CN114753399B - Maintenance structure and construction method for treating coastal high organic matter soft soil foundation by DSM cement mixing piles - Google Patents
Maintenance structure and construction method for treating coastal high organic matter soft soil foundation by DSM cement mixing piles Download PDFInfo
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- CN114753399B CN114753399B CN202210405247.6A CN202210405247A CN114753399B CN 114753399 B CN114753399 B CN 114753399B CN 202210405247 A CN202210405247 A CN 202210405247A CN 114753399 B CN114753399 B CN 114753399B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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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
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a maintenance structure and a construction method for a coastal high organic matter soft soil foundation treated by DSM cement mixing piles, which comprises cement piles, wherein a plurality of cement piles are arranged in the foundation, each cement pile is sleeved with an inner sleeve ring embedded in the foundation, the periphery of the inner sleeve ring is also provided with outer sleeve rings concentric with the inner sleeve ring, a plurality of supporting sheets are uniformly distributed and arranged between the inner sleeve ring and the outer sleeve rings in the circumference, a plurality of pull ropes are fixed on the periphery of each outer sleeve ring, and the pull ropes connected with the outer sleeve rings in adjacent cement piles are mutually and fixedly connected together. Compared with the prior art, the pile body is stable in support, the sinking phenomenon of the cement pile is reduced, the ground cast by the pile body is good in integrity, and ground cracking caused by sliding of a soft soil foundation is not easy to occur.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a maintenance structure and a construction method for treating coastal high organic matter soft soil foundations by using DSM cement mixing piles.
Background
DMS is a technology for treating soft foundation in situ, and is used to mix hardening agent with original foundation soil by deep stirring machine to harden soft foundation and raise foundation strength, permeability and compression resistance. The cement mixing piles formed by the DMS are likely to deviate due to slippage caused by settlement and loss of soft soil foundations, the interaction force among the cement piles is small, and local settlement is easy to generate. And organic substances in coastal high organic soft soil can obstruct cement hydration reaction and influence cement strength.
Therefore, it is necessary to provide a maintenance structure and a construction method for a soft soil foundation of high organic matter in coastal areas for treating a DSM cement mixing pile, so as to solve the problems set forth in the background art.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: the maintenance structure for the coastal high organic matter soft soil foundation is treated by the DSM cement mixing piles, and comprises cement piles, wherein a plurality of cement piles are arranged in the foundation, each cement pile sleeve is provided with an inner sleeve ring embedded in the foundation, the periphery of the inner sleeve ring is also provided with outer sleeve rings concentric with the inner sleeve ring, a plurality of supporting sheets are uniformly distributed between the inner sleeve ring and the outer sleeve ring in circumference, a plurality of pull ropes are fixed on the periphery of each outer sleeve ring, and the pull ropes connected with the outer sleeve rings in the adjacent cement piles are mutually fixedly connected.
Further, preferably, the support piece is rotatably connected between the inner collar and the outer collar.
Further, preferably, two sides of the supporting sheet are provided with arc-shaped slurry outlet grooves which are bent from the center to the side edges, the slurry outlet grooves on two sides of the supporting sheet are respectively bent towards two side edges, and one end, close to the side edges of the supporting sheet, of the slurry outlet grooves is provided with a slurry outlet.
Further, preferably, an annular conduit is embedded in the outer collar, the annular conduit is communicated with each slurry outlet groove, and a grouting conduit is also connected in a penetrating manner in the annular conduit.
Further, preferably, a plurality of resistance thorns are arranged on one surface of the inner sleeve ring, which is close to the cement pile.
Further, preferably, the resistance spike is telescopically disposed within the inner collar by a coupling assembly.
Further, as an preference, the coupling assembly includes a plug shaft, an internal coupling pair is fixed in the plug shaft, the internal coupling pair is a sleeve with threads on the end surface, and is movably embedded in the internal sleeve ring, one end of the inner wall of the internal sleeve ring is fixedly connected with the resistance thorn, an external coupling pair is rotatably sleeved in the plug shaft, the external coupling pair has the same shape as the internal coupling pair, the threaded end surfaces can be mutually coupled, the external coupling pair is fixedly connected with the supporting plate, and the plug shaft is movably embedded in the supporting plate.
A construction method for treating coastal high organic matter soft soil foundation maintenance structure by DSM cement mixing piles comprises
S1, performing leveling and cleaning work on the earth surface, calibrating pile positions by using a total station, and inserting flag marks at the pile positions to ensure that the pile positions are uniformly distributed on the earth surface;
s2, using a pile pressing machine to press the inner collar and the outer collar of the support piece in a vertical state into a preset pile position in alignment with the flag inserting center, wherein the pressing depth is between 1/10 and 2/10 of the preset pile depth;
s3, adjusting the pile driver to enable the drill rod to be vertically aligned with the center of the inner sleeve ring, wherein the verticality deviation is smaller than 1.5%;
s4, driving a motor, cutting soil of a drill rod, sinking, grouting into the drill rod through a grouting system, and circularly drilling and grouting the drill rod at a speed of 1.5 m/min under the pressure of 0.4-0.6 MPa, lifting the drill rod after the elevation of the designed pile bottom is reached, and continuously grouting for 30S after reaching a preset grouting stop surface to lift the ground, and sequentially treating each pile position;
s5, after the cement pile is formed for 12 hours, grouting is carried out between the inner sleeve ring and the outer sleeve ring through a grouting guide pipe at a pressure of 0.1-0.2 MPa, and in the process, the rotating shaft of the supporting sheet generates torque so as to enable the supporting sheet to rotate horizontally, the contact area between the supporting sheet and a soft soil foundation and between the supporting sheet and a concrete layer is increased, and when the supporting sheet rotates, the outer coupling pair is driven to rotate so as to enable the supporting sheet to be staggered with the inner coupling pair, so that the inserting shaft is pushed, the resistance puncture moves towards the center direction of the inner sleeve ring, and the resistance puncture pierces the cement pile;
and S6, after the cement piles are formed for 7 days, connecting the stay ropes exposed out of the ground in each cement pile with the adjacent cement piles through a thread connector and applying a certain pretightening force.
Further, preferably, in S6, eight pull ropes connected in the outer collar are distributed in a shape of a "m", and the cement piles can be connected with four adjacent cement piles and four cement piles at opposite angles through the pull ropes.
Further, preferably, after S6, the plane of the net formed by each pull rope is higher than the planes of the inner collar and the outer collar, and the ground casting is performed on the plane of the pull rope, and the pull ropes are cast into the concrete ground.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, when grouting is carried out simultaneously on the grouting grooves on the two sides of the supporting sheet, the grouting cement paste on the two sides of the supporting sheet extrudes the foundation soil layer and generates torque on the rotating shaft of the supporting sheet, so that the supporting sheet rotates horizontally, the contact area between the supporting sheet and the soft soil foundation and the contact area between the supporting sheet and the supporting sheet are increased, and a stable supporting effect is provided.
In the invention, after the inner sleeve ring and the outer sleeve ring are pressed into the soft soil foundation, grouting is carried out between the inner sleeve ring and the outer sleeve ring through the grouting guide pipe, so that the inner sleeve ring and the outer sleeve ring are integrated, the vertical limiting force of the cement pile and the soft soil foundation is increased, and the sinking phenomenon of the cement pile is reduced.
In the invention, the rest cement piles except the cement piles at the edge can be connected with eight cement piles, so that the interaction force between each cement pile is improved, the pile inclination caused by the surface sliding of the soft soil foundation can be prevented, the connection effect between the concrete floor poured by the pull ropes and the cement piles is strong, the integrity is good, and the ground cracking caused by the sliding of the soft soil foundation is not easy.
Drawings
FIG. 1 is a schematic diagram of a cement mixing pile structure;
FIG. 2 is a schematic structural view of a maintenance structure of a DSM cement mixing pile for treating coastal high organic matter soft soil foundations;
FIG. 3 is a schematic structural view of a coupling assembly;
in the figure: 1. a cement pile; 2. an inner collar; 3. an outer collar; 4. a support sheet; 41. a slurry outlet groove; 5. a pull rope; 6. an annular duct; 7. a coupling assembly; 71. inserting a shaft; 72. an external coupling pair; 73. an internal coupling pair; 8. resistance thorn; 9. grouting guide pipe.
Detailed Description
Referring to fig. 1 to 3, in the embodiment of the invention, a maintenance structure for a high organic matter soft soil foundation along a sea is treated by a DSM cement mixing pile, which comprises cement piles 1, wherein a plurality of cement piles 1 are arranged in the foundation, each cement pile 1 is sleeved with an inner sleeve ring 2 embedded in the foundation, the periphery of the inner sleeve ring 2 is also provided with outer sleeve rings 3 concentric with the inner sleeve ring 2, a plurality of supporting pieces 4 are uniformly distributed and arranged between the inner sleeve ring 2 and the outer sleeve rings 3 in a circumferential manner, a plurality of pull ropes 5 are fixed on the periphery of each outer sleeve ring 3, and the pull ropes 5 connected with the outer sleeve rings 3 in the adjacent cement piles 1 are mutually fixedly connected.
In this embodiment, the supporting piece 4 is rotatably connected between the inner collar 2 and the outer collar 3, and when the inner collar 2 and the outer collar 3 are pressed into the soft foundation, the supporting piece 4 rotates to a vertical state to reduce pressing resistance.
In this embodiment, the two sides of the supporting sheet 4 are provided with arc-shaped slurry outlet grooves 41 that are curved from the center to the side edges, and the slurry outlet grooves 41 on the two sides of the supporting sheet 4 are respectively curved toward the two side edges, and one end of the slurry outlet groove 41, which is close to the side edge of the supporting sheet 4, is provided with a slurry outlet. When grouting is simultaneously performed on the grouting grooves 41 on both sides of the supporting sheet 4, the grouting slurry injected on both sides of the supporting sheet extrudes the foundation soil layer, and torque is generated on the rotating shaft of the supporting sheet 4, so that the supporting sheet rotates horizontally, the contact area between the supporting sheet and the soft soil foundation and the contact area between the supporting sheet and the soft soil layer are increased, and a stable supporting effect is provided.
In this embodiment, the outer collar 3 is embedded with an annular conduit 6, the annular conduit 6 is communicated with each slurry outlet groove 41, and a grouting conduit 9 is also connected in the annular conduit 6. After the inner lantern ring 2 and the outer lantern ring 3 are pressed into the soft foundation, grouting is carried out between the inner lantern ring 2 and the outer lantern ring 3 through the grouting guide pipe 9, the inner lantern ring 2 and the outer lantern ring 3 can form a whole, the vertical limiting force of the cement pile 1 and the soft foundation is increased, and the sinking phenomenon of the cement pile 1 is reduced.
In this embodiment, a plurality of resistance thorns 8 are arranged on one surface of the inner collar 2, which is close to the cement pile 1. The resistance thorns 8 are capable of increasing the interaction force between the inner collar 2 and the cement pile 1.
In this embodiment, the resistance thorn 8 is telescopically arranged in the inner collar 2 by means of the coupling assembly 7.
In this embodiment, the coupling assembly 7 includes a plug shaft 71, an internal coupling pair 73 is fixed in the plug shaft 71, the internal coupling pair 73 is a sleeve with a threaded end surface, and is movably embedded in the internal collar 2, one end of the inner wall of the internal collar 2 is fixedly connected with the resistance thorn 8, an external coupling pair 72 is rotatably sleeved in the plug shaft 71, the external coupling pair 72 and the internal coupling pair 73 have the same shape, the threaded end surfaces can be mutually coupled, the external coupling pair 72 is fixedly connected with the supporting sheet 4, and the plug shaft 71 is movably embedded in the supporting sheet 4. That is, when the supporting plate 4 rotates, the outer coupling pair 72 is driven to rotate so as to be staggered with the inner coupling pair 73, thereby pushing the inserting shaft 71 and the resistance thorn 8 to move towards the center of the circle of the inner collar 2, so that the resistance thorn 8 can penetrate into the cement pile 1.
A construction method for treating coastal high organic matter soft soil foundation maintenance structure by DSM cement mixing piles comprises
S1, performing leveling and cleaning work on the earth surface, calibrating pile positions by using a total station, and inserting flag marks at the pile positions to ensure that the pile positions are uniformly distributed on the earth surface;
s2, using a pile driver to press the inner collar 2 and the outer collar 3 of the support piece 4 in a vertical state into a preset pile position in an aligned mode, wherein the pressing depth is 1/10-2/10 of the preset pile depth;
s3, adjusting the pile driver to enable the drill rod to be vertically aligned with the center of the circle of the inner sleeve ring 2, wherein the verticality deviation is less than 1.5%;
s4, driving a motor, cutting soil of a drill rod, sinking, grouting into the drill rod through a grouting system, and circularly drilling and grouting the drill rod at a speed of 1.5 m/min under the pressure of 0.4-0.6 MPa, lifting the drill rod after the elevation of the designed pile bottom is reached, and continuously grouting for 30S after reaching a preset grouting stop surface to lift the ground, and sequentially treating each pile position;
s5, after piling for 12 hours, grouting is carried out between the inner sleeve ring 2 and the outer sleeve ring 3 by using a grouting guide pipe 9 at a pressure of 0.1-0.2 MPa, and in the process, the rotating shaft of the supporting sheet 4 generates torque so as to rotate horizontally, so that the contact area between the supporting sheet 4 and a soft soil foundation and between the supporting sheet and a concrete layer is increased, and when the supporting sheet 4 rotates, the outer coupling pair 72 is driven to rotate so as to be staggered with the inner coupling pair 73, so that the inserting shaft 71 and the resistance thorn 8 are pushed to move towards the center direction of the inner sleeve ring 2, and the resistance thorn 8 is penetrated into the cement pile 1;
and S6, after piling for 7 days, connecting the stay ropes 5 exposed out of the ground in each cement pile 1 with adjacent cement piles through a thread connector and applying a certain pretightening force.
In the embodiment, in S4, phosphogypsum is added into the cement slurry for grouting, the content of phosphogypsum is 5% of the cement amount, and the influence of organic substances in the soil layer on the cement strength can be reduced.
In this embodiment, in S6, eight stay cords 5 connected in the outer collar 3 are distributed in a "m" shape, and the cement piles 1 can be connected with four adjacent cement piles and four cement piles at opposite angles through the stay cords 5, that is, the cement piles at the edge of the ring of cement piles can be connected with eight cement piles together, so that the interaction force between each cement pile is improved, and the pile inclination caused by the sliding of the soft soil foundation surface can be prevented.
In this embodiment, in S6, the plane of the net formed by each pull rope 5 is higher than the planes of the inner collar 2 and the outer collar 3, and the plane of the pull rope 5 is poured on the ground, and the pull ropes 5 are poured into the concrete ground, so that the poured concrete floor has strong connection effect with the cement pile 1, good integrity, and is not easy to crack due to sliding of the soft soil foundation.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
- The maintenance structure for the coastal high organic matter soft soil foundation is characterized by comprising cement piles (1), wherein a plurality of cement piles (1) are arranged in the foundation, each cement pile (1) is sleeved with an inner sleeve ring (2) embedded in the foundation, outer sleeves (3) concentric with the inner sleeve ring (2) are arranged at the periphery of the inner sleeve ring (2), a plurality of supporting sheets (4) are uniformly distributed and arranged between the inner sleeve ring (2) and the outer sleeves (3) along the circumferential direction, a plurality of pull ropes (5) are fixed at the periphery of each outer sleeve ring (3), and the pull ropes (5) connected with the outer sleeves (3) in the adjacent cement piles (1) are mutually fixedly connected;the supporting piece (4) is rotatably connected between the inner lantern ring (2) and the outer lantern ring (3);arc-shaped slurry outlet grooves (41) which are bent from the center to the side edges are formed in the two sides of the supporting sheet (4), the slurry outlet grooves (41) in the two sides of the supporting sheet (4) are respectively bent towards the two side edges, and a slurry outlet is formed in one end, close to the side edges of the supporting sheet (4), of the slurry outlet groove (41); an annular guide pipe (6) is embedded in the outer sleeve (3), the annular guide pipe (6) is communicated with each slurry outlet groove (41), and a grouting guide pipe (9) is also connected in the annular guide pipe (6) in a penetrating way;one surface of the inner sleeve ring (2) close to the cement pile (1) is provided with a plurality of resistance thorns (8), and the resistance thorns (8) are telescopically arranged in the inner sleeve ring (2) through a coupling assembly (7).
- 2. The coastal high organic matter soft soil foundation maintenance structure for treating a DSM cement mixing pile according to claim 1, wherein the coupling assembly (7) comprises an insertion shaft (71), an internal coupling pair (73) is fixed in the insertion shaft (71), the internal coupling pair (73) is a sleeve with a threaded end surface, and is movably embedded in the inner sleeve ring (2), one end of the inner wall of the inner sleeve ring (2) is fixedly connected with the resistance thorn (8), an external coupling pair (72) is rotatably sleeved in the insertion shaft (71), the external coupling pair (72) and the internal coupling pair (73) have the same shape, the threaded end surfaces can be mutually coupled, the external coupling pair (72) is fixedly connected with the supporting sheet (4), and the insertion shaft (71) is movably embedded in the supporting sheet (4).
- 3. The construction method for treating coastal high organic matter soft soil foundation maintenance structure of DSM cement mixing pile according to claim 2, wherein the construction method comprises:s1, performing leveling and cleaning work on the earth surface, calibrating pile positions by using a total station, and inserting flag marks at the pile positions to ensure that the pile positions are uniformly distributed on the earth surface;s2, using a pile driver to press the inner collar (2) and the outer collar (3) of the support sheet (4) in a vertical state into a preset pile position in an aligned mode, wherein the pressing depth is 1/10-2/10 of the preset pile depth;s3, adjusting a pile pressing machine to enable the drill rod to be vertically aligned with the center of the circle of the inner sleeve ring (2), wherein the verticality deviation is smaller than 1.5%;s4, driving a motor, cutting soil of a drill rod, sinking, grouting into the drill rod through a grouting system, and circularly drilling and grouting the drill rod at a speed of 1.5 m/min under the pressure of 0.4-0.6 MPa, lifting the drill rod after the elevation of the designed pile bottom is reached, and continuously grouting for 30S after reaching a preset grouting stop surface to lift the ground, and sequentially treating each pile position;s5, after the cement pile (1) is formed for 12 hours, grouting is carried out between the inner sleeve ring (2) and the outer sleeve ring (3) through a grouting guide pipe (9) under the pressure of 0.1-0.2 MPa, and in the process, the rotating shaft of the supporting sheet (4) generates torque so as to enable the supporting sheet to rotate horizontally, the contact area between the supporting sheet and a soft soil foundation and between the supporting sheet and a concrete layer is increased, and when the supporting sheet (4) rotates, the outer coupling pair (72) is driven to rotate so as to be staggered with the inner coupling pair (73), so that the inserting shaft (71) and the resistance thorn (8) are pushed to move towards the center direction of the inner sleeve ring (2), and the resistance thorn (8) is enabled to penetrate into the cement pile (1);and S6, after the cement piles (1) are formed for 7 days, connecting the stay ropes (5) exposed out of the ground in each cement pile (1) with adjacent cement piles through a thread connector and applying a certain pretightening force.
- 4. A construction method of a maintenance structure of a high organic matter soft soil foundation of a coastal treatment with a DSM cement mixing pile according to claim 3, comprising:s4-1, adding phosphogypsum into the cement slurry used for grouting in S4, wherein the content of phosphogypsum is 5% of the cement amount.
- 5. A construction method of a maintenance structure of a high organic matter soft soil foundation of a coastal treatment with a DSM cement mixing pile according to claim 3, comprising:s6-1, wherein eight stay ropes (5) connected in the outer sleeve (3) in the S6 are distributed in a shape of a Chinese character 'mi', and the cement piles (1) can be connected with four adjacent cement piles and four cement piles at opposite angles through the stay ropes (5).
- 6. A construction method of a maintenance structure of a high organic matter soft soil foundation of a coastal treatment with a DSM cement mixing pile according to claim 3, comprising:s7, after S6, the plane of the net formed by each stay rope (5) is higher than the planes of the inner lantern ring (2) and the outer lantern ring (3), ground pouring is carried out on the plane of the stay rope (5), and the stay ropes (5) are poured into the concrete ground.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210405247.6A CN114753399B (en) | 2022-04-18 | 2022-04-18 | Maintenance structure and construction method for treating coastal high organic matter soft soil foundation by DSM cement mixing piles |
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| CN202210405247.6A CN114753399B (en) | 2022-04-18 | 2022-04-18 | Maintenance structure and construction method for treating coastal high organic matter soft soil foundation by DSM cement mixing piles |
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| CN114753399B true CN114753399B (en) | 2023-05-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032734A (en) * | 2014-04-29 | 2014-09-10 | 周兆弟 | High-strength triangular plum-blossom-shaped cement soil mixing bearing pile and forming method thereof |
| CN106988300A (en) * | 2017-03-15 | 2017-07-28 | 东南大学 | A kind of soft soil foundation bored concrete pile horizontal bearing reinforcement and its construction method |
| CN109989396A (en) * | 2018-01-03 | 2019-07-09 | 河北工程大学 | In conjunction with the novel extruding-enlarging branch tray molding machine and its operating method of post grouting process |
| CN209603118U (en) * | 2018-12-28 | 2019-11-08 | 南京金桩基础工程有限公司 | A kind of prefabricated pile penetrating layer of sand |
| CN214497780U (en) * | 2021-03-26 | 2021-10-26 | 浙江振昊市政园林工程有限公司 | Construction auxiliary device is prevented subsiding by town road construction underground piping |
-
2022
- 2022-04-18 CN CN202210405247.6A patent/CN114753399B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032734A (en) * | 2014-04-29 | 2014-09-10 | 周兆弟 | High-strength triangular plum-blossom-shaped cement soil mixing bearing pile and forming method thereof |
| CN106988300A (en) * | 2017-03-15 | 2017-07-28 | 东南大学 | A kind of soft soil foundation bored concrete pile horizontal bearing reinforcement and its construction method |
| CN109989396A (en) * | 2018-01-03 | 2019-07-09 | 河北工程大学 | In conjunction with the novel extruding-enlarging branch tray molding machine and its operating method of post grouting process |
| CN209603118U (en) * | 2018-12-28 | 2019-11-08 | 南京金桩基础工程有限公司 | A kind of prefabricated pile penetrating layer of sand |
| CN214497780U (en) * | 2021-03-26 | 2021-10-26 | 浙江振昊市政园林工程有限公司 | Construction auxiliary device is prevented subsiding by town road construction underground piping |
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