CN114108647A - Front-mounted bottom plate support replacing system and construction method - Google Patents
Front-mounted bottom plate support replacing system and construction method Download PDFInfo
- Publication number
- CN114108647A CN114108647A CN202111399284.2A CN202111399284A CN114108647A CN 114108647 A CN114108647 A CN 114108647A CN 202111399284 A CN202111399284 A CN 202111399284A CN 114108647 A CN114108647 A CN 114108647A
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- bottom plate
- support
- foundation
- cushion layer
- replacing
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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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
Abstract
The invention discloses a front-mounted bottom plate support replacing system and a construction method, wherein the front-mounted bottom plate support replacing system comprises support piles, a foundation cushion layer, a bottom plate support replacing and a foundation bottom plate; waterproof coiled materials are arranged on the upper surface of the foundation mat layer and the side surfaces of the bottom plate replacing support and the foundation mat layer adjacent to each other. The method comprises the following steps: completing the construction of supporting piles, inter-pile spray anchors and waterproof curtains outside the supporting piles on the peripheral sides of the foundation pit, and confirming the pouring range of the support replacement of the bottom plate; step two: pouring a foundation cushion layer at the bottom of the foundation pit, and pouring a bottom plate at the adjacent position of the foundation cushion layer and the support pile for replacing the support; step three: waterproof coiled materials are laid on the upper surface of the foundation cushion layer and the side surfaces of the bottom plate support and the foundation cushion layer adjacent to each other; and fourthly, constructing a foundation bottom plate on the upper part of the waterproof coiled material, binding reinforcing steel bars, and pouring concrete for forming the foundation bottom plate to form a complete basement bottom plate support changing system. The method solves the problem of water seepage of the foundation pit, omits a module of the foundation slab, and improves the construction efficiency and the safety of the foundation pit system.
Description
Technical Field
The invention relates to the field of constructional engineering construction, in particular to a front-mounted bottom plate support replacing system and a construction method.
Background
At present, along with the gradual change of the development speed of cities, available space is more and more narrow, deep foundation pit projects under complex surrounding environment conditions are more and more, deep foundation pit engineering under soft soil areas and water-rich geological conditions puts extremely high requirements on foundation pit protection, and the deformation control difficulty of a foundation pit support structure is higher. In the process of excavating the foundation pit, the position where the maximum displacement deformation of the foundation pit is generated is the bottom plate of the foundation pit; the stress of the whole foundation pit is changed sharply due to untimely support replacement at the bottom of the foundation pit, and irreversible damage can be caused to the whole supporting system. In addition, under the water-rich geological condition or the soft soil condition, the water leakage among the supporting piles causes huge troubles to the construction of bottom plate waterproofing, brick moulding beds and the like, and the solution of each construction unit is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the front-mounted bottom plate support replacing system and the construction method are provided, so that the external seepage water of the foundation pit is effectively controlled to enter the foundation pit, the construction process is optimized, and the safety protection of the deep foundation pit is ensured.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a front-mounted bottom plate support replacing system comprises support piles, a foundation cushion layer, a bottom plate support replacing device and a foundation bottom plate; a waterproof curtain is arranged on the outer side of the support pile; the method is characterized in that: the foundation cushion layer is arranged on the surface of undisturbed soil and positioned between the support piles; the bottom plate is replaced and supported at the edge of the upper part of the foundation cushion layer and is adjacent to the support piles; waterproof coiled materials are arranged on the upper surface of the foundation mat layer and the side surfaces of the base plate replacing support and the foundation mat layer, and the foundation mat is arranged in a concave structure formed by the waterproof coiled materials.
According to the technical scheme, the height of the base plate support is consistent with the height of the foundation base plate.
According to the technical scheme, the water-stopping device also comprises a water-stopping steel plate; one end of the water-stopping steel plate is embedded in the foundation mat layer, and the other end of the water-stopping steel plate is embedded in the lower support-replacing part of the bottom plate.
According to the technical scheme, the water stop steel plate adopts a structure with a concave section, and the concave opening of the water stop steel plate faces the direction of the support pile.
According to the technical scheme, the bottom plate is changed and props left side edge and be equipped with the arch, and arch, bottom plate are changed the upper surface that props and the fender pile on right side and are constituted the water catch bowl, are equipped with the outlet valve in the arch, and the side of the fender pile on water catch bowl right side is equipped with the drainage tube.
A construction method of the front floor support exchanging system according to any one of claims 1 to 5, wherein: comprises that
The method comprises the following steps: completing the construction of supporting piles, inter-pile spray anchors and waterproof curtains outside the supporting piles on the peripheral sides of the foundation pit, and confirming the pouring range of the support replacement of the bottom plate;
step two: pouring a foundation cushion layer at the bottom of the foundation pit, and pouring a bottom plate at the adjacent position of the foundation cushion layer and the support pile for replacing the support;
step three: waterproof coiled materials are laid on the upper surface of the foundation cushion layer and the side surfaces of the bottom plate support and the foundation cushion layer adjacent to each other;
and fourthly, constructing a foundation bottom plate on the upper part of the waterproof coiled material, binding reinforcing steel bars, and pouring concrete for forming the foundation bottom plate to form a complete basement bottom plate support changing system.
According to the technical scheme, in the second step, when the support of the pouring bottom plate is changed, firstly, a single-side template is arranged on the foundation cushion layer, and the support of the pouring bottom plate is changed by using concrete with the same strength as the foundation cushion layer; when the water collecting tank positioned at the top of the bottom plate support is poured, the top surface of the water collecting tank forms an arc shape.
According to the technical scheme, in the third step, the waterproof coiled material is upwards turned and pasted along the support change of the bottom plate, and the waterproof coiled material is reserved with enough length, so that the waterproof coiled material attached to the outer wall of the structure is effectively protected.
According to the technical scheme, in the step two, when the foundation cushion layer and the bottom plate are poured in a support changing mode, the water stop steel plate is embedded in the construction range of the support changing of the bottom plate.
According to the technical scheme, the water stop steel plates are arranged along the center line of the support replaced by the bottom plate.
The invention has the following beneficial effects:
1. this embodiment adopts the bottom plate to trade the arresting system that props and foundation bed course combines to form, through the clearance between two adjacent fender piles of shutoff to prevent during groundwater from the clearance between the fender pile flows into the foundation ditch, make open water in the foundation ditch bottom significantly reduce, solved the problem of the seepage department shutoff difficulty between the fender pile, the foundation ditch bottom does not have open water, makes the waterproof quality of bottom plate obtain guaranteeing. In addition, in the process of foundation pit construction, the position of the maximum displacement deformation generated by the support pile is the foundation slab of the foundation pit, and the bottom slab replacement support of the embodiment can effectively block the displacement of the support pile at the bottom of the foundation pit before the foundation slab is not formed, so that the safety during foundation construction is greatly improved.
2. The height of the bottom plate replacing support is consistent with the height of the foundation bottom plate, so that a brick forming die does not need to be built in the construction of the foundation bottom plate, the construction material of the bottom plate replacing support can be recycled, the construction cost can be greatly saved, and the construction difficulty is also reduced.
3. After the supporting piles are subjected to inter-pile spray anchoring, water infiltrated from the waterproof curtain flows into the foundation pit along the supporting piles, and the seepage water is discharged through the drainage tubes, so that the lateral force of the supporting piles on the soil side is reduced. The bottom plate trades the arch that props and trades to prop than basal bottom plate and all be higher than a certain height, and the sluicing valve is pre-buried to get into the bottom plate and trade the arch of propping, waits to reach a certain height after the water level in the water catch bowl, discharges from the sluicing valve automatically.
4. Because the waterproof coiled material is upwards turned and pasted along the change of the support of the bottom plate, enough space is reserved for the waterproof coiled material. The waterproof wholeness of basement can be ensured to the laminating of the waterproofing membrane of reserving and the structure outer wall of pouring, has solved the waterproof construction of basement difficult, the problem of low quality.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view at A of the provided embodiment of the invention;
FIG. 3 is an enlarged view at B of the provided embodiment of the invention;
in the figure, 1, a foundation slab; 2. waterproof coiled materials; 3. a base mat layer; 4. undisturbed soil; 5. replacing a support of the bottom plate; 6. a structural exterior wall; 7. spraying anchors among the piles; 8. a waterproof curtain; 9. supporting piles; 10. a water stop steel plate; 11. a drainage tube; 12. a water collection tank; 13. a water drain valve; 14. bump, A, partial view; B. partial view.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 2, the front-mounted bottom plate support replacing system provided by the invention comprises support piles 9, a foundation mat layer 3, a bottom plate support replacing 5 and a foundation bottom plate 1. The waterproof curtain 8 is arranged on the outer side of the support pile and located on the outer side of the foundation pit support pile, and the waterproof curtain is used for forming a wall and preventing underground water outside the foundation pit from seeping into the basement. The foundation cushion layer is arranged on the surface of the undisturbed soil 4 and is positioned between the support piles; the bottom plate is replaced and supported at the edge of the upper part of the foundation cushion layer and is adjacent to the support piles. Waterproof rolls 2 are arranged on the upper surface of the foundation mat layer and the side surfaces of the base plate replacing support and the foundation mat layer adjacent to each other, and the foundation mat is arranged in a concave structure formed by the waterproof rolls. This embodiment adopts the bottom plate to trade the arresting system that props and foundation bed course combines to form, through the clearance between two adjacent fender piles of shutoff to prevent during groundwater from the clearance between the fender pile flows into the foundation ditch, make open water in the foundation ditch bottom significantly reduce, solved the problem of the seepage department shutoff difficulty between the fender pile, the foundation ditch bottom does not have open water, makes the waterproof quality of bottom plate obtain guaranteeing. In addition, in the process of foundation pit construction, the position of the maximum displacement deformation generated by the support pile is the foundation slab of the foundation pit, and the bottom slab replacement support of the embodiment can effectively block the displacement of the support pile at the bottom of the foundation pit before the foundation slab is not formed, so that the safety during foundation construction is greatly improved.
In some embodiments, the floor support is of a height that corresponds to the height of the foundation floor. Carry out foundation ditch construction to soft soil or rich water geology, the bottom plate trades the height that props and the highly uniform of soleplate for soleplate's construction need not to build by laying bricks or stones the child mould, and the soleplate trades the construction material that props and also can have enough to meet the need the use, can practice thrift construction cost greatly, has also reduced the construction degree of difficulty.
In some embodiments, the foundation pad further comprises a water-stop steel plate 10, one end of the water-stop steel plate is embedded in the foundation pad, and the other end of the water-stop steel plate is embedded in the lower portion of the bottom plate support. In this embodiment, the water stop steel plate has a concave cross section, and the concave opening of the water stop steel plate faces the direction of the support pile. The embedded position of the water stop steel plates is arranged on the central line of the bottom plate replacing support, wherein the water stop steel plates are connected through welding. When the bottom plate is poured to replace the support, accumulated water on two sides of the water stop steel plate and interpile seepage objects need to be cleaned up until a concrete surface can effectively block a construction gap formed by pouring the foundation mat layer and the bottom plate in sequence, and the foundation mat layer and the bottom plate are ensured to be replaced and supported to form an effective whole. The foundation condition is better, and when no leakage exists between piles, the water stop steel plate can not be embedded; to the geology comparatively abominable, need trade along the bottom plate and prop the central line and bury the stagnant water steel sheet underground, stagnant water steel sheet opening part orientation upstream face, foundation bed course is pour and is traded pouring that props with the bottom plate and will link up the compactness, pours the preceding, with stagnant water steel sheet both sides clean up, ensures that foundation bed course and bottom plate trade and prop formation wholly.
In some of the above embodiments, the bottom plate is provided with a protrusion 14 with an arc top at the left edge, the protrusion, the upper surface of the bottom plate, and the supporting pile at the right side form a water collecting tank 12, the protrusion is provided with a water drain valve 13, the side surface of the supporting pile at the right side of the water collecting tank is provided with a drainage tube 11, one end of the drainage tube is inserted between the supporting piles, and the other end of the drainage tube is suspended above the water collecting tank. After the piles are subjected to inter-pile spraying and anchoring 7, water infiltrated from the waterproof curtain flows into the foundation pit along the spaces between the supporting piles, and the seepage water is discharged through the drainage tubes, so that the lateral force of the supporting piles on the soil side is reduced. The bottom plate trades the arch that props and trades to prop than basal bottom plate and all be higher than a certain height, and the sluicing valve is pre-buried to get into the bottom plate and trade the arch of propping, waits to reach a certain height after the water level in the water catch bowl, discharges from the sluicing valve automatically.
The invention also provides a construction method of the front-mounted bottom plate support replacing system, which comprises the following steps:
the method comprises the following steps: completing the construction of supporting piles on the periphery of the foundation pit, spray anchors among the piles and waterproof curtains on the outer sides of the supporting piles; and the foundation slab and the structural outer wall 6 are measured, paid off and positioned, and the pouring range of the support change of the slab is confirmed.
Step two: and pouring a foundation cushion layer at the bottom of the foundation pit, and pouring a bottom plate at the position of the foundation cushion layer adjacent to the support pile for replacing the support (comprising a water collecting tank positioned above the bottom plate replacement support).
Step three: waterproof coiled materials are laid on the upper surface of the foundation cushion layer and the side surfaces of the bottom plate support and the foundation cushion layer adjacent to each other;
and fourthly, constructing a foundation bottom plate and a structural outer wall on the upper part of the waterproof coiled material, binding reinforcing steel bars, pouring concrete for forming the foundation bottom plate, and forming a complete basement bottom plate support replacing system.
The method breaks through the idea that in traditional construction, the foundation slab is constructed firstly and then the support of the foundation slab is replaced, and the foundation slab is directly constructed on the foundation cushion layer by replacing the support. The constructed bottom plate is replaced and supported to surround the outer ring of the foundation bed course, and the bottom plate is replaced and supported to effectively control the external water seepage of the foundation pit to enter the foundation pit (foundation bed course), so that the internal working environment of the foundation pit is greatly improved. In addition, the bottom plate that distributes at the foundation bed course trades to prop and serves as the template to the construction of foundation slab for the construction of foundation slab need not to build by laying bricks and mould, and waterproofing membrane also can lay smoothly. The mode of directly constructing the foundation cushion layer by replacing the support of the bottom plate greatly improves the foundation construction of the deep foundation pit under the conditions of soft soil, mucky soil, interbedded soil and rich water, and achieves the effects of fully and effectively improving a plane field, effectively saving cost, optimizing construction procedures and ensuring the safety protection of the deep foundation pit.
In some embodiments, in the second step, when the support of the pouring bottom plate is changed, firstly, a single-side template is arranged on the foundation cushion layer, and the support of the pouring bottom plate is changed by using concrete with the same strength as the foundation cushion layer; when the water collecting tank positioned at the top of the bottom plate support is poured, the top surface of the water collecting tank forms an arc shape.
In some embodiments, in the third step, the waterproof roll is turned over and attached upwards along the support of the bottom plate, and the waterproof roll is reserved with enough length, so that the waterproof roll attached to the outer wall of the structure is effectively protected. Because the waterproof coiled material is upwards turned and pasted along the change of the support of the bottom plate, enough space is reserved for the waterproof coiled material. The waterproof wholeness of basement can be ensured to the laminating of the waterproofing membrane of reserving and the structure outer wall of pouring, has solved the waterproof construction of basement difficult, the problem of low quality.
In some embodiments, in the second step, when the foundation mat and the bottom plate are replaced and supported, the water stop steel plate is embedded in the construction range of the replacement and support of the bottom plate. The foundation condition is better, and when no leakage exists between piles, the water stop steel plate can not be embedded; to the geology comparatively abominable, need trade along the bottom plate and prop the central line and bury the stagnant water steel sheet underground, stagnant water steel sheet opening part orientation upstream face, foundation bed course is pour and is traded pouring that props with the bottom plate and will link up the compactness, pours the preceding, with stagnant water steel sheet both sides clean up, ensures that foundation bed course and bottom plate trade and prop formation wholly. In the embodiment, the water stop steel plates are arranged along the center line of the replaced support of the bottom plate.
The principle of the invention is as follows:
changing the structure of the bottom plate support changing, and pouring the bottom plate support changing on the foundation cushion layer (in the prior art, the bottom plate support changing is poured on the foundation bottom plate); the pre-construction of the bottom plate replacing support can achieve the preset strength before the foundation bottom plate is poured, the local replacing support effect can be achieved after the foundation bottom plate is poured, the foundation bottom plate pouring is completed, the formation of the bottom plate replacing support system is also symbolized, compared with the traditional construction process, the next process is carried out without waiting for the bottom plate to replace the support to achieve the strength, and the next process can be immediately organized.
The structure changes the sequence of replacing the support and pouring of the foundation slab and the bottom slab, so that the bottom slab replacing support and the foundation cushion layer form a template for isolating underground water seepage (the template for pouring the foundation slab) before the foundation slab is poured. In addition, the bottom plate of pouring earlier trades and props, can play certain limited action to the fender pile, prevents to remove in the foundation ditch. The measures not only solve the problem of water seepage of the foundation pit, but also omit a module of the foundation slab, thereby not only achieving the effects of optimizing construction organization and improving construction efficiency, but also achieving the purpose of forming a slab support-changing system in the shortest time, and greatly improving the safety of the foundation pit system.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (10)
1. A front-mounted bottom plate support replacing system comprises support piles, a foundation cushion layer, a bottom plate support replacing device and a foundation bottom plate; a waterproof curtain is arranged on the outer side of the support pile; the method is characterized in that: the foundation cushion layer is arranged on the surface of undisturbed soil and positioned between the support piles; the bottom plate is replaced and supported at the edge of the upper part of the foundation cushion layer and is adjacent to the support piles; waterproof coiled materials are arranged on the upper surface of the foundation mat layer and the side surfaces of the base plate replacing support and the foundation mat layer, and the foundation mat is arranged in a concave structure formed by the waterproof coiled materials.
2. The front mount floor support change system of claim 1, wherein: the height of the bottom plate support is consistent with that of the foundation bottom plate.
3. The front-mounted floor support system according to claim 1 or 2, wherein: still include the stagnant water steel sheet, stagnant water steel sheet one end is buried underground in the foundation mat layer, and the stagnant water steel sheet other end is buried underground and is traded in the bottom plate and prop the lower part.
4. The front mount floor support change system of claim 3, wherein: the water stop steel plate adopts a structure with a concave section, and the concave opening of the water stop steel plate faces the direction of the support pile.
5. The front-mounted floor support system according to claim 1 or 2, wherein: the bottom plate trades and props left side edge and be equipped with the arch, and arch, bottom plate trade the upper surface that props and the fender pile on right side constitute the water catch bowl, are equipped with the sluicing valve in the arch, and the side of the fender pile on water catch bowl right side is equipped with the drainage tube.
6. A construction method of the front floor support exchanging system according to any one of claims 1 to 5, wherein: comprises that
The method comprises the following steps: completing the construction of supporting piles, inter-pile spray anchors and waterproof curtains outside the supporting piles on the peripheral sides of the foundation pit, and confirming the pouring range of the support replacement of the bottom plate;
step two: pouring a foundation cushion layer at the bottom of the foundation pit, and pouring a bottom plate at the adjacent position of the foundation cushion layer and the support pile for replacing the support;
step three: waterproof coiled materials are laid on the upper surface of the foundation cushion layer and the side surfaces of the bottom plate support and the foundation cushion layer adjacent to each other;
and fourthly, constructing a foundation bottom plate on the upper part of the waterproof coiled material, binding reinforcing steel bars, and pouring concrete for forming the foundation bottom plate to form a complete basement bottom plate support changing system.
7. The construction method of the front-mounted floor support replacing system according to claim 6, wherein: in the second step, when the support of the pouring bottom plate is changed, firstly, a single-side template is arranged on the foundation cushion layer, and the support of the pouring bottom plate is changed by using concrete with the same strength as the foundation cushion layer; when the water collecting tank positioned at the top of the bottom plate support is poured, the top surface of the water collecting tank forms an arc shape.
8. The construction method of the front-mounted floor support replacing system according to claim 7, wherein: in the third step, the waterproof coiled material is upwards turned and pasted along the support change of the bottom plate, and the waterproof coiled material is reserved with enough length, so that the waterproof coiled material attached to the outer wall of the structure is effectively protected.
9. The construction method of the front-mounted floor support replacing system according to claim 6, wherein: and in the second step, when pouring of the foundation cushion layer and the bottom plate replacement support is carried out, the water stop steel plate is pre-buried in the construction range of the bottom plate replacement support.
10. The construction method of the front-mounted floor support replacing system according to claim 9, wherein: the water stop steel plate is arranged along the central line of the support replaced by the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111399284.2A CN114108647A (en) | 2021-11-24 | 2021-11-24 | Front-mounted bottom plate support replacing system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111399284.2A CN114108647A (en) | 2021-11-24 | 2021-11-24 | Front-mounted bottom plate support replacing system and construction method |
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| CN114108647A true CN114108647A (en) | 2022-03-01 |
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2021
- 2021-11-24 CN CN202111399284.2A patent/CN114108647A/en active Pending
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