer C carry, sealing part 102 is also wandered in the inside of the vertical drainage part 101 (or ported sub) that constitutes vertical supply passageway, outflow is diffused into the higher layer of sand of water permeability, the inside of organic soil layer C.
Outflow is diffused into the higher layer of sand of water permeability, and the part of the sealing part 102 of the inside of organic soil layer C is at layer of sand, and (according to the kind of sealing part, here imbibition) stagnated in the inside of organic soil layer C, forms the state that the part mesh stops up, the water flowing reduction.
Water with sealing part 102 concentrates on the higher layer of sand of water permeability that local mesh stops up, and the gap portion of organic soil layer C (not producing the part that mesh stops up) is post by this gap portion.In this process, sealing part 102 seals gap portion.
So, the layer of sand that water permeability is higher, the gap portion of organic soil layer C little by little seal by sealing part 102, soon just at Fig. 2, and Fig. 3 and the higher layer of sand of water permeability shown in Figure 5, the inside of organic soil layer C forms the sealing zone 107 that is formed by sealing part 102.
By this sealing zone 107, will be across the higher layer of sand of water permeability of the scope of consolidated subsoil A and peripheral ground B, the phreatic stream that organic soil layer C forms interrupts, and avoids the forced drainage along with ground stabilization, the situation that the underground water of peripheral ground B descends.
In addition, sealing part 102 also can adopt the form that is mixed with microorganism.In the occasion that adopts such sealing part 102, by sealing part 102, form after the sealing zone 107, microbial reproduction between the sealing part 102 that constitutes sealing zone 107, forms bacterium colony, strengthens this sealing part 102.
In addition, also can in water, add the nutritional labeling of microorganism with sealing part 102.At this moment, in the sealing part zone 107 of the inside that is formed at ground, has a large amount of nutritional labelings, improve the microorganism of the soil of the inside that is arranged in ground originally, or be mixed in the reproductive ability of the microorganism in the sealing part 102, go far towards the formation of the bacterium colony between the sealing part 102, the enhancing in sealing zone 107.
Below the described reinforced construction method of claim 15～30 is described.In addition, this reinforced construction method requires 1～9 described reinforced construction method identical with aforesaid right, in soft foundation, adopt vacuum pressure, form and the isolated reduced pressure zone of opening of consolidated subsoil periphery, discharge the interstitial water in the above-mentioned soft foundation, thus, with above-mentioned reinforced soft soil ground is the hard ground, and like this, the explanation is here omitted.In addition, for the kind of sealing part, sealing part input method to vertical supply passageway, since identical with the described reinforced construction method of aforesaid claim 1～9, so omit detailed description here.
At above-mentioned reinforced construction method, the invention is characterized in inside at above-mentioned periphery ground, form vertical supply passageway, the water that will have sealing part is circulated into the inside of this vertical supply passageway, on the other hand, between above-mentioned this vertical supply passageway and consolidated subsoil and/or the outside of above-mentioned vertical supply passageway, form the vertical drainage path, by this vertical drainage path, discharge the water of the ground inside of above-mentioned consolidated subsoil periphery.
As mentioned above, if carry out the densification dehydration of consolidated subsoil A, sucking-off acting in conjunction with the interstitial water of pressure differential, promote the densification sedimentation of consolidated subsoil A, then across the consolidated subsoil that should reinforce and peripheral ground, form the higher layer of sand of water permeability, during organic soil layer, also discharge the underground water of the ground of consolidated subsoil periphery forcibly.Thus, also have, cause the drawback of the situations such as sedimentation of weak peripheral ground because of this influence.
For fear of such situation, in reinforced construction method of the present invention, in peripheral ground,, form vertical supply passageway with prescribed distance, the inside at this vertical supply passageway pours into sealing part with water.Specifically,,,,, be the dotted line shape a plurality of vertical drainage parts 101 are set, form vertical supply passageway with prescribed distance in the inside of peripheral ground B around consolidated subsoil A as Fig. 7～shown in Figure 12.If the vertical drainage part 101 that is adopted can be along the depth direction of peripheral ground B, form the path of supplying with water and sealing part, then can be any type, specifically, can enumerate following type, wherein, be core with rectangular plastic wire, in the interior outside of this net, the filtration beds that the fibre plate by nonwoven, felt, fabric, braid etc. forms is set.At this moment, best, the filtration beds of vertical drainage part 101 is made of the fibre plate that width of mesh can make sealing part 102 pass through.
In addition, vertical supply passageway also can be made by following method, this method is: in the zone that is provided with outside the vertical drainage part 101, inside at peripheral ground B, has the pipe (ported sub) that sealing part can be realized a plurality of holes of seeing through along the depth direction setting, or, the layer of sand of column is set in the inside of peripheral ground B.
In addition, vertical supply passageway needn't necessarily form with prescribed distance according to the mode that centers on consolidated subsoil A according to the kind of peripheral ground B, can focus only on also that the underground water with peripheral ground B is followed ground stabilization and the part of the danger forcing to discharge.
Also have, best, vertical supply passageway forms according to the mode of separating with consolidated subsoil A as much as possible.Specifically, can according to consolidated subsoil A, separate slightly, such as, the mode of separating with the degree of 1～2m forms.
Also have, between the vertical supply passageway and consolidated subsoil of above-mentioned peripheral ground, and/or the outside of vertical supply passageway, form the vertical drainage path.In Fig. 7 and form shown in Figure 8, the vertical drainage path is according between vertical supply passageway (vertical drainage part 101) and consolidated subsoil A, with prescribed distance, is the dotted line shape and beats the mode of putting a plurality of vertical drainage parts 103 and form.
If the vertical drainage part 103 that is adopted can be along the depth direction of peripheral ground B, form drainage channel, then it can be any type, specifically, can enumerate following type, wherein, plastic wire that can be rectangular is a core, in the interior outside of this net, the filtration beds that is formed by fibre plates such as nonwoven, felt, fabric, braids is set.At this moment, best, the filtration beds of vertical drainage part 103 can not make sealing part 102 pass through by width of mesh, or the fibre plate that is difficult to pass through constitutes.In addition, the vertical drainage path also can form in the following manner, this mode is: the position outside the setting of vertical drainage part 103, inside at peripheral ground B, the pipe (ported sub) that has a plurality of holes that make the intransitable non-perforated pipe of sealing part or be difficult to pass through along the depth direction setting, or, the layer of sand of column is set in the inside of peripheral ground B.
In addition, the top at the vertical drainage part 103 that constitutes the vertical drainage path is connected with the horizontal drainage spare 104 that is communicated with vacuum pump 105, and its end face covers by inner liner 106.
In addition, as Fig. 9 and shown in Figure 10, inside at the vertical drainage part 101 that constitutes vertical supply passageway, pour into water with sealing part 102, and make vacuum pump 105 runnings, thus, water vertically flows down the inside of the vertical drainage part 101 of supply passageway in conduct, then shown in the arrow among Fig. 9 and Figure 10, in the intermediate layer that is positioned at peripheral ground B, the layer of sand that water permeability in the bottom layer is higher flows among organic soil layer C, in addition, be formed at the vertical drainage part 103 of the vertical drainage path between vertical supply passageway (vertical drainage part 101) and the consolidated subsoil A by formation, the zone of row outside ground.
Sealing part 102 is by from constituting the vertical drainage part 101 of above-mentioned vertical suction path, through constituting the higher layer of sand of water permeability, the vertical drainage part 103 of organic soil layer C and formation vertical drainage path, along the current that flow to outside the ground B, in the vertical drainage part 101 that constitutes vertical supply passageway, flow down, at the higher layer of sand of water permeability, the diffusion inside of organic soil layer C arrives the vertical drainage part 103 that constitutes the vertical drainage path.
A part that is contained in the sealing part 102 in the water is at the higher layer of sand of water permeability, and stagnate the inside of organic soil layer C, and at the higher layer of sand of water permeability, the inside of organic soil layer C forms the state that the part mesh stops up, the water flowing reduction.Water with sealing part 102 concentrates on the partly higher layer of sand of water permeability of mesh obstruction, and the gap portion of organic soil layer C (not producing the part that mesh stops up) is post by this gap portion.In this process, sealing part 102 stops up gap portion.
So, the layer of sand that water permeability is higher, the gap portion of organic soil layer C is by sealing part 102, little by little sealing, soon just at Figure 11 and the higher layer of sand of such water permeability shown in Figure 12, the inside of organic soil layer C forms the sealing zone 107 that is formed by sealing part 102.
By this sealing zone 107, will be by the higher layer of sand of water permeability across consolidated subsoil A and peripheral ground B, the phreatic stream that organic soil layer C forms is isolated, avoids following the forced drainage of ground stabilization, the situation that the underground water of peripheral ground B reduces.
On the other hand, across consolidated subsoil and peripheral ground, do not form the higher layer of sand of water permeability, the occasion of organic soil layer C, or be that the layer of sand that water-based is higher, the top of organic soil layer C have the occasion of middle grit layer D, even pass through under the situation of this centre grit layer D at water with sealing part 102, same as before along current, move to the vertical drainage part 103 that constitutes the vertical drainage path inside of grit layer D in the middle of sealing part 102 is not stranded in.
Inside at middle grit layer D, along with current, the sealing part 102 that moves in the inside of middle grit layer D can not be seen through by the sealing part 102 on the surface of vertical drainage part 103 or the filtration beds of the mesh degree that is difficult to see through stops, can't enter the inside of vertical drainage part 103, be attached on the surface of vertical drainage part 11, mesh taking place in the filtration beds on the surface of vertical drainage part 11 stop up,, forms sealing zone 107 here.
Be formed at 107 the vertical drainage parts 103 in sealing zone in the filtration beds on surface of vertical drainage part 103 by peripheral ground B side, prevention is across the phreatic mobile effect of the inside of the middle grit layer D of consolidated subsoil A and peripheral ground B, by this sealing zone 107, will be isolated by phreatic stream across the middle grit layer D inside of consolidated subsoil A and peripheral ground B, avoid forced drainage, the situation that the underground water of peripheral ground B reduces along with ground stabilization.
In Figure 13 and form shown in Figure 14, between the vertical supply passageway (vertical drainage part 101) and consolidated subsoil A of peripheral ground B, and the outside of vertical supply passageway (vertical drainage part 101), spacing according to the rules, be the dotted line shape a plurality of vertical drainage part 103a are set, 103b thus, forms the vertical drainage path.At vertical drainage part 103a, the head portion of 103b, connect and vacuum pump 105a, the horizontal drainage spare 104a that 105b is communicated with, 104b, these vertical drainage parts 103a, the head portion of 103b and with vacuum pump 105a, the horizontal drainage spare 104a that 105b is communicated with, the end face of 104b covers by inner liner 106.
In addition, inside at the vertical drainage part 101 that constitutes vertical supply passageway, pour into water with sealing part 102, and make and be connected in vertical drainage part 103a, the horizontal drainage spare 104a of the head portion of 103b, the vacuum pump 105a that 104b is communicated with, the 105b running, thus, water is shown in the arrow among Figure 13, vertically flow down the inside of the vertical drainage part 101 of supply passageway in conduct, then, by being positioned at the intermediate layer of peripheral ground B, the layer of sand that the water permeability of bottom layer is higher, organic soil layer C along the direction that constitutes the vertical drainage part 103a be formed at the vertical drainage path between vertical supply passageway (vertical drainage part 101) and the consolidated subsoil A, is formed at the vertical drainage part 103a of vertical drainage path in the outside of vertical supply passageway (vertical drainage part 101) with formation, the direction of 103b flows, respectively through constituting the vertical drainage part 103a of vertical drainage path, 103b, the zone of row outside ground B.
The sealing part 102 that has in water is by from constituting the vertical drainage part 101 of above-mentioned vertical suction path, through the higher layer of sand of water permeability, the vertical drainage part 103a of organic soil layer C and formation vertical drainage path, 103b along the current outside ground B, wanders in the inside of the vertical drainage part 101 that constitutes vertical supply passageway, at the higher layer of sand of water permeability, the diffusion inside of organic soil layer C arrives the vertical drainage part 103a that constitutes the vertical drainage path, 103b.
The part of sealing part 102 is at the higher layer of sand of water permeability, and stagnate the inside of organic soil layer C, and at the higher layer of sand of water permeability, the inside of organic soil layer C forms mesh blocked state partly, the water flowing reduction.Water with sealing part 102 concentrates on the partly higher layer of sand of water permeability of mesh obstruction, and the gap portion of organic soil layer C is post by this gap portion.In this process, sealing part 102 seals gap portion.
So, the layer of sand that water permeability is higher, the gap portion of organic soil layer C is by sealing part 102, little by little sealing is soon just in the higher layer of sand of water permeability as shown in figure 14, the inside of organic soil layer C, the sealing zone 107a that formation is formed by the sealing part 102 of imbibition, 107b.
Occasion in above-mentioned form, because sealing zone 107a, 107b is to be formed at the higher layer of sand of water permeability across the scope of consolidated subsoil A and peripheral ground B, the inside of organic soil layer C than big width, so more positively will be at layer of sand, the phreatic stream that flows among organic soil layer C is isolated.
Figure 15 and Figure 16 are illustrated in the outside of vertical supply passageway, form the form of vertical drainage path.In Figure 15 and form shown in Figure 16, the vertical drainage path forms by following manner, and this mode is: the outside at vertical supply passageway (vertical drainage part 101) with prescribed distance, is the dotted line shape a plurality of vertical drainage parts 103 is set.
If the vertical drainage part 103 that is adopted can be along the depth direction of peripheral ground B, form drainage channel, specifically, can enumerate following type, wherein, with rectangular plastic wire is core, in the interior outside of this net, the filtration beds that the fibre plate by nonwoven, felt, fabric, braid etc. forms is set.In this occasion, best, the filtration beds of vertical drainage part 101 can not be seen through by sealing part 102 or the fibre plate of the mesh degree that is difficult to see through constitutes.In addition, the vertical drainage path also can form like this, promptly, zone outside the setting of vertical drainage part 103, in the inside of peripheral ground B,, the pipe (ported sub) in a plurality of holes that have the non-perforated pipe of sealing part impermeable or be difficult to see through is set along depth direction, or, the layer of sand of column is set in the inside of peripheral ground B.
In addition, the top at the vertical drainage part 103 that constitutes the vertical drainage path is connected with the horizontal drainage spare 104 that is communicated with vacuum pump 105, and its end face covers by inner liner 106.
In addition, as Figure 15 and shown in Figure 16, inside at the vertical drainage part 101 that constitutes vertical supply passageway, pour into water with sealing part 102, and make vacuum pump 105 runnings, thus, water is shown in the arrow among Figure 15, vertically wander the inside of the vertical drainage part 101 of supply passageway in conduct, then, in the intermediate layer that is positioned at peripheral ground B, the layer of sand that the water permeability in the bottom layer is higher flows among organic soil layer C, in addition, be formed at the vertical drainage part 11 of vertical supply passageway of the inside of consolidated subsoil A by formation, and the vertical drainage part 103 that constitutes the vertical drainage path in the outside that is formed at vertical supply passageway (vertical drainage part 101), the place of row outside ground.
The sealing part 102 that has in the water is by from constituting the vertical drainage part 101 of above-mentioned vertical suction path, through constituting the higher layer of sand of water permeability, organic soil layer C, constitute the vertical drainage part 11 of the vertical drainage path of the inside that is formed at consolidated subsoil A, and the vertical drainage part 103 that constitutes the vertical drainage path, flow to outside the consolidated subsoil A and peripheral ground B outside current carry, in the vertical drainage part 101 that constitutes vertical supply passageway, wander, at the higher layer of sand of water permeability, the diffusion inside of organic soil layer C, arrive the vertical drainage part 11,103 that constitutes the vertical drainage path.
The part of sealing part 102 is at the higher layer of sand of water permeability, and stagnate the inside of organic soil layer C, and at the higher layer of sand of water permeability, the inside of organic soil layer C forms the state that the part mesh stops up, the water flowing reduction.Water with sealing part 102 concentrates on the partly higher layer of sand of water permeability of mesh obstruction, and the gap portion of organic soil layer C (not producing the part that mesh stops up) is post by this gap portion.In this process, sealing part 102 stops up gap portion.
So, the layer of sand that water permeability is higher, the gap portion of organic soil layer C little by little seal by sealing part 102, and soon just at the higher layer of sand of water permeability as shown in figure 16, the inside of organic soil layer C forms the sealing zone 107 that is formed by sealing part 102.
By this sealing zone 107, will be by the higher layer of sand of water permeability across consolidated subsoil A and peripheral ground B, the phreatic stream that organic soil layer C forms cuts off, and avoids the forced drainage along with ground stabilization, the situation that the underground water of peripheral ground B reduces.
On the other hand, across consolidated subsoil A and peripheral ground B, do not form the higher layer of sand of water permeability, organic soil layer C, perhaps at the higher layer of sand of water permeability, the top of organic soil layer C, occasion with middle grit layer D, even the water with sealing part 102 is by under the situation of this centre grit layer D, the inside of grit layer D in the middle of sealing part 102 is not stranded in yet, along with current, the vertical drainage part 11 of the vertical drainage path in constituting consolidated subsoil A moves with the vertical drainage part 103 that constitutes the vertical drainage path among the peripheral ground B same as before.
Inside at middle grit layer D, along with current, the sealing part 102 that moves in the inside of middle grit layer D can not be seen through by the sealing part 102 on the surface of the vertical drainage part 11,103 that constitutes the vertical drainage path or the filtration beds of the mesh degree that is difficult to see through stops, can't enter vertical drainage part 11,103 inside is attached on the surface of vertical drainage part 11,103, in the filtration beds on the surface of vertical drainage part 11, produce the obstruction of mesh,, form sealing zone 107 here.
107 in the sealing zone of filtration beds on surface that is formed at vertical drainage part 103 is by the vertical drainage part 11 of consolidated subsoil A side and the vertical drainage part 103 of peripheral ground B side, prevention is across the phreatic mobile effect of the inside of the middle grit layer D of consolidated subsoil A and peripheral ground B, by sealing zone 107, will be isolated across the phreatic stream of the inside of the scope of the middle grit layer D of consolidated subsoil A and peripheral ground B, avoid forced drainage, the situation that the underground water B of peripheral ground B reduces along with ground stabilization.
Also have, the given example of above-mentioned embodiment only is simple illustrated example, such as, can be according to the kind of the ground of consolidated subsoil periphery B, around consolidated subsoil periphery B, according to 2 weights, 3 reset and put with the construction line of vertical drainage path, can in the scope of claims record, freely change.
Claims (30)
1. the reinforced construction method of a soft foundation, wherein, inside at the soft foundation of being reinforced (hereinafter referred to as " consolidated subsoil "), utilize vacuum pressure, form the reduced pressure zone of keeping apart with the consolidated subsoil periphery, discharge the interstitial water in the above-mentioned consolidated subsoil, it is the hard ground that above-mentioned consolidated subsoil is reinforced, and it is characterized in that:
Inside at the ground of above-mentioned consolidated subsoil and/or consolidated subsoil periphery, form vertical supply passageway, the water that will have sealing part is circulated into the inside of this vertical supply passageway, by this vertical supply passageway, in the inside of the ground of consolidated subsoil and/or consolidated subsoil periphery, supply with water with sealing part.
2. the reinforced construction method of soft foundation according to claim 1, the water that it is characterized in that having sealing part is the hydrophilic gel liquid suspension.
3. the reinforced construction method of soft foundation according to claim 2 is characterized in that hydrophilic colloid is formed by the polysaccharide ester.
4. the reinforced construction method of soft foundation according to claim 3 is characterized in that the polysaccharide ester is for being the ester class of principal component with CMC or mosanom.
5. the reinforced construction method of soft foundation according to claim 1, it is characterized in that sealing part be select chaff class, shell class, starch, clay, cement and the high water absorbency polymer from sawdust, wood powder, husk, grain dust, cereal more than a kind or 2 kinds.
6. the reinforced construction method of soft foundation according to claim 5 is characterized in that in having the water of sealing part, adds the nutritional labeling of microorganism.
7. the reinforced construction method of soft foundation according to claim 1, it is characterized in that sealing part be from chaff class, shell class, starch, clay, cement and the high water absorbency polymer of sawdust, wood powder, husk, grain dust, cereal, select more than a kind or 2 kinds in be mixed with the mixture of microorganism.
8. the reinforced construction method of soft foundation according to claim 1 is characterized in that having the sealing part case of water of sealing part from storage, by supply pipe, to the inside of vertical supply passageway, supplies with the water with above-mentioned sealing part.
9. the reinforced construction method of soft foundation according to claim 8, it is characterized in that inside at vertical supply passageway, floating type flap valve is set, along with from the sealing part case, the excess supply of the water of supplying with by supply pipe with sealing part interrupts the supply to the water with sealing part of the inside of vertical supply passageway.
10. the reinforced construction method of soft foundation according to claim 1, it is characterized in that inside at the ground of consolidated subsoil and/or consolidated subsoil periphery, the vertical drainage part that the surperficial filtration beds that sealing part is passed through by width of mesh constitutes is set, forms vertical supply passageway.
11. the reinforced construction method of soft foundation according to claim 1 is characterized in that in the inside of the ground of consolidated subsoil and/or consolidated subsoil periphery, has the pipe in a plurality of holes that sealing part can pass through along the depth direction setting.
12. the reinforced construction method of soft foundation according to claim 1 is characterized in that the water with sealing part is the interstitial water from consolidated subsoil.
13. the reinforced construction method of soft foundation according to claim 12 is characterized in that the top ends at vertical supply passageway, is connected with the groove or the pipe that link to each other with the drainage channel of the interstitial water of consolidated subsoil.
14. reinforced construction method according to claim 12 or 13 described soft foundations, it is characterized in that around the head portion of vertical drainage part or pipe, the layer that setting is formed by grit or roughing sand in the layer that is formed by grit or roughing sand, pours into the water with sealing part.
15. the reinforced construction method of a soft foundation, wherein, in the inside of consolidated subsoil, utilize vacuum pressure, form the reduced pressure zone of keeping apart, discharge the interstitial water in the above-mentioned consolidated subsoil with the consolidated subsoil periphery, it is the hard ground that above-mentioned consolidated subsoil is reinforced, and it is characterized in that:
Inside at the ground of above-mentioned consolidated subsoil periphery, form vertical supply passageway, the water that will have sealing part is circulated into the inside of this vertical supply passageway, on the other hand, between above-mentioned this vertical supply passageway and consolidated subsoil and/or the outside of above-mentioned vertical supply passageway, form the vertical drainage path,, discharge the water of the ground inside of above-mentioned consolidated subsoil periphery by this vertical drainage path.
16. the reinforced construction method of soft foundation according to claim 15 is characterized in that in the inside of the ground of consolidated subsoil periphery, is the dotted line shape and forms vertical supply passageway.
17. the reinforced construction method of soft foundation according to claim 15 is characterized in that being the dotted line shape and forming the vertical drainage path between vertical supply passageway and consolidated subsoil.
18. the reinforced construction method of soft foundation according to claim 15, the water that it is characterized in that having sealing part is the hydrophilic gel liquid suspension.
19. the reinforced construction method of soft foundation according to claim 18 is characterized in that hydrophilic colloid is formed by the polysaccharide ester.
20. the reinforced construction method of soft foundation according to claim 19 is characterized in that the polysaccharide ester is for being the ester class of principal component with CMC or mosanom.
21. the reinforced construction method of soft foundation according to claim 15, it is characterized in that sealing part be select chaff class, shell class, starch, clay, cement and the high water absorbency polymer from sawdust, wood powder, husk, grain dust, cereal more than a kind or 2 kinds.
22. the reinforced construction method of soft foundation according to claim 21 is characterized in that in having the water of sealing part, adds the nutritional labeling of microorganism.
23. the reinforced construction method of soft foundation according to claim 15, it is characterized in that sealing part be from chaff class, shell class, starch, clay, cement and the high water absorbency polymer of sawdust, wood powder, husk, grain dust, cereal, select more than a kind or 2 kinds in be mixed with the mixture of microorganism.
24. the reinforced construction method of soft foundation according to claim 15 is characterized in that having the sealing part case of water of sealing part from storage, by supply pipe, to the inside of vertical supply passageway, supplies with the water with above-mentioned sealing part.
25. the reinforced construction method of soft foundation according to claim 24, it is characterized in that inside at vertical supply passageway, floating type flap valve is set, along with from the sealing part case, the excess supply of the water of supplying with by supply pipe with sealing part interrupts the supply to the water with sealing part of the inside of vertical supply passageway.
26. the reinforced construction method of soft foundation according to claim 15 is characterized in that establishing the vertical drainage part that the surperficial filtration beds that sealing part is passed through by width of mesh constitutes greatly, forms vertical supply passageway.
27. the reinforced construction method of soft foundation according to claim 15 is characterized in that setting the surface and by width of mesh sealing part can not be passed through, or the vertical drainage part of the filtration beds that is difficult to pass through formation, forms the vertical drainage path.
28. the reinforced construction method of soft foundation according to claim 15 is characterized in that the water with sealing part is the interstitial water from consolidated subsoil.
29. the reinforced construction method of soft foundation according to claim 28 is characterized in that the top ends at vertical supply passageway, is connected with the groove or the pipe that are connected with the drainage channel of the interstitial water of consolidated subsoil.
30. reinforced construction method according to claim 28 or 29 described soft foundations, it is characterized in that around the head portion of vertical drainage part or pipe, the layer that setting is formed by grit or roughing sand in the layer that is formed by grit or roughing sand, pours into the water with sealing part.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP149950/2004 | 2004-05-20 | ||
| JP2004149950 | 2004-05-20 | ||
| JP258081/2004 | 2004-09-06 | ||
| JP313239/2004 | 2004-10-28 | ||
| JP340276/2004 | 2004-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1957143A true CN1957143A (en) | 2007-05-02 |
| CN100570071C CN100570071C (en) | 2009-12-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561307A (en) * | 2012-01-04 | 2012-07-11 | 河海大学 | Clogging preventing method for drainage channel based on underground high-flow-capacity drainage system |
| CN105672245A (en) * | 2016-01-21 | 2016-06-15 | 上海强劲地基工程股份有限公司 | Method for forming high-strength cement soil body in flow plasticity soft soil |
| CN108761044A (en) * | 2018-08-13 | 2018-11-06 | 重庆科技学院 | The experimental rig and method of microorganism induction precipitation of calcium carbonate solidification sand under a kind of subnormal ambient |
| CN113668502A (en) * | 2021-07-13 | 2021-11-19 | 中铁十九局集团第五工程有限公司 | Method for improving expansive soil |
-
2005
- 2005-05-18 CN CNB2005800162306A patent/CN100570071C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561307A (en) * | 2012-01-04 | 2012-07-11 | 河海大学 | Clogging preventing method for drainage channel based on underground high-flow-capacity drainage system |
| CN102561307B (en) * | 2012-01-04 | 2014-09-10 | 河海大学 | Clogging preventing method for drainage channel based on underground high-flow-capacity drainage system |
| CN105672245A (en) * | 2016-01-21 | 2016-06-15 | 上海强劲地基工程股份有限公司 | Method for forming high-strength cement soil body in flow plasticity soft soil |
| CN105672245B (en) * | 2016-01-21 | 2018-04-03 | 上海强劲地基工程股份有限公司 | Flow the method that the high strength cement soil body is formed in plasticity weak soil |
| CN108761044A (en) * | 2018-08-13 | 2018-11-06 | 重庆科技学院 | The experimental rig and method of microorganism induction precipitation of calcium carbonate solidification sand under a kind of subnormal ambient |
| CN113668502A (en) * | 2021-07-13 | 2021-11-19 | 中铁十九局集团第五工程有限公司 | Method for improving expansive soil |
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| Publication number | Publication date |
|---|---|
| CN100570071C (en) | 2009-12-16 |
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