CN103046534B - Method for improving bearing capacity of foundation - Google Patents
Method for improving bearing capacity of foundation Download PDFInfo
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- CN103046534B CN103046534B CN201210589847.9A CN201210589847A CN103046534B CN 103046534 B CN103046534 B CN 103046534B CN 201210589847 A CN201210589847 A CN 201210589847A CN 103046534 B CN103046534 B CN 103046534B
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Abstract
The invention discloses a method for improving bearing capacity of a foundation. A vacuum preloading technology is organically combined with a grouting technology, a vacuum pump in a vacuum drainage system is utilized, a vacuum state is formed in a stratum of a soft foundation, technical conditions for vacuum preloading are reached by controlling vacuum degree in the stratum, and configured grout is grouted into the stratum at right time. On one hand, since vacuum is fully utilized to cause negative stratum pressure, the grout is prone to leaking into the stratum within a controlled time, spaces for pore water (which is drained by vacuum drainage) of the stratum are filled, and strength of the grout is increased after consolidation, so that the bearing capability of the foundation can be effectively improved, consolidation settlement caused by vacuum stratum dehydration can be reduced at the same time, consolidation speed can be effectively increased, and processing efficiency can be improved; and on the other hand, since the vacuum stratum state is utilized, the grout is prone to leaking into the stratum, and energy consumption is reduced.
Description
Technical field
The present invention relates to a kind of foundation treatment technology, especially relate to a kind of method that improves bearing capacity of foundation soil, the method is applicable to process the soft foundation on a large scale such as polder saturated dredger soft soil, training of river channel mud.
Background technology
The feature of the soft base of polder is that water content is large, and soil body particle is thin, and mobility is strong, mainly with mucky soil, is main, and engineering properties is poor.The self property of weak soil has determined that it need to could be as the ground of engineering construction after consolidation process.
Current existing a lot of methods that improve load-carrying capacity of soft soil foundations, but because polder region area is large, processing requirements is high, a lot of existing soft-soil foundation treatment methods are difficult to solve the problem as the soft base of polder etc.At present, the common method for the treatment of the soft base of polder is mainly vacuum method, although the method treatment effeciency is higher, treatment effect is often very poor, is difficult to reach the foundation condition of road that engine request is higher, middle-high building thing, heavy factory building, warehouse district etc.; On the other hand, the time of the method Ground Treatment is longer, affect the development rate in later stage, and cost is high.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method that improves bearing capacity of foundation soil, and the method treatment effeciency is high, and can effectively improve foundation strength.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of method that improves bearing capacity of foundation soil, is characterized in that comprising the following steps:
1. in pending soft foundation, build low-pressure drainage system and grouting system, then on the surface of pending soft foundation, lay one deck and cover bed course, then cover thin film on covering bed course;
The bearing capacity that 2. will reach according to the ground after consolidation process, selects grouting agent, then makes slurries;
3. utilize vacuum method, by low-pressure drainage system, soft foundation is carried out to draining processing, the settling amount of relative pressure in drainage procedure in Real-Time Monitoring low-pressure drainage system and the relative pressure in grouting system, the water yield of discharging from soft foundation, soft foundation every day, so that the time started of controlled grouting and grouting amount;
4. during be less than or equal to-30kPa of the relative pressure in grouting system or when the settling amount of soft foundation every day surpasses 10mm, by grouting system, in soft foundation, pour into slurries, in filling process, when the slurries amount of pouring into is less than the water yield of discharging from soft foundation, increase the relative pressure of grouting;
5. when the water yield of discharging reaches estimate, improve the relative pressure in low-pressure drainage system from soft foundation, and increase the relative pressure of grouting, slurries infiltration capacity is strengthened.
Described step detailed process is 1.:
1.-1, the structure of low-pressure drainage system: plug many row's vertical drainage plates in pending soft foundation, every row's vertical drainage plate comprises a plurality of vertical drainage plates; Then on the surface of pending soft foundation, lay many horizontal drain pipes, every horizontal drain pipe forms drainage channel with many row's vertical drainage plates; On many horizontal drain pipes, jointly connect again one for discharging the vacuum pump of the water and air of soft foundation;
1.-2, the structure of grouting system: plug many vertical grout pipes in pending soft foundation, when plugging vertical grout pipe, require spacing between each vertical drainage plate of every vertical grout pipe and its periphery for equidistantly, and require along a plurality of grout outlets of its axial distribution, to be positioned on every vertical grout pipe the middle and lower part of pending soft foundation; Then on the surface of pending soft foundation, lay many plasm pouring in plane pipes, and make the plasm pouring in plane pipe formation grouting channel that is connected with many vertical grout pipes; On the link of plasm pouring in plane pipe and vertical grout pipe, be connected one for measuring the pressure vacuum gauge of the relative pressure in grouting system again; Finally on the grouting mouth of many plasm pouring in plane pipes, jointly connect one for pouring into the grout pump of slurries;
1.-3, on the surface of pending soft foundation, lay one deck and cover bed course, and make to cover bed course and cover all horizontal drain pipes and all plasm pouring in plane pipes;
1.-4, on covering bed course, cover thin film, and the edge of film is carried out to vacuum state under encapsulation process formation film.
In the building process of described low-pressure drainage system, the spacing between the vertical drainage plate described in adjacent two is 0.9m～2.0m.
The thickness of the described covering bed course in described step 1.-3 be more than or equal to described horizontal drain pipe or described plasm pouring in plane pipe 2 times of external diameter or more than; The sand covering bed course that described covering bed course forms as material for adopting sand.
In described step 1.-4, on covering bed course, before cover film, in the surperficial processing region surrounding of pending soft foundation, offer the trench that the degree of depth is greater than 1m, for the border of the edge seal as film.
The described step 2. selection course of middle grouting agent is: if the bearing capacity that the foundation requirement after consolidation process reaches is for being more than or equal to 60kN/m
2and be less than or equal to 70kN/m
2, select high strength clay class grouting agent; If the bearing capacity that the foundation requirement after consolidation process reaches is for being greater than 70kN/m
2, select cement-based grouting material.
Described cement-based grouting material is cement-fly ash or cement-slag mixture.
When described step starts to pour into slurries in soft foundation in 4., controlling grout pump makes the relative pressure of grouting be greater than 0Pa and be less than or equal to 0.5MPa; In filling process, when the slurries amount of pouring into is less than the water yield of discharging from soft foundation, controlled grouting pump increases the relative pressure of grouting, and guarantees that the relative pressure of the grouting after increase is no more than 1.0MPa.
The estimate of described step in 5. depends on the water content in untreated front soft foundation, water content in untreated front soft foundation is 60% when above, estimate be in untreated front soft foundation the water yield 50%～70%, water content in untreated front soft foundation is 60% when following, estimate be in untreated front soft foundation the water yield 40%～50%.
Described step 5. in vacuum pump in low-pressure drainage system while quitting work, controlled grouting pump makes the relative pressure of grouting increase to maximum value.
Compared with prior art, the invention has the advantages that: the inventive method has organically combined technique of soft soil foundation treatment and grouting technique, utilize the vacuum pump in low-pressure drainage system, in the stratum of soft foundation, form vacuum state, then by controlling the vacuum in stratum, reach the technical condition of vacuum preloading, at reasonable time, start to pour into the slurries that configure in stratum again, on the one hand, owing to taking full advantage of vacuum, cause stratum negative pressure, make slurries penetrate into relatively easily in stratum within the control time, filled by the occupied space of formation pore water (because vacuum drainage runs off), through solidifying after fixed, improved intensity, thereby effectively improved the bearing capacity of soft foundation, can reduce the consolidation settlement that stratum vacuum dehydration causes simultaneously, and can effectively accelerate consolidation rate, improve treatment effeciency, on the other hand, owing to having utilized vacuum state in stratum, slurries can penetrate in stratum easily, have reduced energy consumption.In addition, the inventive method can be used for processing the ground of any character, and for the large-scale soft foundation such as polder saturated dredger soft soil, training of river channel mud, treatment effect is particularly remarkable.
Accompanying drawing explanation
Fig. 1 is the laying schematic diagram one of low-pressure drainage system and grouting system in the inventive method;
Fig. 2 is the laying schematic diagram two of low-pressure drainage system and grouting system in the inventive method.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
A kind of method that improves bearing capacity of foundation soil that the present invention proposes, it organically combines technique of soft soil foundation treatment and soft base grouting technique, and it specifically comprises the following steps:
1. as shown in the figure, in pending soft foundation 1, build low-pressure drainage system and grouting system, then on the surface of pending soft foundation 1, lay one deck and cover bed course 2, then cover thin film 3 on covering bed course 2.The detailed process of this step is:
1.-1, the structure of low-pressure drainage system: as shown in the figure, plug many row's vertical drainage plates in pending soft foundation 1, every row's vertical drainage plate comprises a plurality of vertical drainage plates 41; Then on the surface of pending soft foundation 1, lay many horizontal drain pipes 42, every horizontal drain pipe 42 is connected with at least one row's vertical drainage plate; On the drain pipe port of many horizontal drain pipes 42, jointly connect again one for discharging the vacuum pump 43 of the water and air of soft foundation 1.Suppose to be inserted with eight row's vertical drainage plates in pending soft foundation, and every row's vertical drainage plate comprises ten vertical drainage plates, can lay many horizontal drain pipes, and a horizontal drain pipe can connect and compose a drainage channel with many rows vertical drainage plate, suppose to be laid with four horizontal drain pipes, can make every horizontal drain pipe and two row's vertical drainage plates connect and compose a drainage channel, again according to the vacuum pump of selecting, can jointly connect using two horizontal drain pipes as Yi Ge unit a vacuum pump, so just need two vacuum pumps.
At this, because the inventive method has been introduced grouting technique, and adopted pressure grouting, therefore the spacing between adjacent two vertical drainage plates can suitably strengthen, to save construction costs, to accelerate speed of application, in the present embodiment, in the building process of low-pressure drainage system, the spacing between can adjacent two vertical drainage plates is set to 0.9m～2.0m.And in actual the procedures of establishment, should determine the spacing between adjacent two vertical drainage plates according to the transmission coefficient of soft foundation, generally the transmission coefficient of soft foundation hour, spacing between adjacent two vertical drainage plates is also programmable relatively a little bit smaller, as transmission coefficient hour, spacing can be designed to 0.9m, when transmission coefficient is larger, spacing can be designed to 2.0m, usually can be designed to 1.5m.
1.-2, the structure of grouting system: as shown in the figure, in pending soft foundation 1, plug many vertical grout pipes 51, when plugging vertical grout pipe 51, require spacing between each vertical drainage plate 41 of every vertical grout pipe 51 and its periphery for equidistantly, if waiting to plug the periphery of the position of vertical grout pipe 51 has and is four vertical drainage plates 41 that square is arranged, require this vertical grout pipe 51 to be plugged on the center of four vertical drainage plates 41, if wait to plug the periphery of the position of vertical grout pipe 51, there are three vertical drainage plates 41 of arranging triangular in shape, require this vertical grout pipe 51 to be plugged on the center of three vertical drainage plates 41, and require along a plurality of grout outlets of its axial distribution, to be positioned on every vertical grout pipe 51 middle and lower part of pending soft foundation 1, can fully improve the intensity of the middle and lower part of soft foundation like this, then on the surface of pending soft foundation 1, lay many plasm pouring in plane pipes 52, and make a plasm pouring in plane pipe 52 formation grouting channel that is connected with many vertical grout pipes 51, on the link of plasm pouring in plane pipe 52 and vertical grout pipe 51, be connected one for measuring the pressure vacuum gauge 53 of the relative pressure in vertical grout pipe 51 again, finally on the grouting mouth of many plasm pouring in plane pipes 52, connect one for pouring into the grout pump 56 of slurries.Suppose to be inserted with eight row's vertical drainage plates in pending soft foundation, and every row's vertical drainage plate comprises ten vertical drainage plates, can between four adjacent vertical drainage plates of every two rows, plug a vertical grout pipe, there is so the vertical grout pipe of seven rows, and the vertical grout pipe of every row comprises nine vertical grout pipes, can lay so many plasm pouring in plane pipes, and a plasm pouring in plane pipe can connect and compose a grouting channel with the vertical grout pipe of many rows, suppose to be laid with three plasm pouring in plane pipes, can make wherein two plasm pouring in plane pipes connect and compose two grouting channel with the vertical grout pipe of two rows respectively, the 3rd remaining vertical grout pipe of three rows of plasm pouring in plane Guan Keyu connects and composes a grouting channel, again according to the grout pump of selecting, can jointly connect using two plasm pouring in plane pipes as Yi Ge unit a grout pump, another root plasm pouring in plane pipe connects a grout pump as Yi Ge unit, so just need two grout pumps.
In practice of construction process, while plugging vertical grout pipe 51, can vertical grout pipe 51 be plugged on the centre position of a plurality of vertical drainage plates 41 according to range estimation, make the pitch difference between the vertical grout pipe 51 of insertion and each vertical drainage plate 41 of its periphery few consistent.
At this, pressure vacuum gauge 53 is generally connected on the link of vertical grout pipe 51 and plasm pouring in plane pipe 52, in practice of construction process, pressure vacuum gauge 53 can be connected in to the slurries entrance of vertical grout pipe 51, this is because in practice of construction process, the slurries amount inculcated is large and slurries fed distance is far away, simultaneously different project situation there are differences, carry in way and have pressure loss, therefore vertically the relative pressure of the slurries entrance of grout pipe as control criterion.
1.-3, as shown in the figure, on the surface of pending soft foundation 1, lay one deck and cover bed course 2, and make to cover bed course 2 and cover all horizontal drain pipes 42 and all plasm pouring in plane pipes 52.
In this specific embodiment, if each vertical drainage plate 41 is with together with horizontal drain pipe 42 binds with its formation drainage channel, the water major part that each vertical drainage plate 41 is discharged directly enters in horizontal drain pipe 42, and fraction water enters in horizontal drain pipe 42 by covering a plurality of water inlets along its axial distribution on bed course 2 and horizontal drain pipe 42; If each vertical drainage plate 41 and horizontal drain pipe 42 with its formation drainage channel be not together with bind, the water that each vertical drainage plate 41 is discharged all enters in horizontal drain pipe 42 by covering a plurality of water inlets along its axial distribution on bed course 2 and horizontal drain pipe 42, at this, covers the effect that bed course 2 has played infiltration; Meanwhile, with covering bed course 2, cover horizontal drain pipe 42 and plasm pouring in plane pipe 52, can prevent that horizontal drain pipe 42 and plasm pouring in plane pipe 52 from poking film 3, at this, cover the effect that bed course 2 has played protective film 3.
In this specific embodiment, covering bed course 2 generally can select sand to form sand covering bed course as material, it is not only economical that sand covers bed course, and permeability performance is good, certainly in practice of construction process, also can adopt mud or haydite to form and cover bed course as material, but it is poor compared with the permeability performance of sand covering bed course that mud covers the permeability performance of bed course, and the price comparison of haydite covering bed course is high.
In this specific embodiment, the thickness that require to cover bed course 2 be more than or equal to horizontal drain pipe 42 or plasm pouring in plane pipe 52 2 times of external diameter or more than, so just can cover horizontal drain pipe 42 and plasm pouring in plane pipe 52 completely by effective ensuring coverage bed course 2.
1.-4, in the surperficial processing region surrounding of pending soft foundation 1, offer the trench 6 that the degree of depth is greater than 1m, then on covering bed course 2, cover thin film 3, as shown in the figure, and utilize trench 6, as the border of the edge seal of film 3, the edge of film 3 is carried out to encapsulation process to form vacuum state under film.
In practice of construction process, it is too shallow that trench 6 should not dig, because if too shallow, the edge of film 3 is easily run out of, and so just cannot guarantee under film in vacuum state.
The bearing capacity that 2. will reach according to the ground after consolidation process, the grouting agent of selection economical rationality, then makes slurries.
At this, because the general organic content of tidal land barged-in fill is high, utilize the bearing capacity of foundation soil after vacuum method is processed not high (generally lower than 60kN/m
2), therefore according to the purposes of the ground after consolidation process (such as: as stockyard, road foundation, park, land use for greening etc.), select suitable grouting agent.For requiring not too high ground (to be more than or equal to 60kN/m as park, land use for greening equivalent-load power
2and be less than or equal to 70kN/m
2), can select high strength clay class grouting agent; For the ground of having relatively high expectations as stockyard, road foundation equivalent-load power, (be greater than 70kN/m
2), optional with cement-based grouting material, as cement-fly ash, cement-slag mixture etc.
At this, the preparation of slurries adopts prior art, and the configuration proportion of slurries can be determined according to actual conditions.
3. utilize existing vacuum method, by low-pressure drainage system, soft foundation is carried out to draining processing, the settling amount of relative pressure in drainage procedure in Real-Time Monitoring low-pressure drainage system and the relative pressure in grouting system, the water yield of discharging from soft foundation, soft foundation every day, so that time started and the grouting amount of the grouting of controlled grouting pump.
4. during the be less than or equal to-30kPa of relative pressure at the link place of the vertical grout pipe in grouting system and plasm pouring in plane pipe, by the grout pump in grouting system, plasm pouring in plane pipe and vertical grout pipe, in soft foundation, pour into slurries, and controlled grouting pump makes the relative pressure of the link place grouting of vertical grout pipe and plasm pouring in plane pipe be greater than 0Pa and be less than or equal to 0.5MPa; But when the settling amount of soft foundation starts to accelerate when the settling amount of soft foundation every day surpasses 10mm, even the be greater than-30kPa of relative pressure at vertical grout pipe and the link place of plasm pouring in plane pipe also should by the grout pump in grouting system, plasm pouring in plane pipe and vertically grout pipe in soft foundation, pour into slurries.In filling process when slurries infiltrate when slower when the slurries amount of pouring into is less than the water yield of discharging from soft foundation, can control grout pump suitably increases the relative pressure (relative pressure of the grouting after increase is generally no more than 1.0MPa) of the link place grouting of vertical grout pipe and plasm pouring in plane pipe, to accelerate filling speed, to reduce the settling amount on stratum.
5. when the water yield of discharging from soft foundation reaches estimate, the relative pressure that should suitably improve the vacuum pump in low-pressure drainage system (can suspend partial vacuum pump in specific implementation process, make like this relative pressure in soft foundation naturally raise, object is in order not produce the native phenomenon of arch), and controlled grouting pump makes the relative pressure of link place grouting of vertical grout pipe and plasm pouring in plane pipe more than 0.5MPa, slurries infiltration capacity is strengthened, after vacuum pump in low-pressure drainage system quits work, can control relative pressure that grout pump makes the link place grouting of vertical grout pipe and plasm pouring in plane pipe and be increased to maximum value (according to the formation condition of soft foundation with process the parameters such as the degree of depth and determine, can control if desired grout pump makes the relative pressure of the link place grouting of vertical grout pipe and plasm pouring in plane pipe surpass 1MPa, maximum value when this maximum value is encircleed native phenomenon for not producing).
At this, the occurrence of estimate is to determine according to the water content of soft foundation, and generally, during the water content of soft foundation higher (more than 60%), estimate can be set to 50%～70% left and right of the water yield in untreated front soft foundation; During the water content lower (below 60%) of soft foundation, estimate can be set to 40%～50% left and right of the water yield in untreated front soft foundation.
Claims (9)
1. improve a method for bearing capacity of foundation soil, it is characterized in that comprising the following steps:
1. in pending soft foundation, build low-pressure drainage system and grouting system, then on the surface of pending soft foundation, lay one deck and cover bed course, then cover thin film on covering bed course;
Described step detailed process is 1.:
1.-1, the structure of low-pressure drainage system: plug many row's vertical drainage plates in pending soft foundation, every row's vertical drainage plate comprises a plurality of vertical drainage plates; Then on the surface of pending soft foundation, lay many horizontal drain pipes, every horizontal drain pipe forms drainage channel with many row's vertical drainage plates; On many horizontal drain pipes, jointly connect again one for discharging the vacuum pump of the water and air of soft foundation;
1.-2, the structure of grouting system: plug many vertical grout pipes in pending soft foundation, when plugging vertical grout pipe, require spacing between each vertical drainage plate of every vertical grout pipe and its periphery for equidistantly, and require along a plurality of grout outlets of its axial distribution, to be positioned on every vertical grout pipe the middle and lower part of pending soft foundation; Then on the surface of pending soft foundation, lay many plasm pouring in plane pipes, and make the plasm pouring in plane pipe formation grouting channel that is connected with many vertical grout pipes; On the link of plasm pouring in plane pipe and vertical grout pipe, be connected one for measuring the pressure vacuum gauge of the relative pressure in grouting system again; Finally on the grouting mouth of many plasm pouring in plane pipes, jointly connect one for pouring into the grout pump of slurries;
1.-3, on the surface of pending soft foundation, lay one deck and cover bed course, and make to cover bed course and cover all horizontal drain pipes and all plasm pouring in plane pipes;
1.-4, on covering bed course, cover thin film, and the edge of film is carried out to vacuum state under encapsulation process formation film;
The bearing capacity that 2. will reach according to the ground after consolidation process, selects grouting agent, then makes slurries;
3. utilize vacuum method, by low-pressure drainage system, soft foundation is carried out to draining processing, the settling amount of relative pressure in drainage procedure in Real-Time Monitoring low-pressure drainage system and the relative pressure in grouting system, the water yield of discharging from soft foundation, soft foundation every day, so that the time started of controlled grouting and grouting amount;
4. during be less than or equal to-30kPa of the relative pressure in grouting system or when the settling amount of soft foundation every day surpasses 10mm, by grouting system, in soft foundation, pour into slurries, in filling process, when the slurries amount of pouring into is less than the water yield of discharging from soft foundation, increase the relative pressure of grouting;
5. when the water yield of discharging reaches estimate, improve the relative pressure in low-pressure drainage system from soft foundation, and increase the relative pressure of grouting, slurries infiltration capacity is strengthened.
2. a kind of method that improves bearing capacity of foundation soil according to claim 1, is characterized in that in the building process of described low-pressure drainage system, the spacing between the vertical drainage plate described in adjacent two is 0.9m～2.0m.
3. a kind of method that improves bearing capacity of foundation soil according to claim 2, the thickness that it is characterized in that the described covering bed course in described step 1.-3 be more than or equal to described horizontal drain pipe or described plasm pouring in plane pipe 2 times of external diameter or more than; The sand covering bed course that described covering bed course forms as material for adopting sand.
4. a kind of method that improves bearing capacity of foundation soil according to claim 3, it is characterized in that in described step 1.-4 covering on bed course before cover film, surperficial processing region surrounding at pending soft foundation is offered the trench that the degree of depth is greater than 1m, for the border of the edge seal as film.
5. according to a kind of method that improves bearing capacity of foundation soil described in any one in claim 1 to 4, it is characterized in that during described step 2., the selection course of grouting agent is: if the bearing capacity that the foundation requirement after consolidation process reaches is for being more than or equal to 60kN/m
2and be less than or equal to 70kN/m
2, select high strength clay class grouting agent; If the bearing capacity that the foundation requirement after consolidation process reaches is for being greater than 70kN/m
2, select cement-based grouting material.
6. a kind of method that improves bearing capacity of foundation soil according to claim 5, is characterized in that described cement-based grouting material is cement-fly ash or cement-slag mixture.
7. a kind of method that improves bearing capacity of foundation soil according to claim 5, controls grout pump while it is characterized in that starting to pour into slurries in soft foundation during described step 4. and makes the relative pressure of grouting be greater than 0Pa and be less than or equal to 0.5MPa; In filling process, when the slurries amount of pouring into is less than the water yield of discharging from soft foundation, controlled grouting pump increases the relative pressure of grouting, and guarantees that the relative pressure of the grouting after increase is no more than 1.0MPa.
8. a kind of method that improves bearing capacity of foundation soil according to claim 7, it is characterized in that the estimate during described step 5. depends on the water content in untreated front soft foundation, water content in untreated front soft foundation is 60% when above, estimate be in untreated front soft foundation the water yield 50%～70%, water content in untreated front soft foundation is 60% when following, estimate be in untreated front soft foundation the water yield 40%～50%.
9. a kind of method that improves bearing capacity of foundation soil according to claim 8, while it is characterized in that during described step 5., the vacuum pump when low-pressure drainage system in quits work, controlled grouting pump makes the relative pressure being in the milk increase to maximum value.
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| CN201210589847.9A CN103046534B (en) | 2012-12-28 | 2012-12-28 | Method for improving bearing capacity of foundation |
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| CN104032728B (en) * | 2014-06-16 | 2015-11-04 | 浙江工业大学工程设计集团有限公司 | A kind of vacuum grouting technique |
| CN104775412B (en) * | 2015-03-25 | 2017-04-19 | 广州建恒机电设备安装有限公司 | Stratum reinforcement PSC construction method |
| CN107882013A (en) * | 2017-12-21 | 2018-04-06 | 广东赣鸿建设有限公司 | A kind of sludge solidification device and method of vacuum injection joint resistance heating |
| CN109667261A (en) * | 2019-01-28 | 2019-04-23 | 三峡大学 | Foundation-reinforcing device and method |
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| CN102650128A (en) * | 2012-04-26 | 2012-08-29 | 浙江大学城市学院 | Cement mixing pile with stiffness core capable of draining and pre-pressing firstly and then grouting as well as construction method thereof |
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| CN101591904A (en) * | 2008-05-28 | 2009-12-02 | 徐立新 | The reinforcement means of grouting following drainage prepressing type drainage body composite pile foundation |
| JP2012112103A (en) * | 2010-11-20 | 2012-06-14 | Maruyama Kogyo Kk | Soft ground improvement method |
| CN102226335A (en) * | 2011-04-18 | 2011-10-26 | 中交四航工程研究院有限公司 | Foundation treatment method for controlling post-construction settlement and deformation of soft soil |
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