CN113585224A - Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation - Google Patents
Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation Download PDFInfo
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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
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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Abstract
The invention discloses a construction method of immersed tube reinforcement gravel pile for reinforcing soft foundation, which comprises the steps of firstly constructing on the ground of the foundation to form a pile hole, and circumferentially and uniformly installing a plurality of grouting pipes in the pile hole, wherein the grouting pipes are 0.2-0.3m higher than the ground to facilitate grouting, then pouring gravel from a gravel inlet at the top of the pile pipe, then putting the manufactured geogrid cylinder from the top of the pile hole, then pouring gravel into the opening of the geogrid cylinder to form the reinforcement gravel pile, and after the gravel pile is formed for 3-5 days, pouring cement slurry into the retained grouting pipes by using a high-pressure grouting pump to fill holes in the gravel pile to form the semi-rigid grouting gravel pile. The gravel pile pipe constructed by the method has a simple structure, the construction method is quick and simple, deformation or collapse of the hole wall can not be caused, and the construction quality can be effectively ensured.
Description
Technical Field
The invention relates to the technical field of gravel pile construction, in particular to a construction method of a immersed tube reinforcement hooped gravel pile for reinforcing a soft foundation.
Background
When the natural foundation can not meet the requirement of the building on the foundation, the foundation needs to be processed to form an artificial foundation so as to ensure the safety and normal use of the building. The vertical reinforcement composite foundation is a common foundation reinforcement treatment technical measure, and the vertical reinforcements used in the engineering at present comprise gravel piles, sand piles, cement-soil piles, lime piles, various low-strength piles, reinforced concrete piles and the like. Wherein, because the gravel pile composite foundation can fully play the role of replacement, the shear strength of the foundation is increased; meanwhile, the gravel pile body has good water permeability, and can play a good role in draining water under the action of an upper load. The gravel pile body can also accelerate the consolidation of the foundation, increase the strength of the foundation and reduce the settlement of the foundation; in addition, the gravel pile body has rich material sources and low cost, and is also an important advantage of the gravel pile. Therefore, in recent years, in the soft soil foundation reinforcement treatment, the gravel pile composite foundation has been widely used and achieved remarkable results. The gravel pile hole forming method is commonly used by a vibration water flushing method and a vibration pipe sinking method, and the vibration water flushing method is more suitable because the hole forming in the soft soil is easy to collapse and is difficult to form.
According to the using effect in the current engineering, the geogrid is utilized within the range of the depth of 2m at the upper part of the gravel pile to achieve a better reinforcement effect, the bulging deformation can be fully controlled, and meanwhile, the utilization rate of the geogrid material is highest. However, in the prior art, the construction of the reinforced gravel pile by adopting any process can ensure that the formed pile hole is not deformed or collapsed to ensure the quality, and has simple and convenient processes, thereby becoming a problem to be solved urgently in engineering.
Therefore, in view of the above current situation, there is an urgent need to develop a method for constructing a gravel pile with immersed tube reinforcement for reinforcing a soft foundation, so as to overcome the disadvantages in the current practical use.
Disclosure of Invention
The invention aims to provide a construction method of a immersed tube reinforcement gravel pile for reinforcing a soft foundation, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of a immersed tube reinforcement gravel pile for reinforcing a soft foundation comprises the following steps:
s1001, building a gravel pile construction platform, dragging and transporting the gravel pile construction platform to a foundation, and arranging a gravel storage bin, a vibroflot and a vibration immersed tube gravel pile machine on the gravel pile construction platform;
s1002, constructing on the ground of a foundation to form a pile hole, and uniformly and circumferentially installing a plurality of grouting pipes in the pile hole, wherein the grouting pipes are 0.2-0.3m higher than the ground so as to facilitate grouting;
s1003, mounting a pile pipe on the vibration immersed tube gravel pile machine, vibrating the immersed tube at a preset position of the foundation, and stopping vibrating after reaching a preset elevation; filling broken stones from a broken stone inlet at the top of the pile pipe, continuously supplementing broken stones in the vibrating pipe-pulling process and controlling the amount of broken stones so that the top surfaces of the broken stones are 3-6m away from the top of the pile hole;
s1004, placing the manufactured geogrid cylinder from the top of a pile hole, then filling gravels into the opening of the geogrid cylinder to form a reinforcement gravel pile, wherein the amount of the filled gravels ensures that the top mark energy of the reinforcement gravel pile reaches a preset elevation;
s1005, after the gravel pile is formed for 3-5 days, injecting cement slurry into the hole of the gravel pile from the retained grouting pipe by using a high-pressure grouting pump to form a semi-rigid grouting gravel pile.
As a further scheme of the invention: in step S1001, constructing a gravel pile construction platform includes the following steps:
s2001, arranging a through self-elevating platform in the middle of a gravel pile construction platform, oppositely arranging a pair of gantry structures on the self-elevating platform, enabling two ends of a main beam of each gantry structure to extend out of the self-elevating platform, horizontally arranging a track on the main beam, and arranging a truss crane on the track to enable the truss crane to move along the length direction of the track;
and S2002, connecting the vibroflot to the truss crane, and enabling the truss crane to drive the vibroflot to move left and right and lift up and down on the gravel pile construction platform.
As a further scheme of the invention: in step S1002, the grouting pipes are steel pipes or PVC pipes, and 4-6 grouting pipes are arranged.
As a further scheme of the invention: in step S1003, the method for filling crushed stone includes the following steps:
s3001, determining the pore ratio of dense and piled crushed stones and the expansion degree and viscosity of cement paste for forming cemented crushed stones;
s3002, vibrating by using a vibrator when the pile hole is backfilled with the crushed stone until the porosity ratio of the crushed stone reaches a preset value.
As a further scheme of the invention: in step S1004, the sleeve outer diameter of the geogrid cylinder is 10-20mm smaller than the pile hole inner diameter, and the height is 3 m.
As a further scheme of the invention: in step S1005, the cement paste is prepared by cement of more than 32.5 grades, the water cement ratio is 0.3-0.5, the grouting amount is preferably that the specific gravity of the surface grout is not less than 1.2, and the grouting pressure is 0.1-0.5 Mpa.
As a further scheme of the invention: in step S1005, the cement slurry is one of self-compacting cement slurry, self-compacting clean cement slurry, and underwater self-protecting clean self-compacting clean cement slurry.
Compared with the prior art, the invention has the beneficial effects that: the invention firstly forms a pile hole on the ground of a foundation, and a plurality of grouting pipes are uniformly and circumferentially arranged in the pile hole, the grouting pipes are 0.2-0.3m higher than the ground, so that grouting is convenient, then gravel is poured from a gravel inlet at the top of the pile pipe, the manufactured geogrid cylinder is put from the top of the pile hole, then the gravel is poured into a geogrid cylinder opening to form a rib hooped gravel pile, and after the gravel pile is formed for 3-5 days, cement slurry is poured into the gravel pile from the retained grouting pipe by using a high-pressure grouting pump to fill pores in the gravel pile, so that a semi-rigid grouting gravel pile is formed.
Drawings
Fig. 1 is a flow chart of a construction method of a immersed tube reinforcement gravel pile for reinforcing a soft foundation.
Fig. 2 is a flow chart of a gravel pile construction platform built in the method for constructing the immersed tube reinforcement gravel pile for reinforcing the soft foundation.
FIG. 3 is a flow chart of a gravel filling method in the construction method of the immersed tube reinforcement gravel pile for reinforcing the soft foundation.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are used in a generic sense to refer to, for example, as being fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
Referring to fig. 1-3, in an embodiment of the present invention, a method for constructing a gravel pile with immersed tube reinforcement for reinforcing a soft foundation includes the following steps:
s1001, building a gravel pile construction platform, dragging and transporting the gravel pile construction platform to a foundation, and arranging a gravel storage bin, a vibroflot and a vibration immersed tube gravel pile machine on the gravel pile construction platform;
s1002, constructing on the ground of a foundation to form a pile hole, and uniformly and circumferentially installing a plurality of grouting pipes in the pile hole, wherein the grouting pipes are 0.2-0.3m higher than the ground so as to facilitate grouting;
s1003, mounting a pile pipe on the vibration immersed tube gravel pile machine, vibrating the immersed tube at a preset position of the foundation, and stopping vibrating after reaching a preset elevation; filling broken stones from a broken stone inlet at the top of the pile pipe, continuously supplementing broken stones in the vibrating pipe-pulling process and controlling the amount of broken stones so that the top surfaces of the broken stones are 3m away from the top of the pile hole;
s1004, placing the manufactured geogrid cylinder from the top of a pile hole, then filling gravels into the opening of the geogrid cylinder to form a reinforcement gravel pile, wherein the amount of the filled gravels ensures that the top mark energy of the reinforcement gravel pile reaches a preset elevation;
and S1005, after the gravel pile is formed for 3 days, injecting cement slurry into the hole in the gravel pile from the retained grouting pipe by using a high-pressure grouting pump to form a semi-rigid grouting gravel pile.
In step S1001 in the embodiment of the present invention, constructing a gravel pile construction platform includes the following steps:
s2001, arranging a through self-elevating platform in the middle of a gravel pile construction platform, oppositely arranging a pair of gantry structures on the self-elevating platform, enabling two ends of a main beam of each gantry structure to extend out of the self-elevating platform, horizontally arranging a track on the main beam, and arranging a truss crane on the track to enable the truss crane to move along the length direction of the track;
and S2002, connecting the vibroflot to the truss crane, and enabling the truss crane to drive the vibroflot to move left and right and lift up and down on the gravel pile construction platform.
In step S1002 in the present invention, the grouting pipes are steel pipes or PVC pipes, and 4 grouting pipes are provided.
In step S1003 of the embodiment of the present invention, the method for filling crushed stone includes the following steps:
s3001, determining the pore ratio of dense and piled crushed stones and the expansion degree and viscosity of cement paste for forming cemented crushed stones;
s3002, vibrating by using a vibrator when the pile hole is backfilled with the crushed stone until the porosity ratio of the crushed stone reaches a preset value.
In step S1004, the sleeve outer diameter of the geogrid cylinder is 10mm smaller than the pile hole inner diameter, and the height is 3 m.
In step S1005 of the embodiment of the present invention, the cement slurry is prepared from cement of 32.5 grades or more, the water cement ratio is 0.3, the grouting amount is preferably not less than 1.2 of the specific gravity of the surface slurry, and the grouting pressure is 0.1 Mpa.
In step S1005 of the present embodiment, the cement slurry is self-compacting cement slurry.
Example 2
Referring to fig. 1-3, in an embodiment of the present invention, a method for constructing a gravel pile with immersed tube reinforcement for reinforcing a soft foundation includes the following steps:
s1001, building a gravel pile construction platform, dragging and transporting the gravel pile construction platform to a foundation, and arranging a gravel storage bin, a vibroflot and a vibration immersed tube gravel pile machine on the gravel pile construction platform;
s1002, constructing on the ground of a foundation to form a pile hole, and uniformly and circumferentially installing a plurality of grouting pipes in the pile hole, wherein the grouting pipes are 0.2-0.3m higher than the ground so as to facilitate grouting;
s1003, mounting a pile pipe on the vibration immersed tube gravel pile machine, vibrating the immersed tube at a preset position of the foundation, and stopping vibrating after reaching a preset elevation; filling broken stones from a broken stone inlet at the top of the pile pipe, continuously supplementing broken stones in the vibrating pipe-pulling process and controlling the amount of broken stones so that the top surfaces of the broken stones are 6m away from the top of the pile hole;
s1004, placing the manufactured geogrid cylinder from the top of a pile hole, then filling gravels into the opening of the geogrid cylinder to form a reinforcement gravel pile, wherein the amount of the filled gravels ensures that the top mark energy of the reinforcement gravel pile reaches a preset elevation;
and S1005, after the gravel pile is formed for 5 days, injecting cement slurry into the hole in the gravel pile from the retained grouting pipe by using a high-pressure grouting pump to form a semi-rigid grouting gravel pile.
In step S1001 in the embodiment of the present invention, constructing a gravel pile construction platform includes the following steps:
s2001, arranging a through self-elevating platform in the middle of a gravel pile construction platform, oppositely arranging a pair of gantry structures on the self-elevating platform, enabling two ends of a main beam of each gantry structure to extend out of the self-elevating platform, horizontally arranging a track on the main beam, and arranging a truss crane on the track to enable the truss crane to move along the length direction of the track;
and S2002, connecting the vibroflot to the truss crane, and enabling the truss crane to drive the vibroflot to move left and right and lift up and down on the gravel pile construction platform.
In step S1002 in the present invention, the grouting pipes are steel pipes or PVC pipes, and the number of the grouting pipes is set to 6.
In step S1003 of the embodiment of the present invention, the method for filling crushed stone includes the following steps:
s3001, determining the pore ratio of dense and piled crushed stones and the expansion degree and viscosity of cement paste for forming cemented crushed stones;
s3002, vibrating by using a vibrator when the pile hole is backfilled with the crushed stone until the porosity ratio of the crushed stone reaches a preset value.
In step S1004, the sleeve outer diameter of the geogrid cylinder is 20mm smaller than the pile hole inner diameter, and the height is 3 m.
In step S1005 of the embodiment of the present invention, the cement slurry is prepared from cement of 32.5 grades or more, the water cement ratio is 0.5, the grouting amount is preferably not less than 1.2 of the specific gravity of the surface grout, and the grouting pressure is 0.5 Mpa.
In step S1005 of the present embodiment, the cement slurry is a self-compacting cement paste.
Example 3
Referring to fig. 1-3, in an embodiment of the present invention, a method for constructing a gravel pile with immersed tube reinforcement for reinforcing a soft foundation includes the following steps:
s1001, building a gravel pile construction platform, dragging and transporting the gravel pile construction platform to a foundation, and arranging a gravel storage bin, a vibroflot and a vibration immersed tube gravel pile machine on the gravel pile construction platform;
s1002, constructing on the ground of a foundation to form a pile hole, and uniformly and circumferentially installing a plurality of grouting pipes in the pile hole, wherein the grouting pipes are 0.2-0.3m higher than the ground so as to facilitate grouting;
s1003, mounting a pile pipe on the vibration immersed tube gravel pile machine, vibrating the immersed tube at a preset position of the foundation, and stopping vibrating after reaching a preset elevation; filling broken stones from a broken stone inlet at the top of the pile pipe, continuously supplementing broken stones in the vibrating pipe-pulling process and controlling the amount of broken stones so that the top surfaces of the broken stones are 4m away from the top of the pile hole;
s1004, placing the manufactured geogrid cylinder from the top of a pile hole, then filling gravels into the opening of the geogrid cylinder to form a reinforcement gravel pile, wherein the amount of the filled gravels ensures that the top mark energy of the reinforcement gravel pile reaches a preset elevation;
and S1005, after the gravel pile is formed for 4 days, injecting cement slurry into the hole in the gravel pile from the retained grouting pipe by using a high-pressure grouting pump to form a semi-rigid grouting gravel pile.
In step S1001 in the embodiment of the present invention, constructing a gravel pile construction platform includes the following steps:
s2001, arranging a through self-elevating platform in the middle of a gravel pile construction platform, oppositely arranging a pair of gantry structures on the self-elevating platform, enabling two ends of a main beam of each gantry structure to extend out of the self-elevating platform, horizontally arranging a track on the main beam, and arranging a truss crane on the track to enable the truss crane to move along the length direction of the track;
and S2002, connecting the vibroflot to the truss crane, and enabling the truss crane to drive the vibroflot to move left and right and lift up and down on the gravel pile construction platform.
In step S1002 in the present invention, the grouting pipes are steel pipes or PVC pipes, and the number of the grouting pipes is set to 5.
In step S1003 of the embodiment of the present invention, the method for filling crushed stone includes the following steps:
s3001, determining the pore ratio of dense and piled crushed stones and the expansion degree and viscosity of cement paste for forming cemented crushed stones;
s3002, vibrating by using a vibrator when the pile hole is backfilled with the crushed stone until the porosity ratio of the crushed stone reaches a preset value.
In step S1004, the sleeve outer diameter of the geogrid cylinder is 15mm smaller than the pile hole inner diameter, and the height is 3 m.
In step S1005 of the embodiment of the present invention, the cement slurry is prepared from cement of 32.5 grades or more, the water cement ratio is 0.4, the grouting amount is preferably not less than 1.2 of the specific gravity of the surface bleeding, and the grouting pressure is 0.2 Mpa.
In step S1005 of the embodiment of the present invention, the cement slurry is an underwater self-protective self-compacting cement paste.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the concept of the present invention, and these are also considered to be within the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (7)
1. A construction method of a immersed tube reinforcement gravel pile for reinforcing a soft foundation is characterized by comprising the following steps:
s1001, building a gravel pile construction platform, dragging and transporting the gravel pile construction platform to a foundation, and arranging a gravel storage bin, a vibroflot and a vibration immersed tube gravel pile machine on the gravel pile construction platform;
s1002, constructing on the ground of a foundation to form a pile hole, and uniformly and circumferentially installing a plurality of grouting pipes in the pile hole, wherein the grouting pipes are 0.2-0.3m higher than the ground so as to facilitate grouting;
s1003, mounting a pile pipe on the vibration immersed tube gravel pile machine, vibrating the immersed tube at a preset position of the foundation, and stopping vibrating after reaching a preset elevation; filling broken stones from a broken stone inlet at the top of the pile pipe, continuously supplementing broken stones in the vibrating pipe-pulling process and controlling the amount of broken stones so that the top surfaces of the broken stones are 3-6m away from the top of the pile hole;
s1004, placing the manufactured geogrid cylinder from the top of a pile hole, then filling gravels into the opening of the geogrid cylinder to form a reinforcement gravel pile, wherein the amount of the filled gravels ensures that the top mark energy of the reinforcement gravel pile reaches a preset elevation;
s1005, after the gravel pile is formed for 3-5 days, injecting cement slurry into the hole of the gravel pile from the retained grouting pipe by using a high-pressure grouting pump to form a semi-rigid grouting gravel pile.
2. The method for constructing the immersed tube reinforcement gravel pile for reinforcing the soft foundation according to claim 1, wherein in the step S1001, the step of constructing the gravel pile construction platform comprises the following steps:
s2001, arranging a through self-elevating platform in the middle of a gravel pile construction platform, oppositely arranging a pair of gantry structures on the self-elevating platform, enabling two ends of a main beam of each gantry structure to extend out of the self-elevating platform, horizontally arranging a track on the main beam, and arranging a truss crane on the track to enable the truss crane to move along the length direction of the track;
and S2002, connecting the vibroflot to the truss crane, and enabling the truss crane to drive the vibroflot to move left and right and lift up and down on the gravel pile construction platform.
3. The method for constructing a sinking pipe reinforcing gravel pile for reinforcing a soft foundation according to claim 1, wherein in step S1002, the grouting pipes are steel pipes or PVC pipes, and 4 to 6 grouting pipes are provided.
4. The method for constructing a sinking pipe reinforcement gravel pile for reinforcing a soft foundation according to claim 1, wherein in the step S1003, the method for pouring gravel comprises the following steps:
s3001, determining the pore ratio of dense and piled crushed stones and the expansion degree and viscosity of cement paste for forming cemented crushed stones;
s3002, vibrating by using a vibrator when the pile hole is backfilled with the crushed stone until the porosity ratio of the crushed stone reaches a preset value.
5. The method for constructing a bored concrete muscle gravel pile for reinforcing a soft foundation according to claim 1, wherein in step S1004, the sleeve outer diameter of the geogrid cylinder is 10 to 20mm smaller than the pile hole inner diameter, and the height is 3 m.
6. The method for constructing a sinking pipe reinforcement gravel pile for reinforcing a soft foundation according to claim 1, wherein in step S1005, the cement paste is prepared from cement of 32.5 or more grades, the water cement ratio is 0.3 to 0.5, the grouting amount is preferably not less than 1.2 of the specific gravity of the surface grout, and the grouting pressure is 0.1 to 0.5 Mpa.
7. The method for constructing a bored concrete reinforcement gravel pile for reinforcing a soft foundation according to claim 1, wherein the cement slurry is one of self-compacting cement mortar, self-compacting cement paste, and underwater self-protecting self-compacting cement paste in step S1005.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110887537.4A CN113585224A (en) | 2021-08-03 | 2021-08-03 | Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation |
| CN202211270932.9A CN115637689A (en) | 2021-08-03 | 2021-08-03 | Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation |
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| CN202110887537.4A CN113585224A (en) | 2021-08-03 | 2021-08-03 | Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation |
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| CN202211270932.9A Division CN115637689A (en) | 2021-08-03 | 2021-08-03 | Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation |
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| CN202211270932.9A Pending CN115637689A (en) | 2021-08-03 | 2021-08-03 | Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114525774A (en) * | 2022-02-10 | 2022-05-24 | 江西省中蔚建设集团有限公司 | Foundation reinforcement construction method |
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| CN101892665A (en) * | 2010-07-27 | 2010-11-24 | 中冶沈勘工程技术有限公司 | Construction method for grouting and vibro-replacement stone pile composite foundation |
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| CN102828498A (en) * | 2012-05-10 | 2012-12-19 | 湖南大学 | Method for constructing gravel pile of hoop of immersed tube for reinforcing soft foundation |
| CN104831699A (en) * | 2015-04-09 | 2015-08-12 | 中交第二航务工程局有限公司 | Self-elevating gravel pile construction platform |
| CN108411889A (en) * | 2018-03-07 | 2018-08-17 | 清华大学 | A kind of cementing broken stone pile of structuring and its construction method |
| CN112281799A (en) * | 2020-10-30 | 2021-01-29 | 华中科技大学 | First-dispersing and later-reinforcing pile construction method and construction device suitable for ultra-soft soil |
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2021
- 2021-08-03 CN CN202110887537.4A patent/CN113585224A/en active Pending
- 2021-08-03 CN CN202211270932.9A patent/CN115637689A/en active Pending
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| JP2011111766A (en) * | 2009-11-25 | 2011-06-09 | Fudo Tetra Corp | Method and apparatus for constructing slag pile |
| CN101892665A (en) * | 2010-07-27 | 2010-11-24 | 中冶沈勘工程技术有限公司 | Construction method for grouting and vibro-replacement stone pile composite foundation |
| CN102828498A (en) * | 2012-05-10 | 2012-12-19 | 湖南大学 | Method for constructing gravel pile of hoop of immersed tube for reinforcing soft foundation |
| CN104831699A (en) * | 2015-04-09 | 2015-08-12 | 中交第二航务工程局有限公司 | Self-elevating gravel pile construction platform |
| CN108411889A (en) * | 2018-03-07 | 2018-08-17 | 清华大学 | A kind of cementing broken stone pile of structuring and its construction method |
| CN112281799A (en) * | 2020-10-30 | 2021-01-29 | 华中科技大学 | First-dispersing and later-reinforcing pile construction method and construction device suitable for ultra-soft soil |
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| CN114525774A (en) * | 2022-02-10 | 2022-05-24 | 江西省中蔚建设集团有限公司 | Foundation reinforcement construction method |
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| CN115637689A (en) | 2023-01-24 |
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Application publication date: 20211102 |