CN113846653A - Prefabricated test block back-pressure foundation pit supporting system and construction method - Google Patents
Prefabricated test block back-pressure foundation pit supporting system and construction method Download PDFInfo
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- CN113846653A CN113846653A CN202111363853.8A CN202111363853A CN113846653A CN 113846653 A CN113846653 A CN 113846653A CN 202111363853 A CN202111363853 A CN 202111363853A CN 113846653 A CN113846653 A CN 113846653A
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- foundation pit
- supporting
- prefabricated test
- piles
- soil
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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
-
- 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
Abstract
The invention provides a supporting system of a prefabricated test block back pressure foundation pit and a construction method thereof, wherein the supporting system comprises the following steps: the system comprises a plurality of supporting piles, a plurality of prefabricated test blocks, a plurality of soil remaining areas and a concrete bottom plate; the supporting piles are distributed along the circumferential direction of the foundation pit; the concrete bottom plate is positioned at the bottom of the foundation pit and has a distance with the support piles; the prefabricated test blocks and the soil remaining area are located between the support piles and the concrete bottom plate and are alternately arranged at intervals along the circumferential direction of the foundation pit. According to the prefabricated test block back-pressure foundation pit supporting system, the plurality of supporting piles, the plurality of prefabricated test blocks, the plurality of soil remaining areas and the concrete bottom plate are arranged, so that back pressure can be formed on a foundation pit by means of the prefabricated test blocks, the foundation pit collapse is avoided, and a sufficient supporting effect is provided for the foundation pit; meanwhile, the prefabricated test block back pressure foundation pit supporting system is simple in structure, low in manufacturing cost and short in construction period.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a prefabricated test block back-pressure foundation pit supporting system and a construction method.
Background
During the construction of the foundation pit, in order to retain soil and stop water so as to ensure the safety of the surrounding environment of the foundation pit, the foundation pit needs to be protected by means of a plurality of supporting systems; however, the existing supporting system has the problems of high manufacturing cost, long construction period, limited supporting and protecting effects on the foundation pit, easiness in foundation pit collapse and the like.
Disclosure of Invention
To achieve the above and other related objects, the present invention provides a prefabricated test block back pressure foundation pit supporting system, comprising: the system comprises a plurality of supporting piles, a plurality of prefabricated test blocks, a plurality of soil remaining areas and a concrete bottom plate; the supporting piles are distributed along the circumferential direction of the foundation pit; the concrete bottom plate is positioned at the bottom of the foundation pit and has a distance with the support piles; the prefabricated test blocks and the soil remaining area are located between the support piles and the concrete bottom plate and are alternately arranged at intervals along the circumferential direction of the foundation pit.
Optionally, the pre-fabricated test block is stepped.
Optionally, the precast test block is a precast concrete block.
Optionally, the support piles are concrete piles. .
Optionally, reinforced soil is filled between adjacent support piles.
Optionally, the top surface of the soil retention area is an inclined surface.
The invention also provides a construction method based on the prefabricated test block back-pressure foundation pit supporting system, which comprises the following steps:
constructing the supporting pile;
placing the slope and digging to the bottom of the pit to form a foundation pit with a soil slope;
forming the concrete bottom plate at the bottom of the foundation pit;
excavating the soil slopes at intervals to form the soil remaining areas, and forming first excavation pits between the adjacent soil remaining areas;
filling prefabricated test blocks in the first excavation to form back pressure;
excavating and removing the soil remaining area to form a second excavation pit, and forming a first concrete plate in the second excavation pit;
and hoisting the precast test block to form a third pit, and forming a second concrete plate in the third pit.
Optionally, the depth of the foundation pit is less than 6 meters.
Optionally, the depth of the foundation pit is 6 meters to 10 meters, and the construction of the support pile further comprises: and (6) slope relief is carried out.
As mentioned above, the prefabricated test block back-pressure foundation pit supporting system and the construction method have the following beneficial effects: according to the prefabricated test block back-pressure foundation pit supporting system, the plurality of supporting piles, the plurality of prefabricated test blocks, the plurality of soil remaining areas and the concrete bottom plate are arranged, so that back pressure can be formed on a foundation pit by means of the prefabricated test blocks, the foundation pit collapse is avoided, and a sufficient supporting effect is provided for the foundation pit; meanwhile, the prefabricated test block back pressure foundation pit supporting system is simple in structure, low in manufacturing cost and short in construction period.
Drawings
Fig. 1 is a schematic top view of a prefabricated test block back-pressure foundation pit supporting system in a foundation pit with a depth of less than 6m in the first embodiment of the invention.
Fig. 2 is a cross-sectional view taken along a line a-a of fig. 1 according to the present invention.
Fig. 3 is a cross-sectional view taken along the line B-B in fig. 1 according to the present invention.
Fig. 4 is a schematic top view of the prefabricated test block back-pressure foundation pit supporting system in a foundation pit with a depth of 6-10 m in the first embodiment of the invention.
Fig. 5 is a cross-sectional view taken along the line C-C of fig. 4 in accordance with the present invention.
Fig. 6 is a cross-sectional view taken along the direction D-D in fig. 4 according to the present invention.
Fig. 7 is a flowchart of a construction method according to a second embodiment of the present invention.
Element number description:
1. the method comprises the following steps of supporting piles, 2, soil remaining areas, 3, concrete bottom plates, 4 and prefabricated test blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
The existing support system has the problems of high manufacturing cost, long construction period, limited support protection effect on the foundation pit, easiness in foundation pit collapse and the like.
Example one
Referring to fig. 1 to 6, the present invention provides a prefabricated test block back-pressure foundation pit supporting system, which includes: the system comprises a plurality of supporting piles 1, a plurality of prefabricated test blocks 4, a plurality of soil remaining areas 2 and a concrete bottom plate 3; a plurality of the support piles 1 are distributed along the circumferential direction of a foundation pit (not shown); the concrete bottom plate 3 is positioned at the bottom of the foundation pit and has a distance with the support piles 1; the precast test blocks 4 and the soil remaining area 2 are located between the support piles 1 and the concrete bottom plate 3 and are alternately arranged at intervals along the circumferential direction of the foundation pit.
According to the prefabricated test block back-pressure foundation pit supporting system, the plurality of supporting piles 1, the plurality of prefabricated test blocks 4, the plurality of soil remaining areas 2 and the concrete bottom plate 3 are arranged, so that back pressure can be formed on a foundation pit by means of the prefabricated test blocks 4, the foundation pit is prevented from collapsing, and a sufficient supporting effect is provided for the foundation pit; meanwhile, the prefabricated test block back pressure foundation pit supporting system is simple in structure, low in manufacturing cost and short in construction period.
In one example, as shown in fig. 1 to 3, the prefabricated block back-pressure foundation pit supporting system can be located in a foundation pit with a depth of less than 6m, and the pile top of the supporting pile 1 is flush with the ground.
In another example, as shown in fig. 4 to 6, the prefabricated block back-pressure foundation pit supporting system can be located in a foundation pit with a depth of 6m to 10m, and the pile top of the supporting pile 1 is lower than the ground.
As an example, as shown in fig. 3 and 6, the pre-test block 4 is stepped; specifically, the thickness of the precast block 4 may be reduced from the edge of the foundation pit to the bottom of the foundation pit in a stepped manner.
More specifically, the precast test blocks 4 are in a ladder shape, in this embodiment, the precast test blocks 4 are stacked in a ladder shape, that is, multiple layers of precast concrete blocks are stacked to form a ladder shape, one side close to the support pile 1 is stacked with three layers of precast concrete blocks, two layers of precast concrete blocks are stacked in sequence, and one layer of precast concrete block is laid.
As an example, the precast block 4 may be a precast concrete block.
As an example, the support pile 1 may be a concrete pile.
As an example, reinforced soil is filled between adjacent ones of the support piles 1.
As shown in fig. 2 and 5, the top surface of the soil retention area 2 is an inclined surface.
Specifically, in the present embodiment, the inclined surface of the top surface of the soil retention area 2 extends from the ground surface to the bottom surface of the foundation pit.
Example two
Referring to fig. 7 in conjunction with fig. 1 to 6, this embodiment further provides a construction method based on the prefabricated test block back-pressure foundation pit supporting system in the first embodiment, where the construction method includes the following steps:
s1: constructing the supporting pile 1;
s2: placing the slope and digging to the bottom of the pit to form a foundation pit with a soil slope;
s3: forming the concrete bottom plate 3 at the bottom of the foundation pit;
s4: excavating the soil slopes at intervals to form the soil remaining areas 2, and forming first excavation pits between the adjacent soil remaining areas 2;
s5: filling the prefabricated test block 4 in the first excavation to form back pressure;
s6: excavating and removing the soil remaining area 2 to form a second excavation, and forming a first concrete plate in the second excavation;
s7: and (4) hoisting the precast test block 4 to form a third pit, and forming a second concrete plate in the third pit.
As an example, as shown in fig. 1 to 3, the depth of the foundation pit is less than 6 meters.
Specifically, the depth of the foundation pit can be 3 meters, 4 meters or 5 meters, and the like.
As an example, as shown in fig. 4 to 6, the depth of the foundation pit is 6 meters to 10 meters, and before the constructing of the support piles, the method further includes: and (6) slope relief is carried out.
Specifically, as shown in fig. 5, the depth of the foundation pit may be 7 meters, 8 meters, or 9 meters, and the like, and the slope is set before the foundation pit is excavated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a shoring system of prefabricated test block backpressure foundation ditch which characterized in that includes: the system comprises a plurality of supporting piles, a plurality of prefabricated test blocks, a plurality of soil remaining areas and a concrete bottom plate; the supporting piles are distributed along the circumferential direction of the foundation pit; the concrete bottom plate is positioned at the bottom of the foundation pit and has a distance with the support piles; the prefabricated test blocks and the soil remaining area are located between the support piles and the concrete bottom plate and are alternately arranged at intervals along the circumferential direction of the foundation pit.
2. The precast block back pressure foundation pit supporting system according to claim 1, wherein: the prefabricated test blocks are in a step shape.
3. The precast block back pressure foundation pit supporting system according to claim 1, wherein: the prefabricated test block is a prefabricated concrete block.
4. The precast block back pressure foundation pit supporting system according to claim 1, wherein: the supporting piles are concrete piles.
5. The precast block back pressure foundation pit supporting system according to claim 1, wherein: and reinforced soil is filled between the adjacent support piles.
6. The precast block back pressure foundation pit supporting system according to claim 1, wherein: the top surface of the soil reserving area is an inclined surface.
7. A construction method based on the prefabricated test block back-pressure foundation pit supporting system of any one of claims 1 to 6, comprising the following steps:
constructing the supporting pile;
placing the slope and digging to the bottom of the pit to form a foundation pit with a soil slope;
forming the concrete bottom plate at the bottom of the foundation pit;
excavating the soil slopes at intervals to form the soil remaining areas, and forming first excavation pits between the adjacent soil remaining areas;
filling prefabricated test blocks in the first excavation to form back pressure;
excavating and removing the soil remaining area to form a second excavation pit, and forming a first concrete plate in the second excavation pit;
and hoisting the precast test block to form a third pit, and forming a second concrete plate in the third pit.
8. The construction method according to claim 7, wherein: the depth of the foundation pit is less than 6 meters.
9. The construction method according to claim 7, wherein: the depth of the foundation pit is 6-10 m, and the construction of the support pile further comprises the following steps: and (6) slope relief is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111363853.8A CN113846653A (en) | 2021-11-17 | 2021-11-17 | Prefabricated test block back-pressure foundation pit supporting system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111363853.8A CN113846653A (en) | 2021-11-17 | 2021-11-17 | Prefabricated test block back-pressure foundation pit supporting system and construction method |
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| CN113846653A true CN113846653A (en) | 2021-12-28 |
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| CN202111363853.8A Pending CN113846653A (en) | 2021-11-17 | 2021-11-17 | Prefabricated test block back-pressure foundation pit supporting system and construction method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869138A (en) * | 2017-03-09 | 2017-06-20 | 中国铁道科学研究院深圳研究设计院 | A kind of load retaining wall Retaining Structure with Double-row Piles and its foundation ditch excavation method |
| CN107299635A (en) * | 2016-04-15 | 2017-10-27 | 中天建设集团有限公司 | A kind of soft soil foundation slope collapse support reinforcement method |
| CN207160019U (en) * | 2017-07-19 | 2018-03-30 | 杨凌示范区市政园林工程有限公司 | A kind of deep pit support protection unit |
| CN108330986A (en) * | 2018-04-11 | 2018-07-27 | 王凯 | Back-pressure de-bowed type pile slab supporting structure and construction method after stake |
| CN111287193A (en) * | 2020-02-19 | 2020-06-16 | 天津大学 | Foundation pit supporting structure utilizing steel sheet piles and concrete precast piles and supporting method thereof |
| CN111576438A (en) * | 2020-05-22 | 2020-08-25 | 广东省水利水电科学研究院 | Support system for deep foundation pit and construction method thereof |
| CN212175815U (en) * | 2020-05-13 | 2020-12-18 | 中信国安建工集团有限公司 | Deep foundation pit supporting structure |
-
2021
- 2021-11-17 CN CN202111363853.8A patent/CN113846653A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299635A (en) * | 2016-04-15 | 2017-10-27 | 中天建设集团有限公司 | A kind of soft soil foundation slope collapse support reinforcement method |
| CN106869138A (en) * | 2017-03-09 | 2017-06-20 | 中国铁道科学研究院深圳研究设计院 | A kind of load retaining wall Retaining Structure with Double-row Piles and its foundation ditch excavation method |
| CN207160019U (en) * | 2017-07-19 | 2018-03-30 | 杨凌示范区市政园林工程有限公司 | A kind of deep pit support protection unit |
| CN108330986A (en) * | 2018-04-11 | 2018-07-27 | 王凯 | Back-pressure de-bowed type pile slab supporting structure and construction method after stake |
| CN111287193A (en) * | 2020-02-19 | 2020-06-16 | 天津大学 | Foundation pit supporting structure utilizing steel sheet piles and concrete precast piles and supporting method thereof |
| CN212175815U (en) * | 2020-05-13 | 2020-12-18 | 中信国安建工集团有限公司 | Deep foundation pit supporting structure |
| CN111576438A (en) * | 2020-05-22 | 2020-08-25 | 广东省水利水电科学研究院 | Support system for deep foundation pit and construction method thereof |
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