CN113931165B - Soft soil foundation vacuum preloading construction structure and construction method - Google Patents
Soft soil foundation vacuum preloading construction structure and construction method Download PDFInfo
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- CN113931165B CN113931165B CN202111258433.3A CN202111258433A CN113931165B CN 113931165 B CN113931165 B CN 113931165B CN 202111258433 A CN202111258433 A CN 202111258433A CN 113931165 B CN113931165 B CN 113931165B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0053—Production methods using suction or vacuum techniques
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Abstract
The utility model relates to a soft soil foundation vacuum preloading construction structures and construction method, wherein the main scheme is a soft soil foundation vacuum preloading construction structures, and it includes drain bar, branch drain pipe and drainage person in charge, branch drain pipe is connected with the upper end of a plurality of drain bars simultaneously, the drainage person in charge is connected with a plurality of branch drain pipes simultaneously, the one end that the drainage was responsible for is used for connecting evacuation equipment, the two narrow side departments of drain bar all are equipped with first strip gasbag, first strip gasbag with the equal length setting of drain bar, the air inlet of first strip gasbag is located the upper end. This application utilizes the inflated form through setting up first strip gasbag, strengthens the structural strength of first strip gasbag to improve the bending resistance ability of flexible drain bar, thereby ensure overall structure's vacuum downward transmission efficiency and vertical drainage efficiency.
Description
Technical Field
The application relates to the field of soft soil foundation treatment technology, in particular to a vacuum preloading construction structure and a vacuum preloading construction method for a soft soil foundation.
Background
The soft soil is regional special soil with low strength, high compressibility and high sensitivity, and is widely distributed in 38 cities of 11 provinces (regions and cities) along the coast with the most concentrated population and most developed economy in China.
At present, the mature technical method for treating the soft soil foundation is a vacuum preloading method. The vacuum preloading method is that a sand cushion layer is firstly paved on the surface of a soft soil foundation to be reinforced, then a vertical drainage channel (a drainage pipe or a drainage plate) is embedded, then the drainage channel is connected with a main pipe at the position of the sand cushion layer, the main pipe is isolated from the atmosphere by using an airtight sealing film, the main pipe penetrates from the sealing film and is connected with a vacuum pump and a drainage pump, and then the vacuum pump is used for carrying out vacuum pumping treatment on the soft soil foundation, so that the soil body below the sealing film is subjected to negative pressure. Under the action of negative pressure, pore water gradually seeps into the vertical drainage channel, and the drainage pump discharges the water to achieve the aims of soil body drainage consolidation and strength increase.
To the correlation technique among the above-mentioned, the inventor thinks, the drain bar can vertically implant in the soft soil foundation through the picture peg machine, for drain pipe or drainage well, the drain bar has the convenient efficient advantage of construction, but because the drain bar is soft area structure, consequently when carrying out vacuum pre-compaction processing, the soft soil body often can produce inhomogeneous radial shrinkage, will produce inhomogeneous lateral stress in drain bar department like this, vertical drain bar then easily produces the phenomenon of anomalous side direction bending or even buckling deformation under the effect of inhomogeneous lateral stress, and then influence the downward transmission efficiency and the vertical drainage efficiency of vacuum.
Disclosure of Invention
In order to reduce the lateral deformation of the drainage plate, the application provides a soft soil foundation vacuum preloading construction structure and a construction method.
The application provides a pair of soft soil foundation vacuum preloading construction structures adopts following technical scheme:
the utility model provides a soft soil foundation vacuum preloading construction structures, includes drain bar, drainage branch pipe and drainage person in charge, drainage branch pipe is connected with the upper end of a plurality of drain bars simultaneously, drainage person in charge is connected with a plurality of drainage branch pipes simultaneously, the one end that the drainage was responsible for is used for connecting evacuation equipment, the two narrow side departments of drain bar all are equipped with first strip gasbag, first strip gasbag with the isometric setting of drain bar, the air inlet of first strip gasbag is located the upper end.
By adopting the technical scheme, the flexibility of the first uninflated strip-shaped air bag is approximately the same as that of the drainage plate, so that the first strip-shaped air bag can be coiled together with the drainage plate, and the drainage plate can be conveniently inserted into the ground by the plate inserting machine in an unreeling mode.
Secondly, the structural strength of the first strip-shaped air bag is strengthened by utilizing an inflation mode, so that the bending resistance of the flexible drainage plate is improved, and the downward transmission efficiency and the longitudinal drainage efficiency of the vacuum degree of the whole structure are ensured.
And thirdly, the first strip-shaped air bag gradually extends in the inflating process to drive the drainage plate to extend, so that the straightness of the drainage plate is greatly improved.
Optionally, the first strip-shaped airbag comprises two connected half-airbags; on the cross section of the first strip-shaped air bag, the part, far away from the other half bag, of the half bag extends outwards along the thickness direction of the drain plate, and the tail end, far away from the other half bag, of the half bag extends towards the center of the drain plate along the width direction of the drain plate.
Through adopting above-mentioned technical scheme, through the shape of injecing half bag, the degree of difficulty increase of its deformation to effectively improve the bending resistance ability of first strip gasbag and drain bar.
Optionally, the geometric center line of the first strip-shaped air bag is parallel to the geometric center line of the drainage plate, and the cross-sectional area of the first strip-shaped air bag is gradually reduced from top to bottom.
By adopting the technical scheme, when the soil body is subjected to uneven radial shrinkage due to vacuumizing, the drainage plate is subjected to uneven lateral force, and the lateral force is decomposed by the inclined surface of the first strip-shaped air bag, so that the lateral force applied to the drainage plate is reduced to a certain extent, and the straightness of the drainage plate is improved in a phase-changing manner.
And the upward component of the lateral force can lift the drainage plate to a certain extent, the whole soil body is in an uneven settlement state, the two actions are offset, the altitude of the drainage plate can be ensured to be as constant as possible, and the situation that the drainage plate is separated from the drainage branch pipe due to the fact that the drainage plate moves down excessively is reduced.
Optionally, the surface of the first strip-shaped airbag is convexly configured with a plurality of densely arranged point-shaped airbags.
By adopting the technical scheme, in the inflating process of the first strip-shaped air bag, the point-shaped air bag enables multi-point hole walls to be formed in the hole walls of the soil body, so that the tension of water is broken, and further, the pore water can flow into the drainage plate easily due to negative pressure, and the sludge effect formed by the pore water accumulated on the surface of the drainage plate is reduced.
Optionally, a second strip-shaped air bag is arranged on the wide side surface of the drainage plate, the second strip-shaped air bag and the drainage plate are arranged in equal length, and an air inlet of the second strip-shaped air bag is located at the upper end; the edge of the second strip-shaped air bag is convexly provided with a second sawtooth bag, the edge of the first strip-shaped air bag is convexly provided with a first sawtooth bag, and the first sawtooth bag and the second sawtooth bag are mutually meshed.
Through adopting above-mentioned technical scheme, through the interlock of second sawtooth bag with first sawtooth bag for first strip gasbag and second strip gasbag carry out the atress and connect, resist with the combination to the lateral force of the soil body, thereby greatly improve drain bar's anti deformability.
Optionally, still including the inserted bar that is arranged in vertical insertion soft soil foundation, the upper end of inserted bar is equipped with first connecting rod and second connecting rod, wherein the lower extreme of first connecting rod with the inserted bar upper end is articulated to be connected, the upper end of second connecting rod with drainage branch pipe can dismantle articulated to be connected, the upper end of first connecting rod with the lower extreme of second connecting rod passes through ratchet structure and articulates the connection, ratchet structure only allows the lower extreme of first connecting rod is along keeping away from the direction deflection of second connecting rod.
Through adopting above-mentioned technical scheme, when the soft soil foundation takes place inhomogeneous settlement, the inserted bar subsides along with the soft soil foundation this moment, the inserted bar that moves down drives the lower extreme of first connecting rod and deflects certain angle downwards, and when subsiding the end, the ratchet structure lock is died, the relative position of inserted bar, first connecting rod and second connecting rod remains unchanged, consequently this combination can also play the supporting role to the drainage branch pipe, thereby it causes the drainage branch pipe to move down to reduce because of the foundation subsides, thereby it takes place the condition that breaks away from to reduce drainage branch pipe and drainage person in charge.
Optionally, a connecting band is connected between the opposite positions of the two half bags, a containing area is formed between the connecting band and the surfaces of the half bags in a surrounding manner, and the inserted link is located in the containing area.
By adopting the technical scheme, the insertion rod is flexibly connected with the first strip-shaped air bag through the matching of the connecting belt and the insertion rod, so that the insertion rod and the first strip-shaped air bag can jointly resist the lateral force of the soil body, and the deformation resistance of the drainage plate is improved.
Optionally, the lower end of the inserted bar is provided with a fin which is obliquely arranged upwards, and the fin is hinged to the lower end of the inserted bar.
By adopting the technical scheme, the inserted bar is easier to settle along with the soil body.
The application also provides a soft soil foundation vacuum preloading construction method, which adopts the following technical scheme:
a soft soil foundation vacuum preloading construction method comprises the following steps:
s1, paving a sand cushion layer;
s2, inserting a drainage plate;
s3, inflating the airbag: inflating the first strip-shaped air bag and the second strip-shaped air bag;
s4, mounting a branch drain pipe to connect the branch drain pipe with the upper end of the drain board;
s5, installing a main drainage pipe;
s6, laying a sealing film on the surface of the sand cushion layer, and installing a vacuumizing device at one end of the main drainage pipe;
s7, sealing the periphery of the sealing film;
and S8, vacuumizing.
Alternatively, in step S2, the first strip-shaped airbag and the second strip-shaped airbag on both sides are inflated simultaneously.
By adopting the technical scheme, the expansion speed of the second sawtooth sac is approximately the same as that of the first sawtooth sac in the inflation process, so that the second sawtooth sac and the first sawtooth sac are meshed with each other conveniently.
In summary, the present application includes at least one of the following beneficial technical effects:
the first strip-shaped air bag is arranged, and the structural strength of the first strip-shaped air bag is enhanced by utilizing an inflation mode, so that the bending resistance of the flexible drainage plate is improved, and the downward transmission efficiency and the longitudinal drainage efficiency of the vacuum degree of the whole structure are ensured;
through the occlusion of the second sawtooth bag and the first sawtooth bag, the first strip-shaped air bag and the second strip-shaped air bag are in stressed connection so as to combine to resist the lateral force of the soil body, thereby greatly improving the deformation resistance of the drainage plate;
through setting up inserted bar, first connecting rod and second connecting rod, when the soft soil foundation takes place inhomogeneous settlement, this combination can also play the supporting role to the drainage branch pipe to the reduction leads to the drainage branch pipe to move down because of the foundation subsides, thereby reduces the condition that drainage branch pipe and drainage main pipe take place to break away from.
Drawings
Fig. 1 is a schematic view of a soft soil foundation vacuum preloading construction structure of embodiment 1.
Fig. 2 is a schematic structural view of the drain board of embodiment 1.
Fig. 3 is a plan view of the drain board of embodiment 1.
Fig. 4 is a partially enlarged view of a portion a in fig. 2.
Fig. 5 is a flow chart of the construction method of embodiment 1.
Fig. 6 is a plan view of the drain board of embodiment 2.
Fig. 7 is a schematic structural view of a drain board according to embodiment 3.
Fig. 8 is a partial enlarged view at B in fig. 7.
Description of reference numerals: 1. a drain plate; 2. a drain branch pipe; 3. a main drainage pipe; 4. vacuumizing equipment; 5. a first strip-shaped airbag; 6. a second strip-shaped air bag; 7. inserting a rod; 8. a first link; 9. a second link; 10. a ratchet structure; 101. a ratchet wheel; 102. a pawl; 51. a half capsule; 52. a first serration capsule; 53. a punctate sac; 54. a connecting belt; 61. a second serration capsule; 71. a fin; 91. and (7) a pin shaft.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The embodiment 1 of the application discloses soft soil foundation vacuum preloading construction structures.
Referring to fig. 1, the vacuum preloading construction structure for the soft soil foundation comprises a plurality of drainage plates 1, a plurality of drainage branch pipes 2, a plurality of drainage main pipes 3 and a plurality of vacuumizing devices 4, wherein the drainage plates 1 are vertically inserted into the soft soil foundation through a plate inserting machine, and the upper ends of the drainage plates 1 are exposed; the number of the branch drain pipes 2 is plural, the branch drain pipes 2 are connected to the upper ends of the plurality of drain plates 1 at the same time, the main drain pipe 3 is connected to the plurality of branch drain pipes 2 at the same time, and one end of the main drain pipe 3 is connected to the vacuum-pumping device 4.
As shown in fig. 2, two narrow sides of the drain plate 1 are all provided with a first strip-shaped airbag 5, the first strip-shaped airbag 5 is arranged with the drain plate 1 in equal length, the air inlet of the first strip-shaped airbag 5 is positioned at the upper end, the geometric center line of the first strip-shaped airbag 5 is parallel to the geometric center line of the drain plate 1, the cross-sectional area of the first strip-shaped airbag 5 is gradually reduced from top to bottom, namely, the first strip-shaped airbag 5 is in an inverted cone shape, and the first strip-shaped airbag 5 has an inclined surface.
As shown in fig. 3, the first strip airbag 5 includes two connected half-bags 51; on the cross section of the first strip-shaped airbag 5, the part of the half bag 51 far away from the other half bag 51 extends outwards along the thickness direction of the drainage plate 1, and the tail end of the half bag 51 far away from the other half bag 51 extends towards the center of the drainage plate 1 along the width direction of the drainage plate 1, namely, the cross section of the half bag 51 is crescent-shaped, and the cross sections of the two half bags 51 are combined into a 3 shape.
As shown in fig. 4, the first strip-shaped airbag 5 is convexly configured with first zigzag bags 52 at sharp corner edges, and the first zigzag bags 52 are arranged at equal intervals along the length direction of the first strip-shaped airbag 5.
As shown in fig. 3 and 4, the wide side surface of the drain board 1 is provided with second strip-shaped air bags 6 at a position close to the narrow side surface, two second strip-shaped air bags 6 correspond to one first strip-shaped air bag 5, the second strip-shaped air bags 6 are arranged at equal length with the drain board 1, and air inlets of the second strip-shaped air bags 6 are positioned at the upper end; the edge of the second strip-shaped air bag 6 is convexly provided with second sawtooth bags 61, the second sawtooth bags 61 are arranged at equal intervals along the length direction of the second strip-shaped air bag 6, the first sawtooth bags 52 and the second sawtooth bags 61 are both formed by inflation, and the first sawtooth bags 52 are mutually meshed with the second sawtooth bags 61.
The embodiment 1 of the present application further discloses a construction method for applying a soft soil foundation vacuum preloading construction structure, as shown in fig. 5, including the following steps:
s1, paving a sand cushion layer: the method comprises the steps of cleaning broken stones and accumulated soil on the surface of a soft soil foundation, and then paving a sand cushion layer, specifically, unloading sand conveyed by an automobile into a plurality of sand piles, and then flattening the sand piles by using a bulldozer.
S2, inserting the drainage plate 1: and then the drainage plates 1 are inserted into the soft soil foundation in sequence at intervals through a plate inserting machine, and the upper ends of the drainage plates 1, the first strip-shaped air bags 5 and the second strip-shaped air bags 6 are all exposed.
S3, inflating the airbag: the first strip-shaped air bag 5 and the second strip-shaped air bag 6 on the two sides are simultaneously inflated by the air pump, the first strip-shaped air bag 5 and the second strip-shaped air bag 6 are gradually expanded and formed, and the second sawtooth bag 61 and the first sawtooth bag 52 are gradually meshed together.
S4, mounting the drainage branch pipe 2: a plurality of the branch drain pipes 2 are placed in parallel in advance, and then the branch drain pipes 2 are connected with a plurality of drain boards 1 in the same row in sequence.
And S5, connecting the main drain pipe 3 with the plurality of branch drain pipes 2.
S6, laying a sealing film: the sealing film and the sealing film are bonded by a hot bonding method, the lap joint length of the heat seal processing is not less than 15mm, the sealing film is relaxed during laying, and the surface integrity is ensured; one end of the main drain pipe 3 penetrates through the sealing film and is connected with an external vacuum-pumping device 4.
S7, sealing treatment: digging a ditch on the periphery of the sealing membrane, pressing the periphery of the sealing membrane into the ditch, and filling soil.
And S8, starting a vacuum device and vacuumizing.
The implementation principle of the embodiment 1 of the application is as follows: the first strip-shaped air bag 5 and the second strip-shaped air bag 6 are formed in an inflated mode in an expanded mode, and the bending resistance of the first strip-shaped air bag is greatly improved, so that the bending resistance of the flexible drainage plate 1 is improved, and the downward transmission efficiency and the longitudinal drainage efficiency of the vacuum degree of the whole structure are further ensured; and the difficulty of deformation of the half bladder 51 is increased by defining the shape of the half bladder 51, thereby effectively improving the bending resistance of the first strip-shaped air bag 5 and the drain board 1.
Secondly, when the drain board 1 will receive uneven lateral force, and this lateral force will be decomposed by the inclined surface of first strip gasbag 5, consequently reduced the lateral force that the drain board 1 received to a certain extent to the straightness accuracy that improves the drain board 1 is changeed mutually, and then guarantees overall structure's vacuum downward transmission efficiency and vertical drainage efficiency.
Thirdly, the first strip-shaped air bag 5 and the second strip-shaped air bag 6 are combined to resist the lateral force of the soil body through the occlusion of the second sawtooth bag 61 and the first sawtooth bag 52, so that the deformation resistance of the drainage plate 1 is greatly improved.
In embodiment 2, in addition to embodiment 1, as shown in fig. 6, a plurality of dot-shaped cells 53 are protruded from the surface of the first strip-shaped airbag 5, and the dot-shaped cells 53 are densely arranged.
In the inflation process of the first strip-shaped air bag 5, the punctiform bags 53 form multipoint hole walls in the hole walls of the soil body, so that the tension of pore water is broken, the pore water flows into the drainage plate 1 easily due to negative pressure, and the sludge effect formed by the pore water accumulated on the surface of the drainage plate 1 is reduced.
Embodiment 3, on the basis of embodiment 1, as shown in fig. 7, the vacuum preloading construction structure for soft soil foundation further includes an insertion rod 7, a first connecting rod 8 and a second connecting rod 9, wherein the insertion rod 7 is vertically inserted into the soft soil foundation, the lower end of the insertion rod 7 is hinged with two symmetrically arranged fins 71, the fins 71 are tightly attached to the outer circumferential surface of the insertion rod 7 when being folded, and the fins 71 are in an upward inclined state when being unfolded; a connecting belt 54 is connected between the two half bags 51 at the opposite positions, a containing area is formed between the connecting belt 54 and the surfaces of the half bags 51 in a surrounding manner, and the inserted rod 7 is positioned in the containing area.
The lower extreme of first connecting rod 8 is connected with the upper end of inserted bar 7 is articulated, and the articulated connection can be dismantled with the lower surface of branch drain pipe 2 to the upper end of second connecting rod 9, specifically is, and second connecting rod 9 is connected with branch drain pipe 2 through round pin axle 91 is articulated, gets round pin axle 91 through inserting promptly and connects or dismantle in order to realize.
The upper end of the first link 8 is hinged to the lower end of the second link 9 through a ratchet structure 10, as shown in fig. 8, specifically, the upper end of the first link 8 is hinged to the lower end of the second link 9, and a pawl 102 of the ratchet structure 10 is fixedly connected to the upper end of the first link 8, a ratchet 101 of the ratchet structure 10 is mounted at the lower end of the second link 9, and the ratchet 101 and the pawl 102 cooperate to realize unidirectional deflection of the first link 8, that is, the ratchet structure 10 only allows the lower end of the first link 8 to deflect in a direction away from the second link 9.
The implementation principle of the embodiment 3 is as follows: when the soft soil foundation is unevenly settled, the inserted link 7 is settled along with the soft soil foundation, the inserted link 7 moving downwards drives the lower end of the first connecting rod 8 to deflect downwards by a certain angle, and when the settlement is finished, the ratchet structure 10 is locked, and the relative positions of the inserted link 7, the first connecting rod 8 and the second connecting rod 9 are kept unchanged, so that the combination can support the drainage branch pipe 2, the downward movement of the drainage branch pipe 2 caused by the settlement of the foundation is reduced, and the separation of the drainage branch pipe 2 and the drainage main pipe 3 is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a soft soil foundation vacuum preloading construction structures, includes drain bar (1), drainage branch pipe (2) and drainage person in charge (3), drainage branch pipe (2) are connected with the upper end of a plurality of drain bar (1) simultaneously, drainage person in charge (3) are connected with a plurality of drainage branch pipe (2) simultaneously, the one end that drainage person in charge (3) is used for connecting evacuation equipment (4), its characterized in that: the drainage plate is characterized in that first strip-shaped air bags (5) are arranged at two narrow side edges of the drainage plate (1), the first strip-shaped air bags (5) are arranged at the same length as the drainage plate (1), and air inlets of the first strip-shaped air bags (5) are positioned at the upper end; the first strip-shaped air bag (5) comprises two connected half bags (51); on the cross section of the first strip-shaped air bag (5), the part, away from the other half bag (51), of the half bag (51) extends outwards along the thickness direction of the drainage plate (1), and the tail end, away from the other half bag (51), of the half bag (51) extends towards the center of the drainage plate (1) along the width direction of the drainage plate (1).
2. A soft soil foundation vacuum preloading construction structure as claimed in claim 1, characterized in that: the geometric center line of the first strip-shaped air bag (5) is parallel to the geometric center line of the drainage plate (1), and the cross-sectional area of the first strip-shaped air bag (5) is gradually reduced from top to bottom.
3. A soft soil foundation vacuum preloading construction structure as claimed in claim 2, characterized in that: the surface of the first strip-shaped air bag (5) is convexly provided with a plurality of densely distributed point-shaped air bags (53).
4. A soft soil foundation vacuum preloading construction structure as claimed in any one of claims 1-3, characterized in that: a second strip-shaped air bag (6) is arranged on the wide side face of the drainage plate (1), the second strip-shaped air bag (6) and the drainage plate (1) are arranged in equal length, and an air inlet of the second strip-shaped air bag (6) is positioned at the upper end; the edge of the second strip-shaped air bag (6) is convexly provided with a second sawtooth bag (61), the edge of the first strip-shaped air bag (5) is convexly provided with a first sawtooth bag (52), and the first sawtooth bag (52) is mutually meshed with the second sawtooth bag (61).
5. A soft soil foundation vacuum preloading construction structure as claimed in claim 1, characterized in that: still including inserted bar (7) that are arranged in vertical insertion soft soil foundation, the upper end of inserted bar (7) is equipped with first connecting rod (8) and second connecting rod (9), wherein the lower extreme of first connecting rod (8) with inserted bar (7) upper end is articulated to be connected, the upper end of second connecting rod (9) with drainage branch pipe (2) can be dismantled articulated to be connected, the upper end of first connecting rod (8) with the lower extreme of second connecting rod (9) passes through ratchet structure (10) and articulates the connection, ratchet structure (10) only allow the lower extreme of first connecting rod (8) is along keeping away from the direction deflection of second connecting rod (9).
6. A soft soil foundation vacuum preloading construction structure of claim 5, characterized in that: two be connected with connecting band (54) between half bag (51) the back of the body position mutually, connecting band (54) with it encloses between half bag (51) surface and is formed with the accommodation area, inserted bar (7) are located in the accommodation area.
7. A soft soil foundation vacuum preloading construction structure of claim 6, characterized in that: the lower extreme of inserted bar (7) is equipped with the slope and upwards sets up fin (71), just fin (71) with the articulated connection of lower extreme of inserted bar (7).
8. A soft soil foundation vacuum preloading construction method, the application of the soft soil foundation vacuum preloading construction structure of claim 4, characterized in that: the method comprises the following steps:
s1, paving a sand cushion layer;
s2, inserting a drainage plate (1);
s3, inflating the airbag: inflating the first strip-shaped air bag (5) and the second strip-shaped air bag (6);
s4, installing a branch drainage pipe (2) to connect the branch drainage pipe (2) with the upper end of the drainage plate (1);
s5, installing a main drainage pipe (3);
s6, laying a sealing film on the surface of the sand cushion layer, and installing a vacuumizing device (4) at one end of the main drainage pipe (3);
s7, sealing the periphery of the sealing film;
and S8, vacuumizing.
9. The soft soil foundation vacuum preloading construction method of claim 8, characterized in that: in step S2, the first strip airbag (5) and the second strip airbag (6) on both sides are inflated simultaneously.
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| JP3066731B2 (en) * | 1996-04-10 | 2000-07-17 | 東拓工業株式会社 | Culvert |
| CN206707742U (en) * | 2017-04-01 | 2017-12-05 | 中国铁道科学研究院铁道建筑研究所 | Pressing device |
| CN110130315A (en) * | 2019-05-09 | 2019-08-16 | 同济大学 | In conjunction with air bag hole in pneumatic radial precompressed vacuum drainage panel assembly and drainage system |
| CN210263012U (en) * | 2019-07-22 | 2020-04-07 | 上海宝冶集团南京建筑有限公司 | Ground fixing stable drainage plate |
| CN111236205B (en) * | 2020-01-10 | 2021-09-07 | 深圳市蛇口招商港湾工程有限公司 | Soft soil foundation vacuum preloading construction structure and construction method thereof |
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