CN111236205A - Soft soil foundation vacuum preloading construction structure and construction method thereof - Google Patents
Soft soil foundation vacuum preloading construction structure and construction method thereof Download PDFInfo
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- CN111236205A CN111236205A CN202010027037.9A CN202010027037A CN111236205A CN 111236205 A CN111236205 A CN 111236205A CN 202010027037 A CN202010027037 A CN 202010027037A CN 111236205 A CN111236205 A CN 111236205A
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
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- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a vacuum preloading construction method for a soft soil foundation, which belongs to the technical field of soft soil foundation treatment and comprises a plurality of drainage plates inserted below the soft soil foundation, wherein the top ends of the drainage plates are communicated and provided with a plurality of parallel horizontal branch pipes, each horizontal branch pipe is communicated with a plurality of drainage plates, the top ends of the horizontal branch pipes are communicated and provided with a same drainage main pipe, the drainage main pipe is communicated and provided with a vacuum pumping device, the horizontal branch pipes are provided with a plurality of groups of anti-settling assemblies along the axis direction of the horizontal branch pipes, each anti-settling assembly comprises a support pillar vertically driven below the foundation, the lower surface of the support pillar is abutted against the bottom of the horizontal branch pipe, the top end of the support pillar is slidably sleeved with a sliding sleeve, the sliding sleeve is hollow, two sides of, the invention has the effect of avoiding the settlement of the communicated pipelines along with the foundation.
Description
Technical Field
The invention relates to the technical field of soft soil foundation treatment, in particular to a vacuum preloading construction method for a soft soil foundation.
Background
A large amount of soft soil is distributed along the river and coastal areas in China, and at present, the construction land is increasingly tense, so that the technical problem of how to process the soft soil to meet the requirement of engineering construction is always solved. Oil gas is used for treating dredger fill in coastal areas of southeast, and becomes a key technology for ports, traffic and city construction in the coastal areas.
A method for treating soft soil foundation by vacuum preloading is provided and applied in China from the eighties of the last century, the essence of the soft soil foundation by vacuum preloading is a drainage consolidation process, namely air below a sealing film and in soil is pumped out by vacuum pumping equipment, vacuum degree is transmitted downwards along a vertical drainage plate, thus an air pressure difference is formed between the vertical drainage plate and the soil around the vertical drainage plate, pore water in the soil seeps to the vertical drainage plate under the action of the air pressure difference, and the purpose of drainage consolidation is achieved. When the soft soil foundation is treated by adopting the traditional vacuum preloading method, the vacuum pressure transmission path is as follows: vacuum device-main pipe-filter tube-drain bar-reinforced soil body.
The existing Chinese patent with the reference publication number of CN104818706B discloses a novel vacuum preloading soft soil foundation treatment process, which comprises the following steps: the device comprises a shallow layer vertical drainage plate, a deep layer vertical drainage plate, a transverse drainage branch pipe connected with the shallow layer vertical drainage plate, a transverse drainage branch pipe connected with the deep layer vertical drainage plate, a transverse drainage main pipe, a sealing system and vacuumizing equipment. The novel insertion of the drainage plate is realized, the soil body can be divided into two layers through the novel insertion plate to be respectively treated, namely, the vacuum degree can be directly transmitted to the deep vertical drainage plate through the vertical gas transmission pipe, and the damping effect received by the transmission in the shallow soil body is avoided, so that the deep soil body can be better reinforced.
The above prior art solutions have the following drawbacks: among the processing technology of above-mentioned vacuum preloading soft soil foundation, when utilizing evacuation equipment to carry out the evacuation operation, the soft soil gradually becomes closely knit, along with air and the in-process that pore water in the soft soil was constantly taken out, the ground can take place to subside, the ground subsides in-process and can make horizontal drainage branch pipe and horizontal drainage be responsible for and take place between each pipeline to drop, lead to the leakproofness among the pre-compaction processing procedure relatively poor, the closely knit degree of ground can not be ensured.
Disclosure of Invention
The invention aims to provide a soft soil foundation vacuum preloading construction structure for preventing communicated pipelines from settling along with a foundation.
One of the technical purposes of the invention is realized by the following technical scheme:
the utility model provides a soft soil foundation vacuum preloading construction structures, is including inserting many drain bars below the soft soil foundation, and the top intercommunication of drain bar is provided with many horizontal branch pipes that are parallel to each other, and many drain bars of each horizontal branch pipe intercommunication, and the top intercommunication of many horizontal branch pipes is provided with same drainage house steward, and the drainage house steward intercommunication is provided with evacuation equipment, horizontal branch pipe is provided with the multiunit along self axis direction and prevents subsiding the subassembly, prevents subsiding the subassembly and includes the vertical support column of squeezing into below the foundation, the lower surface of support column and the bottom butt of horizontal branch pipe, and the top slip cover of support column is equipped with the sliding sleeve, and the inside cavity of sliding sleeve and sliding sleeve articulate along the both sides of horizontal branch pipe axis direction and are provided.
Through the technical scheme, in the work progress, evacuation equipment passes through the drain main, horizontal branch pipe and drain bar take out the moisture below the soft soil foundation, at the in-process of taking groundwater out, the soft soil foundation can take place to subside, the support column can support the horizontal branch pipe this moment, and then support the drain main, when the support column takes place to subside along with the soft soil foundation together, the sliding sleeve can be upwards lifted, thereby continue to support the horizontal branch pipe, thereby alleviate the support failure because the support column subsides the emergence, improve the supporting effect to the horizontal branch pipe, and then each pipeline of avoiding the intercommunication takes place to subside along with the foundation together.
The present invention in a preferred example may be further configured to: the sliding sleeve is hollow inside, pawls which are inclined downwards and arranged in a splayed shape are fixedly arranged on two sides of the supporting column, which are positioned in the sliding sleeve, of the corresponding supporting rod, the middle of the supporting rod is hinged to the sliding sleeve, one end of the supporting rod penetrates into the sliding sleeve in an inclined mode, ratchets are arranged on the upper surface, which is positioned in the sliding sleeve, of the supporting rod, the pawls are matched with the ratchets, and a supporting block used for supporting the horizontal branch pipe is hinged to.
Through above-mentioned technical scheme, when the support column takes place to subside along with the soft soil foundation together, the pawl can subside along with the support column together, the bottom of pawl can extrude the bracing piece, and with the ratchet cooperation on the bracing piece, thereby it is articulated with the sliding sleeve to drive the bracing piece round, the bracing piece pivoted in-process drives the supporting shoe and rises, thereby the bracing piece top breaks away from the support to horizontal branch pipe, the supporting shoe replaces the bracing piece to support horizontal branch pipe, and the pawl cooperatees with the ratchet, make the supporting shoe keep the steady supporting effect, and can not take place to drop, the support stability of supporting shoe to horizontal branch pipe has.
The present invention in a preferred example may be further configured to: the upper portion of the supporting block is fixedly provided with an arc-shaped plate which is attached to the lower surface of the horizontal branch pipe, and a spring is fixedly connected between the supporting block and the arc-shaped plate.
Through above-mentioned technical scheme, the arc can with the lower surface laminating of horizontal branch pipe, improve the supporting effect to horizontal branch pipe to the arc is higher to the support stability of horizontal branch pipe, fixed connection spring between supporting shoe and arc, when making the arc support horizontal branch pipe, can slow down the rigidity impact that horizontal branch pipe received, even consequently the bracing piece takes place to subside, the support stability of horizontal branch pipe also can obtain effectual improvement.
The present invention in a preferred example may be further configured to: and an anti-abrasion pad is fixedly arranged on the upper surface of the arc-shaped plate.
Through above-mentioned technical scheme, the setting up of abrasionproof pad makes horizontal branch pipe when obtaining effective support, can slow down the wearing and tearing damage of horizontal branch pipe to horizontal branch pipe is supported the back and the frictional force increase between the abrasionproof pad, and support stability can improve.
The present invention in a preferred example may be further configured to: and the top end of the supporting column is provided with an arc supporting groove which is attached to the lower surface of the horizontal branch pipe.
Through the technical scheme, the arc-shaped supporting groove used for being attached to and supporting the horizontal branch pipe is formed in the top end of the supporting column, so that the horizontal branch pipe is supported more stably and reliably.
The present invention in a preferred example may be further configured to: a sealing film is laid on the surface of the foundation, sealing ditches are formed in the periphery of the foundation, the end portions of the sealing film are located in the sealing ditches, and sand stones cover the sealing film.
Through above-mentioned technical scheme, lay sealing film on the ground surface for the ground can take out air and moisture in the ground better when carrying out vacuum preloading processing, isolated the circulation of air in the air of the part above the ground and the ground, reduce the influence of the air of the part above the ground to the ground inside, thereby make air and moisture in the ground can take out smoothly.
The present invention in a preferred example may be further configured to: the multiple sets of anti-settling assemblies are arranged side by side along the direction perpendicular to the horizontal branch pipes.
Through above-mentioned technical scheme, the subassembly is prevented subsiding by the multiunit sets up side by side along the direction of perpendicular to horizontal branch pipe for horizontal branch pipe can obtain better support, and then improves horizontal branch pipe and the stability of the main sewer with the horizontal branch pipe intercommunication.
The invention also aims to provide a vacuum preloading construction method for the soft soil foundation, which can prevent the drainage plate and each pipeline communicated with the drainage plate from sinking along with the foundation.
The second technical purpose of the invention is realized by the following technical scheme:
a soft soil foundation vacuum preloading construction structure comprises the following steps:
s1, laying a sealing film on the ground, arranging a sealing ditch around the foundation to be subjected to vacuum preloading, positioning the periphery of the sealing film in the sealing ditch, and backfilling sandstone to compress the sealing film;
s2, inserting a drainage plate so that the drainage plate penetrates through the sealing film and is inserted into the ground;
s3, arranging an anti-settling assembly between two adjacent drainage plates, firstly sleeving the sliding sleeve at the top end of the supporting rod, then inserting the supporting rod into the ground, adjusting the position of the sliding sleeve, and enabling the upper surface of the arc-shaped plate to be abutted against the lower surface of the horizontal branch pipe and the horizontal branch pipe to be communicated with the interior of the drainage plate;
and S4, installing a drainage main pipe, enabling the drainage main pipe to be communicated with the plurality of horizontal branch pipes, and arranging a vacuum pumping device in a section of the drainage main pipe in a communication mode.
Through the technical scheme, at first lay sealing film subaerial, and set up sealed ditch, put into sealed ditch inside all around with sealing film, it is fixed that rethread backfill grit carries out the compaction to sealing film, make sealing film can seal comprehensively to the ground, the drain bar directly passes sealed film and inserts the below ground, make whole technology comparatively simple, and can not produce too much influence to the sealed effect of ground, insert after establishing the drain bar, set up between two adjacent drain bars and prevent subsiding the subassembly, when connecting horizontal branch pipe and drain bar intercommunication, prevent subsiding the subassembly and can play good supporting role to the horizontal branch pipe, and after preventing subsiding the subassembly installation, install the convenience of sewer main this moment again and also can improve greatly. When carrying out vacuum pre-compaction to the ground and handling, if the support column takes place to subside with the ground together, the sliding sleeve can drive the arc lifting to continue to support horizontal branch pipe lower surface, ensure that horizontal branch pipe can not follow the support column and take place to subside together.
In conclusion, the beneficial technical effects of the invention are as follows:
1. by arranging the anti-settling component for supporting the horizontal branch pipe, when the vacuum preloading operation is carried out and the supporting columns settle along with the foundation, the anti-settling device can ensure stable support of the horizontal branch pipe, so that the support stability of the horizontal branch pipe is improved;
2. the pawls which are obliquely downward and arranged in a splayed shape are fixedly arranged on two sides of the supporting column, which are positioned in the sliding sleeve and opposite to the supporting rod, and the ratchets are arranged on the upper surface of the supporting rod, which is positioned in the sliding sleeve, so that when the supporting column is settled, the ratchets can be extruded by the pawls to support the horizontal branch pipe, and meanwhile, the horizontal branch pipe cannot fall off during supporting, and the stability is higher;
3. through setting up the arc for the support stability of horizontal branch pipe is with high.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment in a construction state;
FIG. 2 is a schematic structural view of the arrangement of horizontal legs and anti-settling components after the soft soil foundation is hidden;
FIG. 3 is a partial schematic view of a set of drainage plates and anti-settling assemblies corresponding to one of the horizontal legs;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
figure 5 is a cross-sectional view intended to emphasize the anti-settling assembly.
Reference numerals: 1. a drain plate; 2. a horizontal branch pipe; 3. a main drain pipe; 4. vacuumizing equipment; 5. an anti-settling component; 51. a support pillar; 511. an arc-shaped supporting groove; 512. a pawl; 52. a sliding sleeve; 521. a yielding groove; 53. a support bar; 531. a ratchet; 532. a support block; 533. an arc-shaped plate; 534. a spring; 535. an anti-wear pad; 6. sealing the film; 7. and sealing the groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
The utility model provides a soft soil foundation pre-compaction construction structures, as shown in fig. 1 and fig. 2, including inserting a plurality of drain bars 1 that locate below the soft soil foundation, a plurality of drain bars 1 are provided with the multiunit, and a plurality of drain bars 1 of every group set up along same straight line, and 1 top intercommunication of a plurality of drain bars of every group is provided with same horizontal branch pipe 2, the top intercommunication of horizontal branch pipe 2 is provided with main 3, main 3 all communicates with a plurality of horizontal branch pipes 2, main 3 intercommunication of drainage is provided with evacuation equipment 4, in order to ensure that each connecting tube is stability, be equipped with the anti-settlement subassembly 5 that is used for supporting horizontal branch pipe 2 in the interpolation of soft soil foundation, and anti-settlement subassembly 5 can prevent that horizontal branch pipe 2 and main 3 from taking place to subside together when the soft soil foundation subside.
As shown in fig. 1, a sealing film 6 is laid on the surface of the foundation, the drainage plate 1 is inserted into the lower part of the foundation after passing through the sealing film 6, and the top end of the anti-settling assembly 5 also passes through the sealing film 6, thereby supporting the horizontal branch pipe 2. Seted up sealed ditch 7 on the ground, sealed film 6's edge is located sealed ditch 7, and lays the grit in sealed ditch 7 to carry out the compaction to sealed film 6, make sealed film 6 can play well and seal the processing to the soft soil foundation, evacuation equipment 4 can take out the inside air of soft soil foundation and moisture smoothly when carrying out the evacuation operation.
Referring to fig. 3 and 4, the anti-settling assembly 5 includes a plurality of support columns 51, the plurality of support columns 51 are disposed between two adjacent drainage plates 1 in each group of the plurality of drainage plates 1, an arc-shaped support groove 511 adapted to the bottom of the horizontal branch pipe 2 is formed at the top end of each support column 51 for supporting the horizontal branch pipe 2 more stably, a sliding sleeve 52 is slidably sleeved at the top end of each support column 51, a yielding groove 521 is formed at two opposite sides of the sliding sleeve 52, a support rod 53 is inserted into the yielding groove 521, the middle position of the length of the support rod 53 is hinged to the part of the sliding sleeve 52 located in the yielding groove 521, a support block 532 is hinged to the inclined top end of the support rod 53, a plurality of springs 534 are fixedly disposed at the top end of the support block 532, an arc-shaped plate 533 is fixedly disposed at the top end of each spring 534, an anti-wear pad 535 made of rubber is fixedly disposed on the upper, the wear-proof pad 535 is fixed to the arc-shaped plate 533 in an adhering manner, and when the horizontal branch pipe 2 is supported, the lower part of the horizontal branch pipe 2 abuts against the wear-proof pad 535, and the wear-proof pad 535 can reduce the wear to the horizontal branch pipe 2.
As shown in fig. 5, a part of the upper surface of the support rod 53 extending into the sliding sleeve 52 is provided with a ratchet 531, a part of the support column 51 located in the sliding sleeve 52 is fixedly provided with a pawl 512 which is obliquely arranged downwards and away from the center of the support column 51 right above the ratchet 531, and the ratchet 531 is matched with the pawl 512. When soft soil foundation takes place to subside at the evacuation in-process, if support column 51 takes place to subside, pawl 512 descends along with support column 51, make pawl 512 slide down along ratchet 531, thereby drive bracing piece 53 and rotate, bracing piece 53 pivoted in-process, can drive backup pad and arc 533 and rise, and then make arc 533 can not lose to horizontal branch pipe 2's supporting role, even support column 51 breaks away from horizontal branch pipe 2, arc 533 also can carry out the lifting with horizontal branch pipe 2, ensure the support stability to horizontal branch pipe 2, and when support column 51 no longer subsides, pawl 512 card is on ratchet 531, prevent that support column 53 from taking place to rotate the arc 533 that leads to and descend, further improved the support stability of arc 533 to horizontal branch pipe 2.
The implementation principle of the embodiment is as follows: when carrying out normal vacuum pre-compaction to soft soil foundation, lay sealing film 6 on soft soil foundation surface, and utilize the grit to press sealing film 6's edge in sealed ditch 7, then insert drain bar 1 and support column 51 below the soft soil foundation, communicate horizontal branch pipe 2 in drain bar 1 top, and utilize support column 51 to support horizontal branch pipe 2, communicate same root sewer pipe 3 with many horizontal branch pipes 2 after that, the one end intercommunication evacuation equipment 4 of sewer pipe 3. When carrying out vacuum preloading construction, start evacuation equipment 4, evacuation equipment 4 takes out air and moisture in the soft soil foundation, constantly go on along with evacuation process, drain bar 1 and bracing piece 53 all probably subside thereupon together, when bracing piece 53 subsides, drive pawl 512 whereabouts, thereby block ratchet 531, lift up bracing piece 53, and then lifting supporting shoe 532 and arc 533, in order to ensure unchangeable to the supporting effect of horizontal branch pipe 2, improve horizontal branch pipe 2 and drain main 3's support stability.
Example 2
A soft soil foundation vacuum preloading construction method comprises the following steps:
s1, laying a sealing film 6 on the ground, arranging a sealing ditch 7 around the foundation to be subjected to vacuum preloading, positioning the periphery of the sealing film 6 in the sealing ditch 7, and backfilling sand and stone to compress the sealing film 6;
s2, inserting the drain board 1 so that the drain board 1 passes through the sealing film 6 and is inserted into the ground;
s3, arranging an anti-settling assembly 5 between two adjacent drainage plates 1, firstly sleeving the sliding sleeve 52 at the top end of the supporting rod 53, then inserting the supporting rod 53 below the ground, adjusting the position of the sliding sleeve 52, and enabling the upper surface of the arc-shaped plate 533 to be abutted against the lower surface of the horizontal branch pipe 2 and the horizontal branch pipe 2 to be communicated with the interior of the drainage plate 1;
and S4, installing the drainage main pipe 3, enabling the drainage main pipe 3 to be communicated with the plurality of horizontal branch pipes 2, and arranging a vacuum pumping device 4 in a section of the drainage main pipe 3 in a communication mode.
Lay sealing film 6 subaerial, and set up sealing ditch 7, put into sealing ditch 7 inside all around sealing film 6, it is fixed to seal film 6 to carry out the compaction to the rethread backfill grit, make sealing film 6 can seal comprehensively the ground, drain bar 1 directly passes sealing film 6 and inserts the below ground, make overall process comparatively simple, and can not produce too much influence to the sealed effect of ground, insert after establishing drain bar 1, set up between two adjacent drain bars 1 and prevent subsiding subassembly 5, when following horizontal branch pipe 2 and drain bar 1 intercommunication, prevent subsiding subassembly 5 and can play good supporting role to horizontal branch pipe 2, and after preventing subsiding subassembly 5 installation, the convenience of installing main sewer 3 again this moment also can improve greatly. When carrying out vacuum preloading processing to the ground, if support column 51 takes place to subside with the ground together, sliding sleeve 52 can drive arc 533 lifting to continue to support horizontal branch 2 lower surface, ensure that horizontal branch 2 can not follow support column 51 and take place to subside together.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The utility model provides a soft soil foundation vacuum preloading construction structures, is including inserting many drain bars (1) below the soft soil foundation, and the top intercommunication of drain bar (1) is provided with many horizontal branch pipe (2) that are parallel to each other, and many drain bars (1) of each horizontal branch pipe (2) intercommunication, and the top intercommunication of many horizontal branch pipe (2) is provided with same drainage main (3), and drainage main (3) intercommunication is provided with evacuation equipment (4), its characterized in that: horizontal branch pipe (2) are provided with the multiunit along self axis direction and prevent subsiding subassembly (5), prevent subsiding subassembly (5) including vertical support column (51) of squeezing into below the ground, the lower surface of support column (51) and the bottom butt of horizontal branch pipe (2), the top slip cover of support column (51) is equipped with sliding sleeve (52), the inside cavity of sliding sleeve (52) and sliding sleeve (52) are provided with can be along with support column (51) decline and upwards lift up and support bracing piece (53) of horizontal branch pipe (2) along the both sides of horizontal branch pipe (2) axis direction are articulated.
2. A soft soil foundation vacuum preloading construction structure as claimed in claim 1, characterized in that: the novel horizontal branch pipe support is characterized in that the sliding sleeve (52) is hollow, pawls (512) which are inclined downwards and arranged in a splayed manner are fixedly arranged on two sides of the support column (51) which are positioned in the sliding sleeve (52) and opposite to the support rod (53), the middle of the support rod (53) is hinged to the sliding sleeve (52), one end of the support rod is obliquely inserted into the sliding sleeve (52), ratchets (531) are arranged on the upper surface of the support rod (53) which is positioned in the sliding sleeve (52), the pawls (512) are matched with the ratchets (531), and the inclined top end of the support rod (53) penetrates out of the sliding sleeve (52) and is hinged to.
3. A soft soil foundation vacuum preloading construction structure as claimed in claim 2, characterized in that: the upper portion of supporting shoe (532) is fixed and is provided with arc plate (533) of laminating mutually with horizontal branch pipe (2) lower surface, fixedly connected with spring (534) between supporting shoe (532) and arc plate (533).
4. A soft soil foundation vacuum preloading construction structure as claimed in claim 2, characterized in that: an anti-abrasion pad (535) is fixedly arranged on the upper surface of the arc-shaped plate (533).
5. A soft soil foundation vacuum preloading construction structure as claimed in claim 1, characterized in that: and the top end of the supporting column (51) is provided with an arc-shaped supporting groove (511) which is attached to the lower surface of the horizontal branch pipe (2).
6. A soft soil foundation vacuum preloading construction structure as claimed in claim 1, characterized in that: a sealing film (6) is laid on the surface of the foundation, sealing ditches (7) are formed in the periphery of the foundation, the end part of the sealing film (6) is located in the sealing ditches (7) and sand is covered on the sealing film (6).
7. A soft soil foundation vacuum preloading construction structure as claimed in claim 1, characterized in that: the multiple sets of anti-settling components (5) are arranged side by side along the direction vertical to the horizontal branch pipe (2).
8. A soft soil foundation vacuum preloading construction structure as claimed in any one of claims 1-7, characterized in that: the construction method comprises the following steps:
s1, laying a sealing film (6) on the ground, arranging a sealing ditch (7) around the foundation to be subjected to vacuum preloading, positioning the periphery of the sealing film (6) in the sealing ditch (7), and backfilling gravel to compress the sealing film (6);
s2, inserting the drainage board (1) so that the drainage board (1) penetrates through the sealing film (6) and is inserted into the ground;
s3, arranging an anti-settling assembly (5) between two adjacent drainage plates (1), firstly sleeving a sliding sleeve (52) at the top end of a supporting rod (53), then inserting the supporting rod (53) into the ground, adjusting the position of the sliding sleeve (52), enabling the upper surfaces of arc-shaped plates (533) to be abutted against the lower surfaces of horizontal branch pipes (2) and enabling the horizontal branch pipes (2) to be communicated with the interiors of the drainage plates (1);
s4, installing the drainage main pipe (3) to enable the drainage main pipe (3) to be communicated with the plurality of horizontal branch pipes (2), and arranging a vacuum pumping device (4) at one section of the drainage main pipe (3) in a communicated mode.
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| CN113931165A (en) * | 2021-10-27 | 2022-01-14 | 杭州林润建设有限公司 | Soft soil foundation vacuum preloading construction structure and construction method |
| CN114032875A (en) * | 2021-12-14 | 2022-02-11 | 广东省源天工程有限公司 | Sand layer sludge overload prepressing device and method for soft soil foundation |
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| CN112176983A (en) * | 2020-08-28 | 2021-01-05 | 温州大学 | Combined type heating, electroosmosis and drainage pumping frame system |
| CN113931165A (en) * | 2021-10-27 | 2022-01-14 | 杭州林润建设有限公司 | Soft soil foundation vacuum preloading construction structure and construction method |
| CN114032875A (en) * | 2021-12-14 | 2022-02-11 | 广东省源天工程有限公司 | Sand layer sludge overload prepressing device and method for soft soil foundation |
| CN114032875B (en) * | 2021-12-14 | 2022-06-24 | 广东省源天工程有限公司 | Sand layer sludge overload prepressing device and method for soft soil foundation |
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