CN111197317A - Construction method and structure of foundation cushion under condition of flowing plastic silt soil - Google Patents
Construction method and structure of foundation cushion under condition of flowing plastic silt soil Download PDFInfo
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- CN111197317A CN111197317A CN202010126432.2A CN202010126432A CN111197317A CN 111197317 A CN111197317 A CN 111197317A CN 202010126432 A CN202010126432 A CN 202010126432A CN 111197317 A CN111197317 A CN 111197317A
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- cushion layer
- bearing platform
- foundation
- template
- mat
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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
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- General Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a construction method of a foundation cushion under the condition of flowing plastic silt soil, which comprises the following steps: the method comprises the following steps of (1) constructing a pile foundation in an area to be constructed, and excavating soil around the pile foundation to form a foundation pit and expose part of the pile foundation; pouring concrete at the bottom of the pile foundation to form a cushion layer of the bearing platform; and after the cushion layer of the bearing platform reaches the set strength, erecting a template around the area of the bearing platform to be constructed on the cushion layer of the bearing platform, and pouring the outer side of the template to form a base plate cushion layer, so that a construction space for constructing the bearing platform is formed at the position of the base plate cushion layer corresponding to the pile foundation. The invention effectively solves the problem of difficult construction on the flow plastic sludge soil body, and the bearing platform is constructed after the bottom plate cushion layer is formed through construction, so that the construction speed is accelerated, the soil body is prevented from collapsing, the integral strength of the foundation cushion layer can be enhanced, and the subsequent construction quality is ensured.
Description
Technical Field
The invention relates to the field of building construction, in particular to a construction method and a structure of a foundation cushion layer under the condition of flowing plastic silt soil.
Background
The cushion layer is an intermediate layer between a reinforced concrete foundation and foundation soil and has the functions of leveling the surface of a soil body so as to facilitate binding of reinforcing steel bars on the cushion layer and protecting the foundation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a construction method and a structure of a foundation cushion layer under the condition of flowing plastic silt soil, solves the problem of difficult construction on the flowing plastic silt soil body, and constructs a bearing platform after a bottom plate cushion layer is formed through construction to accelerate the construction speed, prevent the soil body from collapsing, also strengthen the overall strength of the foundation cushion layer and ensure the subsequent construction quality.
The technical scheme for realizing the purpose is as follows:
the invention provides a construction method of a foundation cushion under the condition of flowing plastic silt soil, which comprises the following steps:
the method comprises the following steps of (1) constructing a pile foundation in an area to be constructed, and excavating soil around the pile foundation to form a foundation pit and expose part of the pile foundation;
pouring concrete at the bottom of the foundation pit to form a cushion layer of the bearing platform; and
after the cushion layer of the bearing platform reaches the set strength, a template is erected around the area of the bearing platform to be constructed on the cushion layer of the bearing platform, and a base plate cushion layer is poured outside the template, so that a construction space for the construction bearing platform is formed at the position, corresponding to the pile foundation, of the base plate cushion layer.
The invention provides a construction method of a foundation cushion under a flow-plastic silt soil condition, which comprises the steps of enclosing an area of a cushion to be constructed by using a template after pouring the cushion of the cushion, pouring a cushion of a bottom plate, completing construction of the cushion of the bottom plate and the cushion of the cushion, having a stabilizing effect on a soil body, effectively preventing the soil body from collapsing by correspondingly constructing the cushion and the bottom plate, solving the problem of difficult construction on the flow-plastic silt soil body, constructing the cushion of the bottom plate by constructing the cushion of the bottom plate, accelerating the construction speed, preventing the soil body from collapsing, strengthening the integral strength of the foundation cushion and ensuring the subsequent construction quality.
The construction method of the foundation cushion under the condition of the flowing plastic silt soil is further improved in that when the template is erected, the construction method further comprises the following steps:
and determining the position of the bearing platform to be constructed on the bearing platform cushion layer, and erecting a template along the edge of the bearing platform to be constructed.
The construction method of the foundation cushion under the condition of the plastic-flowing silt soil is further improved in that the elevation of the top of the template is higher than that of the top surface of the foundation pit;
and pouring concrete on the cushion layer of the bearing platform outside the template and the ground outside the foundation pit to form a bottom plate cushion layer.
The construction method of the foundation cushion under the condition of the flowing plastic silt soil is further improved in that the foundation pit is formed by excavating in a mode of slope setting and excavating.
The construction method of the foundation cushion under the condition of the flowing plastic silt soil is further improved in that the cushion layer of the bearing platform and the cushion layer of the bottom plate are both formed by pouring foam concrete.
The construction method of the foundation cushion layer under the condition of the flowing plastic silt soil is further improved in that after the cushion layer of the bearing platform is formed, the construction method further comprises the following steps:
and (5) watering and maintaining the cushion layer of the bearing platform, and arranging a template on the cushion layer of the bearing platform after 6 hours.
The construction method of the foundation cushion layer under the condition of the plastic flow silt soil is further improved in that after the bottom plate cushion layer is formed, the construction method further comprises the following steps:
and (5) watering and maintaining the bottom plate cushion layer, and removing the template after the set strength is reached.
The invention also provides a structure of the foundation mat under the condition of the flowing plastic silt soil, which comprises the following components:
excavating a foundation pit formed corresponding to the erected pile foundation;
pouring a cushion layer of a bearing platform formed at the bottom of the foundation pit, wherein the pile foundation part is exposed out of the cushion layer of the bearing platform; and
and a bottom plate cushion layer formed by pouring on the ground outside the foundation pit and the cushion layer of the bearing platform, wherein the bottom plate cushion layer is partially positioned in the foundation pit and pressed on the cushion layer of the bearing platform, and a construction space for constructing the bearing platform is formed on the part of the bottom plate cushion layer corresponding to the pile foundation.
The structure of the foundation cushion under the condition of the flowing plastic silt soil is further improved in that the cushion layer of the bearing platform and the cushion layer of the bottom plate are both formed by pouring foam concrete.
The structure of the foundation bed under the condition of the flowing plastic silt soil is further improved in that a template is erected around the area of a bearing platform to be constructed on the bearing platform bed, and the elevation of the top of the template is higher than that of the top surface of a foundation pit;
the floor underlayment is formed by casting concrete over the outside of the form.
Drawings
FIG. 1 is a schematic view showing the structure of a foundation mat under a flow-plastic-like muddy soil condition according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the invention provides a construction method of a foundation cushion under a flow-plastic silt soil condition, after a cushion of a bearing platform is poured, a template is used for enclosing an area of the bearing platform to be constructed, a cushion of a bottom plate is poured, the cushion of the bottom plate and the cushion of the bearing platform are both constructed, the soil body is maintained stably, the soil body can be effectively prevented from collapsing corresponding to the construction bearing platform and the bottom plate, the problem of construction difficulty on the flow-plastic silt soil body is solved, the bearing platform is constructed after the cushion of the bottom plate is formed through construction, the construction speed is accelerated, the soil body is prevented from collapsing, the overall strength of the foundation cushion can be enhanced, and the construction quality is ensured. The construction method of the foundation mat under the condition of the flowing plastic silt soil of the invention is explained with the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic view showing the structure of a foundation mat under a flow plastic-like muddy soil condition according to the present invention. The construction method and structure of the foundation mat under the condition of the fluid plastic silt soil of the present invention will be described with reference to fig. 1.
As shown in FIG. 1, the present invention provides a construction method of a foundation mat under a condition of flowing plastic sludge soil, comprising the steps of:
the method comprises the steps of (1) driving a pile foundation 21 in an area to be constructed, and excavating soil around the pile foundation 21 to form a foundation pit 14 and expose part of the pile foundation 21;
pouring concrete at the bottom of the foundation pit 14 to form a bearing platform cushion layer 11; and
after the cushion layer 11 of the bearing platform reaches the set strength, a template 13 is erected around the area of the cushion layer 11 of the bearing platform 211 to be constructed, and a bottom plate cushion layer 12 is formed by pouring on the outer side of the template 13, so that a construction space for the construction of the bearing platform 211 is formed at the position of the bottom plate cushion layer 12 corresponding to the pile foundation 21.
Specifically, the cushion course 11 of the bearing platform and the cushion course 12 of the bottom plate are both cast by foam concrete to reduce the weight of the foundation cushion, thereby preventing the problems of sinking bottom and mud upturning.
Preferably, the proportion of the foam concrete can be adjusted according to geological and meteorological requirements, such as:
and preferably, the cushion layer of the bearing platform is generally poured with the thickness of 200-300 mm, and if precipitation influence is received during pouring and the pouring effect is not ideal, secondary pouring can be adopted, wherein the primary pouring is 15-200 mm, the secondary pouring is 100mm, and the surface folding is completed.
As a preferred embodiment of the present invention, when the formwork 13 is erected, the method further includes:
the position of the bearing platform 211 to be constructed is determined on the bearing platform cushion layer 11, the template 13 is erected along the edge of the bearing platform 211 to be constructed, and the corresponding side surface of the bottom plate cushion layer 12 can be used as the side wall of the bearing platform 211 in the subsequent construction of the bearing platform 211.
Specifically, the top elevation of the template 13 is higher than the top elevation of the foundation pit 21;
concrete is poured on the bearing platform cushion layer 11 outside the template 13 and the ground outside the foundation pit 14 to form a bottom plate cushion layer 12, namely the bottom plate cushion layer 12 is partially positioned on the bearing platform cushion layer 11 and partially positioned on the ground outside the foundation pit 14.
Preferably, the foundation pit 14 is excavated by a slope-making excavation method to prevent the soil from collapsing.
Further, after forming the cushion layer 11 of the cushion cap, the method further comprises:
and (3) watering and maintaining the cushion layer 11 of the bearing platform, and arranging a template 13 on the cushion layer 11 of the bearing platform after 6 hours, wherein the foam concrete can reach the set strength after 6 hours, thereby shortening the construction time and preventing the soil from collapsing.
Specifically, after the bottom plate cushion layer 12 is formed, the method further includes:
and (4) sprinkling water to the bottom plate cushion layer 12 for maintenance, and removing the template 13 after the set strength is reached.
The specific embodiment of the invention is as follows:
the method comprises the following steps of (1) constructing a pile foundation 21 at a position to be constructed, excavating soil around the pile foundation 21 to form a foundation pit 14, and exposing a part of the pile foundation 21 out of the foundation pit 14;
pouring concrete at the bottom of the foundation pit 14 to form a bearing platform cushion layer 11, determining the position of a bearing platform 211 to be constructed on the bearing platform cushion layer 11 after the bearing platform cushion layer 11 reaches a set strength, and erecting a template 13 at the edge of the bearing platform 211 to be constructed;
pouring concrete on the bearing platform cushion layer 11 outside the template 13 and the ground outside the foundation pit 14 to form a bottom plate cushion layer 12, and removing the template 13 after the bottom plate cushion layer 12 reaches a set strength;
a construction floor and cap 211;
namely, after the cushion layer 11 and the cushion layer 12 of the base plate are poured firstly, the base plate and the cushion 211 are constructed, so that the construction time of the foundation cushion structure can be greatly shortened, the soil body is prevented from collapsing during construction, the effect of maintaining the soil body stably is achieved, and the construction quality is ensured.
The invention also provides a structure of the foundation mat layer under the condition of the flowing plastic silt soil, which comprises the following components:
a foundation pit 14 formed by excavation corresponding to the erected pile foundation 21;
pouring a bearing platform cushion layer 11 formed at the bottom of the foundation pit 14, wherein the pile foundation 21 is partially exposed out of the bearing platform cushion layer 11; and
the bottom plate cushion layer 12 formed by pouring on the ground outside the foundation pit 14 and the bearing platform cushion layer 11 is characterized in that the bottom plate cushion layer 12 is partially positioned in the foundation pit 14 and pressed on the bearing platform cushion layer 11, the part of the bottom plate cushion layer 12, corresponding to the pile foundation 21, is formed with a construction space for the construction bearing platform 211, and the structure of the bottom plate cushion layer 12 increases the stress area of the soil body, so that the whole foundation cushion layer is more stable, and the soil body can be effectively prevented from collapsing.
Further, the cushion layer 11 of the bearing platform and the cushion layer 12 of the bottom plate are both formed by pouring foam concrete so as to reduce the weight of the foundation cushion layer and prevent soil from collapsing.
Furthermore, a template 13 is erected around the area of the bearing platform 211 to be constructed on the bearing platform cushion layer 11, and the top elevation of the template 13 is higher than the elevation of the top surface of the foundation pit 14;
the floor mat 12 is formed by casting concrete on the outer side of the formwork 13.
The operation mode of the practical implementation of the structure provided by the invention is as follows:
the method comprises the following steps of (1) constructing a pile foundation 21 at a position to be constructed, excavating soil around the pile foundation 21 to form a foundation pit 14, and exposing a part of the pile foundation 21 out of the foundation pit 14;
pouring concrete at the bottom of the foundation pit 14 to form a bearing platform cushion layer 11, determining the position of a bearing platform 211 to be constructed on the bearing platform cushion layer 11 after the bearing platform cushion layer 11 reaches a set strength, and erecting a template 13 at the edge of the bearing platform 211 to be constructed;
pouring concrete on the bearing platform cushion layer 11 outside the template 13 and the ground outside the foundation pit 14 to form a bottom plate cushion layer 12, and removing the template 13 after the bottom plate cushion layer 12 reaches a set strength;
construction floor and cap 211.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A construction method of a foundation cushion under the condition of flowing plastic silt soil is characterized by comprising the following steps:
the method comprises the steps of (1) setting a pile foundation in an area to be constructed, and excavating soil around the pile foundation to form a foundation pit and expose part of the pile foundation;
pouring concrete at the bottom of the foundation pit to form a cushion layer of the bearing platform; and
and after the cushion layer of the bearing platform reaches the set strength, erecting a template around the area of the bearing platform to be constructed on the cushion layer of the bearing platform, and pouring the template to form a base plate cushion layer, so that a construction space for constructing the bearing platform is formed at the position of the base plate cushion layer corresponding to the pile foundation.
2. The method for constructing a foundation mat under a flow plastic silt condition of claim 1, wherein when erecting the formwork, further comprising:
and determining the position of a bearing platform to be constructed on the bearing platform cushion layer, and erecting the template along the edge of the bearing platform to be constructed.
3. The method for constructing a foundation mat under a flow plastic silt condition of claim 1, wherein the elevation of the top of the formwork is higher than the elevation of the top surface of the foundation pit;
and pouring concrete on the cushion cap layer outside the template and the ground outside the foundation pit to form the bottom plate cushion layer.
4. The method for constructing a foundation mat under a flow plastic silt soil condition of claim 1, wherein the foundation pit is excavated by a slope-making excavation method.
5. The method of constructing a foundation mat under a flow-plastic silt condition according to claim 1, wherein the cap mat and the bottom mat are each cast of foam concrete.
6. A method of constructing a foundation mat under flow-plastic silt conditions as claimed in claim 5, further comprising, after forming said cap mat,:
and (4) watering and maintaining the cushion layer of the bearing platform, and arranging the template on the cushion layer of the bearing platform after 6 hours.
7. A method of constructing a foundation mat under flow plastic silt conditions as claimed in claim 1, further comprising, after forming said bottom mat,:
and (5) watering and maintaining the bottom plate cushion layer, and removing the template after the set strength is reached.
8. A structure of a foundation mat under a flow plastic-like silt soil condition, characterized by comprising:
excavating a foundation pit formed corresponding to the erected pile foundation;
pouring a bearing platform cushion layer formed at the bottom of the foundation pit, wherein the pile foundation part is exposed out of the bearing platform cushion layer; and
and a bottom plate cushion layer formed by pouring on the ground outside the foundation pit and the cushion layer of the bearing platform, wherein the bottom plate cushion layer is partially positioned in the foundation pit and pressed on the cushion layer of the bearing platform, and a construction space for constructing the bearing platform is formed on the part of the bottom plate cushion layer corresponding to the pile foundation.
9. A flow-molded silt soil condition foundation mat structure as set forth in claim 8, wherein said cap mat and said bottom mat are each cast of foam concrete.
10. The structure of a foundation mat under a flow plastic silt condition of claim 8, wherein a template is erected around a region of a bearing platform to be constructed on the bearing platform mat, and the elevation of the top of the template is higher than that of the top surface of the foundation pit;
and pouring concrete on the outer side of the template to form the bottom plate cushion layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126432.2A CN111197317A (en) | 2020-02-28 | 2020-02-28 | Construction method and structure of foundation cushion under condition of flowing plastic silt soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126432.2A CN111197317A (en) | 2020-02-28 | 2020-02-28 | Construction method and structure of foundation cushion under condition of flowing plastic silt soil |
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| Publication Number | Publication Date |
|---|---|
| CN111197317A true CN111197317A (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010126432.2A Pending CN111197317A (en) | 2020-02-28 | 2020-02-28 | Construction method and structure of foundation cushion under condition of flowing plastic silt soil |
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| CN (1) | CN111197317A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653088A (en) * | 2021-06-30 | 2021-11-16 | 中国十九冶集团有限公司 | Construction method for deep foundation pit in coastal silt zone |
-
2020
- 2020-02-28 CN CN202010126432.2A patent/CN111197317A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653088A (en) * | 2021-06-30 | 2021-11-16 | 中国十九冶集团有限公司 | Construction method for deep foundation pit in coastal silt zone |
| CN113653088B (en) * | 2021-06-30 | 2023-09-22 | 中国十九冶集团有限公司 | Construction method for deep foundation pit in coastal silt zone |
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