CN113202112A - Assembled foundation pit supporting method - Google Patents
Assembled foundation pit supporting method Download PDFInfo
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- CN113202112A CN113202112A CN202110652991.1A CN202110652991A CN113202112A CN 113202112 A CN113202112 A CN 113202112A CN 202110652991 A CN202110652991 A CN 202110652991A CN 113202112 A CN113202112 A CN 113202112A
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- dovetail groove
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/14—Sealing joints between adjacent sheet piles
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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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
- E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides an assembly type foundation pit supporting method, which comprises the following steps: (1) paying off on site, and determining the position of an inner side line of the foundation pit; (2) moving the construction equipment to enable a positioning device of the construction equipment to be overlapped with the sideline, and then adjusting the vertical positioning device; (3) moving the T-shaped pile to place the T-shaped pile in the positioning device; (4) starting a pile hammer, knocking the T-shaped pile to implant the T-shaped pile into soil, and constructing until the designed elevation of the pile top is reached; (5) transversely moving the construction equipment to move the positioning device to the next pile position, and hoisting a next T-shaped pile into the positioning device again; (6) and after the next T-shaped pile is buckled and connected with the previous T-shaped pile, the pile top is tapped until the elevation of the T-shaped pile is consistent with that of the previous T-shaped pile. The assembly type foundation pit supporting method has the beneficial effects that the adjacent T-shaped piles are assembled in an occlusion mode, the assembly is convenient, the stability is good, the overall structure is strong, and deformation and displacement are not easy to occur.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to an assembly type foundation pit supporting method.
Background
The foundation pit support is a measure for ensuring the safety of underground structure construction and the surrounding environment of the foundation pit, and adopts the support, reinforcement, protection and underground water control on the side wall of the foundation pit and the surrounding environment, so that the stability of the foundation pit and the safety and convenience of operation in the pit can be ensured, and the displacement of a soil body at the bottom of the pit and outside the pit is controlled within a certain range to ensure the normal use of adjacent buildings and municipal facilities.
The existing commonly used foundation pit supporting structure comprises cantilever piles, piles and anchor anchors, piles and internal supports and the like, the deep foundation pit usually adopts a method of piles and internal supports, namely, a waterproof curtain is firstly made on the periphery of the foundation pit, a row of reinforced concrete cast-in-place piles or supporting piles such as prefabricated tubular piles and prefabricated square piles are arranged along the edge of the foundation pit, concrete enclosing purlins (commonly called crown beams) are arranged on the pile tops of the reinforced concrete sheet piles for tie reinforcement, soil bodies are excavated step by step, the internal supports are applied at the designed depth, and the horizontal displacement of the soil bodies on the periphery of the foundation pit is limited. However, the existing support piles are single independent piles, the mutual connection of the support piles is only through the crown beam and the waist beam, the integrity is weak, the economic value of the soil retaining pile cannot be fully exerted, in the excavation process of foundation pit earthwork, the falling of soil between the piles has potential safety hazard, and after the excavation reaches a certain depth, the concrete is sprayed between the piles in a hanging mode. The traditional supporting structure has the disadvantages of long construction period, relatively high construction cost, and relatively high environmental pollution caused by difficulty in controlling construction quality in construction projects.
Disclosure of Invention
The invention overcomes the defects in the prior art and provides the assembled foundation pit supporting method, the adjacent T-shaped piles are assembled in a buckling mode, the occlusion is good, the loosening is not easy to occur, the assembly is convenient, and the stability is good.
In order to solve the technical problems, the invention is realized by the following technical scheme:
an assembled foundation pit supporting method comprises the following steps:
(1) paying off on site, and determining the position of an inner side line of the foundation pit;
(2) moving the construction equipment to enable a positioning device of the construction equipment to be overlapped with the sideline, and then adjusting the vertical positioning device;
(3) moving the T-shaped pile to place the T-shaped pile in the positioning device;
(4) starting a pile hammer, knocking the T-shaped pile, enabling the T-shaped pile to vertically fall along the positioning device, implanting the T-shaped pile into soil, and constructing till the pile top elevation is reached;
(5) transversely moving the construction equipment to move the positioning device to the next pile position, and hoisting a next T-shaped pile into the positioning device again;
(6) buckling and connecting the next T-shaped pile with the previous T-shaped pile, and then tapping the pile top until the elevation of the T-shaped pile is consistent with that of the previous T-shaped pile;
(7) circulating the action steps from the step (2) to the step (6), implanting special corner piles during corner construction, and then circulating the action steps from the step (2) to the step (6) to design a side line round the foundation pit;
(8) the gap between the adjacent T-shaped piles is filled with cement paste, and after the cement paste is solidified, the two piles are tightly occluded without gaps, so that water leakage can be prevented;
(9) manufacturing a connecting beam at the tops of the T-shaped piles and the corner piles to connect the T-shaped piles and the corner piles into a whole;
(10) after the manufacture is finished, soil in the pit can be excavated.
Preferably, one side of the T-shaped pile is provided with a first dovetail groove, and the other side of the T-shaped pile is provided with a second dovetail groove, and the first dovetail groove and the second dovetail groove are used in a matched manner.
Preferably, one side of the corner pile is provided with a third dovetail groove, the other side of the corner pile is provided with a fourth dovetail groove, the third dovetail groove is matched with the second dovetail groove for use, the fourth dovetail groove is matched with the first dovetail groove for use, the middle part of the corner pile is further provided with a fifth dovetail groove, and the fifth dovetail groove is matched with the first dovetail groove for use.
Preferably, the first dovetail groove and the third dovetail groove are male tenons, the calibers of the male tenons are large outside and small inside, the second dovetail groove, the fourth dovetail groove and the fifth dovetail groove are female tenons, and the calibers of the female tenons are small outside and large inside.
Preferably, the first dovetail groove and the third dovetail groove include a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are inclined outward.
Preferably, after the first dovetail groove is inserted into the second dovetail groove, the first dovetail groove and the second dovetail groove surround to form a water-stop grouting position.
Preferably, the T-shaped pile comprises a front plate connecting slope protection and a rear rib retaining pile, and the first dovetail groove and the second dovetail groove are respectively arranged on the left side and the right side of the front plate connecting slope protection.
Preferably, a plurality of through holes are formed in the T-shaped piles and the corner piles respectively, and the through holes penetrate through the T-shaped piles and the corner piles longitudinally.
Preferably, the through-hole is a circular hole.
Compared with the prior art, the invention has the beneficial effects that:
the assembled foundation pit supporting method is characterized in that a plurality of T-shaped piles are sequentially connected to form a foundation pit supporting structure, a first dovetail groove in each T-shaped pile is inserted into a second dovetail groove in an adjacent T-shaped pile to complete connection, when the first dovetail groove is inserted into the second dovetail groove, the first dovetail groove and the second dovetail groove are surrounded to form a water-stopping grouting position, after cement slurry is injected into the water-stopping grouting position and is solidified, the adjacent T-shaped piles are tightly meshed without gaps, water leakage can be prevented, the sealing performance is good, the assembled foundation pit supporting structure is simple and convenient to assemble, and the fixing effect is good.
Drawings
FIG. 1 is a schematic view of a foundation pit support structure;
FIG. 2 is a schematic structural diagram of an assembled state of two adjacent T-shaped piles;
FIG. 3 is a top view of two adjacent T-shaped piles in an assembled state;
fig. 4 is a top view of the corner post.
In the figure: the method comprises the following steps of 1-T-shaped pile, 2-first dovetail groove, 21-first inclined surface, 22-second inclined surface, 3-second dovetail groove, 4-water-stopping grouting position, 5-rear rib retaining pile, 6-through hole, 7-corner pile, 8-third dovetail groove, 9-fourth dovetail groove and 10-fifth dovetail groove.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1, a plurality of T-shaped piles 1 are sequentially connected to form a foundation pit supporting structure in the fabricated foundation pit supporting method, wherein as shown in fig. 2 to 4, the fabricated foundation pit supporting structure comprises a plurality of T-shaped piles 1 sequentially connected, a first dovetail groove 2 is arranged on one side of each T-shaped pile 1, a second dovetail groove 3 is arranged on the other side of each T-shaped pile 1, and the first dovetail groove 2 and the second dovetail groove 3 are used in a matched manner, so that the adjacent T-shaped piles 1 are connected by using the first dovetail groove 2 and the second dovetail groove 3 in a matched manner, the first dovetail groove 2 and the second dovetail groove 3 are longitudinally arranged on the T-shaped piles 1, and as can be seen from fig. 2, the longitudinal lengths of the first dovetail groove 2 and the second dovetail groove 3 are the same as the height of the T-shaped piles 1, so that the adjacent T-shaped piles 1 are tightly connected.
The corner pile is characterized by further comprising a corner pile 7, the corner pile 7 is used for connecting corners, a third dovetail groove 8 is arranged on one side of the corner pile 7, a fourth dovetail groove 9 is arranged on the other side of the corner pile 7, the third dovetail groove 8 is matched with the second dovetail groove 3 for use, the fourth dovetail groove 9 is matched with the first dovetail groove 2 for use, therefore, one side of the corner pile 7 can be flexibly selected to be connected and assembled with the T-shaped pile 1, a fifth dovetail groove 10 is further arranged in the middle of the corner pile 7, the fifth dovetail groove 10 is matched with the first dovetail groove 2 for use, and the corner pile 7 and the T-shaped pile 1 are connected through the fifth dovetail groove 10 and the first dovetail groove 2 to form a 90-degree corner.
The first dovetail groove 2 and the third dovetail groove 8 are male tenons, the calibers of the male tenons are large outside and small inside, the second dovetail groove 3, the fourth dovetail groove 9 and the fifth dovetail groove 10 are female tenons, the calibers of the female tenons are small outside and large inside, the design has a self-locking function, 1T-shaped pile is connected with a plurality of T-shaped piles, force can be transmitted to form resistance, pressure and torsion, and the stability is better.
The first dovetail groove 2 and the third dovetail groove 8 comprise a first inclined surface 21 and a second inclined surface 22, the first inclined surface 21 and the second inclined surface 22 are inclined outwards, namely the first dovetail groove 2 and the third dovetail groove 8 form an inverted triangle shape and are not easy to separate after being respectively connected with the second dovetail groove 3, in addition, as a further preferred embodiment, after the first dovetail groove 2 is inserted into the second dovetail groove 3, the first dovetail groove 2 and the second dovetail groove 3 surround to form a water-stopping grouting position, after cement paste is injected into the water-stopping grouting position and is solidified, adjacent T-shaped piles 1 are tightly meshed without gaps, water leakage can be prevented, and the sealing performance is good.
T type stake 1 includes that the bank protection is connected to the front bezel and back rib retaining pile 5, and first dovetail 2 sets up the left and right sides that the bank protection was connected to the front bezel respectively with second dovetail 3, and back rib retaining pile 5 has 1 overall structure of reinforcing T type stake, improves the effect of holding power, has the effect of bearing interior holding power and extrapolating after inserting the foundation ditch, can also reach in addition and restrict T type stake 1 and take place lateral displacement.
The T-shaped piles 1 and the corner piles 7 are respectively provided with a plurality of through holes 6, the through holes 6 longitudinally penetrate through the T-shaped piles 1 and the corner piles 7, the through holes 6 are used for discharging soil, water or air when the T-shaped piles 1 or the corner piles 7 are vertically driven into the soil, the through holes 6 are circular holes, and the purposes of reducing weight and saving cost can be achieved.
The assembled foundation pit supporting method comprises the following steps:
1. paying off on site, and determining the position of an inner side line of the foundation pit;
2. moving the construction equipment to enable a positioning device of the construction equipment to be overlapped with the side line, and then adjusting the vertical positioning device;
3. moving the T-shaped pile 1 to place the T-shaped pile 1 in the positioning device;
4. starting a pile hammer, knocking the T-shaped pile 1, enabling the T-shaped pile 1 to vertically fall along the positioning device, implanting the T-shaped pile into soil, and constructing till the pile top elevation is reached;
5. transversely moving the construction equipment to move the positioning device to the next pile position, and hoisting the next T-shaped pile 1 into the positioning device again;
6. enabling a first dovetail groove 2 and a second dovetail groove 3 of a T-shaped pile 1 to be mutually meshed on a plane, then adjusting the verticality of the T-shaped pile 1, enabling the T-shaped pile 1 to be vertically erected, enabling the first dovetail groove 2 of the T-shaped pile 1 to be aligned with the second dovetail groove 3 of the previous T-shaped pile 1, then tapping the pile top, enabling the first dovetail groove 2 of the T-shaped pile 1 to be slowly implanted into soil along the mortise and tenon of the previous T-shaped pile 1 until the elevation of the T-shaped pile 1 is consistent with the elevation of the previous T-shaped pile 1;
7. the action steps from 2 to 6 are circulated, when corner construction is carried out, a special corner pile 7 is implanted, a fifth dovetail groove 10 of the corner pile 7 is assembled with the first dovetail groove 2 of the T-shaped pile 1, and a third dovetail groove or a fourth dovetail groove 9 is assembled with the second dovetail groove 3 or the first dovetail groove 2, and then the action steps from 2 to 6 are circulated, and a side line is designed around the foundation pit for one circle;
8. cement slurry is pressed into the water stop grouting position 4, so that the gap between the second dovetail groove 3 and the first dovetail groove 2 is filled with the cement slurry, and after the cement slurry is solidified, the cement slurry is tightly occluded without a gap, so that water leakage can be prevented;
9. a connecting beam is manufactured at the tops of the T-shaped piles 1 and the corner piles 7, so that the T-shaped piles 1 and the corner piles 7 are connected to form a whole;
10. after the manufacture is finished, soil in the pit can be excavated.
The assembled foundation pit supporting structure has the following characteristics:
(1) and (3) environmental protection: the supporting structure avoids water stop of the mixing pile and on-site concrete pouring, and slurry, sewage and dust cannot be generated in the construction process.
(2) Safety: the supporting structure adopts full prefabrication and full assembly, the product quality can be used after being tested and accepted by hundreds of percent, and the safety is guaranteed.
(3) And (3) shortcut: the water stopping, soil retaining and slope protecting integrated supporting structure shortens the construction period. And after construction, the construction method can excavate at once without waiting for the age of the water stopping and soil retaining structures.
(4) Economy: this strut construct stagnant water, keep off soil, bank protection integration, reduced mixing pile stagnant water and domatic shotcrete, and type pile bending resistance is better, the effectual engineering cost that has reduced.
(5) The appearance is beautiful: the -type piles are connected into a whole through the tail steaming groove, and after the piles are excavated, the supporting structure forms a flat and attractive wall surface.
Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. An assembled foundation pit supporting method is characterized by comprising the following steps:
(1) paying off on site, and determining the position of an inner side line of the foundation pit;
(2) moving the construction equipment to enable a positioning device of the construction equipment to be overlapped with the sideline, and then adjusting the vertical positioning device;
(3) moving the T-shaped pile to place the T-shaped pile in the positioning device;
(4) starting a pile hammer, knocking the T-shaped pile, enabling the T-shaped pile to vertically fall along the positioning device, implanting the T-shaped pile into soil, and constructing till the pile top elevation is reached;
(5) transversely moving the construction equipment to move the positioning device to the next pile position, and hoisting a next T-shaped pile into the positioning device again;
(6) buckling and connecting the next T-shaped pile with the previous T-shaped pile, and then tapping the pile top until the elevation of the T-shaped pile is consistent with that of the previous T-shaped pile;
(7) circulating the action steps from the step (2) to the step (6), implanting special corner piles during corner construction, and then circulating the action steps from the step (2) to the step (6) to design a side line round the foundation pit;
(8) the gap between the adjacent T-shaped piles is filled with cement paste, and after the cement paste is solidified, the two piles are tightly occluded without gaps, so that water leakage can be prevented;
(9) manufacturing a connecting beam at the tops of the T-shaped piles and the corner piles to connect the T-shaped piles and the corner piles into a whole;
(10) after the manufacture is finished, soil in the pit can be excavated.
2. An assembled foundation pit supporting method according to claim 1, wherein a first dovetail groove is formed in one side of the T-shaped pile, a second dovetail groove is formed in the other side of the T-shaped pile, and the first dovetail groove and the second dovetail groove are used in a matched mode.
3. An assembled foundation pit supporting method according to claim 2, wherein a third dovetail groove is formed in one side of the corner pile, a fourth dovetail groove is formed in the other side of the corner pile, the third dovetail groove is matched with the second dovetail groove for use, the fourth dovetail groove is matched with the first dovetail groove for use, a fifth dovetail groove is further formed in the middle of the corner pile, and the fifth dovetail groove is matched with the first dovetail groove for use.
4. An assembled foundation pit supporting method according to claim 3, wherein the first dovetail groove and the third dovetail groove are male tenons, the apertures of the male tenons are large outside and small inside, the apertures of the second dovetail groove, the fourth dovetail groove and the fifth dovetail groove are female tenons, and the apertures of the female tenons are small outside and large inside.
5. An assembled foundation pit supporting method according to claim 3, wherein the first dovetail groove and the third dovetail groove comprise a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are inclined outwards.
6. An assembled foundation pit supporting method according to claim 5, wherein after the first dovetail groove is inserted into the second dovetail groove, a water-stopping grouting position is formed by surrounding the first dovetail groove and the second dovetail groove.
7. An assembled foundation pit supporting method according to claim 2, wherein the T-shaped piles comprise a front plate connection revetment and a rear rib retaining pile, and the first dovetail groove and the second dovetail groove are respectively arranged on the left side and the right side of the front plate connection revetment.
8. The method for supporting an assembly type foundation pit according to claim 1, wherein a plurality of through holes are formed in the T-shaped piles and the corner piles respectively, and the through holes penetrate through the T-shaped piles and the corner piles longitudinally.
9. An assembly foundation pit supporting method according to claim 8, wherein the through-hole is a circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110652991.1A CN113202112A (en) | 2021-06-11 | 2021-06-11 | Assembled foundation pit supporting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110652991.1A CN113202112A (en) | 2021-06-11 | 2021-06-11 | Assembled foundation pit supporting method |
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| Publication Number | Publication Date |
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| CN113202112A true CN113202112A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110652991.1A Pending CN113202112A (en) | 2021-06-11 | 2021-06-11 | Assembled foundation pit supporting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832985A (en) * | 2021-09-25 | 2021-12-24 | 浙江省浙南综合工程勘察测绘院有限公司 | Foundation pit structure and construction method thereof |
| CN115404876A (en) * | 2022-08-29 | 2022-11-29 | 中国路桥工程有限责任公司 | Foundation pit supporting structure |
-
2021
- 2021-06-11 CN CN202110652991.1A patent/CN113202112A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832985A (en) * | 2021-09-25 | 2021-12-24 | 浙江省浙南综合工程勘察测绘院有限公司 | Foundation pit structure and construction method thereof |
| CN113832985B (en) * | 2021-09-25 | 2022-11-18 | 浙江省浙南综合工程勘察测绘院有限公司 | Foundation pit structure and construction method thereof |
| CN115404876A (en) * | 2022-08-29 | 2022-11-29 | 中国路桥工程有限责任公司 | Foundation pit supporting structure |
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