CN216948453U - Waterproof connection node structure of foundation pit mid-board and foundation slab - Google Patents
Waterproof connection node structure of foundation pit mid-board and foundation slab Download PDFInfo
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- CN216948453U CN216948453U CN202220454267.8U CN202220454267U CN216948453U CN 216948453 U CN216948453 U CN 216948453U CN 202220454267 U CN202220454267 U CN 202220454267U CN 216948453 U CN216948453 U CN 216948453U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a waterproof connection node structure of a foundation pit intermediate wall and a foundation slab, which comprises a cast-in-advance foundation slab (1), a cast-in-post concrete layer (2), a first water stop member (4) and a second water stop member (5); the first pouring base plate is positioned on a cushion layer (6) which is firstly made into the foundation pit, a post-pouring cavity is formed at one end of the first pouring base plate, which is connected with the intermediate wall (3), the post-pouring concrete layer is positioned in the post-pouring cavity, and the post-pouring concrete layer and the first pouring base plate form a foundation base plate structure which is firstly made into the foundation pit; the first water stopping member is arranged at one end of the later-poured concrete layer and is positioned at the joint of the later-poured concrete layer and the early-poured foundation slab, and the second water stopping member is arranged at the other end of the later-poured concrete layer and is positioned at the joint of the later-poured concrete layer and the intermediate wall. The waterproof connecting node structure of the intermediate wall and the foundation slab of the foundation pit can avoid cracks between the intermediate wall and the foundation slab, thereby ensuring the waterproof performance between the intermediate wall and the foundation slab.
Description
Technical Field
The utility model relates to a connection structure of adjacent foundation pits, in particular to a waterproof connection node structure of a partition wall and a foundation bottom plate in a foundation pit.
Background
In the construction process of building engineering, along with the utilization ratio of underground space is higher and higher, foundation ditch excavation construction is very general, and adjacent foundation ditch often has the condition of simultaneous construction. In order to ensure the construction safety of the adjacent foundation pits and avoid mutual influence, an intermediate wall is usually arranged between the two adjacent foundation pits.
Because the construction of two adjacent foundation ditches is inequality and asynchronous, for example, foundation ditches A and B on two sides of the intermediate wall are constructed successively, the underground structure of the foundation ditch A is built back and is completed, the earthwork excavation and the underground structure of the foundation ditch B are built back and are constructed, and the like, the intermediate wall is easy to be disturbed and generate displacement inclination in the construction process of the foundation ditch after the construction, and therefore cracks are generated at the connecting nodes of the intermediate wall and the foundation bottom plate of the foundation ditch before the construction. And because the degree of depth of foundation ditch is darker, the pressure of groundwater is great, and groundwater can gush into the basement through the crack under the pressure effect to cause the phenomenon of basement seepage. The crack leaking stoppage work difficulty of underground structure foundation slab and mid-board department is big, and the leaking stoppage effect is not good, can't effectively solve the problem of this department seepage.
Disclosure of Invention
The utility model aims to provide a waterproof connecting joint structure of a foundation pit intermediate wall and a foundation slab, which can avoid cracks between the intermediate wall and the foundation slab so as to ensure the waterproof performance between the intermediate wall and the foundation slab.
The utility model is realized in the following way:
a waterproof connection node structure of a foundation pit intermediate wall and a foundation slab comprises a foundation slab cast first, a concrete layer cast later, a first water stop member and a second water stop member; the first pouring base plate is positioned on the cushion layer of the first foundation pit, a post-pouring cavity is formed at one end, connected with the intermediate wall, of the first pouring base plate, the post-pouring concrete layer is positioned in the post-pouring cavity, and the post-pouring concrete layer and the first pouring base plate form a base plate structure of the first foundation pit; the first water stopping member is arranged at one end of the later-poured concrete layer and is positioned at the joint of the later-poured concrete layer and the early-poured foundation slab, and the second water stopping member is arranged at the other end of the later-poured concrete layer and is positioned at the joint of the later-poured concrete layer and the intermediate wall.
The depth of the post-cast cavity is smaller than the thickness of a foundation slab structure of the foundation pit, namely the thickness of the post-cast concrete layer is smaller than the thickness of the foundation slab structure of the foundation pit, so that the foundation slab structure of the foundation pit is in an L-shaped structure; the length of the post-cast concrete layer is not less than 1 m.
The thickness of the post-cast concrete layer is 2/3 of the thickness of the pre-cast foundation slab.
And a second water stopping component is arranged at the joint of the first pouring foundation bottom plate of the L-shaped structure and the intermediate wall.
The first face reinforcing steel bars are bound in the first pouring foundation bottom plate, the second face reinforcing steel bars are bound in the later pouring concrete layer, and one end of each second face reinforcing steel bar is in lap joint with the corresponding first face reinforcing steel bar.
The lap joint length of the second plate surface reinforcing steel bars and the first plate surface reinforcing steel bars is not less than 10 times of the diameter of the reinforcing steel bars.
The other end of the second plate surface reinforcing steel bar extends into the middle partition wall, and the other end of the second plate surface reinforcing steel bar is in lap joint with the first reinforcing steel bar at the position of the second plate surface reinforcing steel bar elevation in the middle partition wall.
The first pouring foundation bottom plate is bound with plate bottom steel bars, the plate bottom steel bars are located above the cushion layer and extend into the middle partition wall, and the plate bottom steel bars are in lap joint with second steel bars located at the elevation of the plate bottom steel bars in the middle partition wall.
The middle partition wall is bound with a plurality of joint bars, the joint bars are positioned between the top surface and the bottom surface of the foundation slab structure which is used as the foundation pit firstly, and the joint bars respectively extend into the foundation slab which is poured firstly and the concrete layer which is poured later.
And a waterproof layer is arranged between the foundation slab structure of the foundation pit and the cushion layer.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model can provide effective support for the deformed intermediate wall due to the arrangement of the post-cast concrete layer, and simultaneously seal the formed gap between the intermediate wall and the foundation slab structure, thereby avoiding further generating a gap between the intermediate wall and the foundation slab structure which is firstly used as the foundation pit under the disturbance of the construction of the later foundation pit, ensuring the waterproof performance between the intermediate wall and the foundation slab structure, avoiding the technical difficulty and the cost of the later-stage leakage stoppage, and improving the construction quality of the adjacent foundation pits.
2. According to the utility model, because the first plate surface reinforcing steel bars and the second plate surface reinforcing steel bars are arranged in a lap joint manner, and the reinforcing steel bars of the intermediate wall are in lap joint with the reinforcing steel bars of the foundation slab poured first and the concrete layer poured later, the structural strength of the connecting joint of the intermediate wall and the foundation slab structure which is firstly used as the foundation pit is ensured, so that the stability of the intermediate wall is ensured, the disturbance of the intermediate wall in the construction of the later-used foundation pit is reduced, and the construction safety of the adjacent foundation pits is improved.
Drawings
Fig. 1 is a sectional view showing a waterproof connection node structure of a partition wall and a foundation slab of a foundation pit according to the present invention.
In the figure, 1 a foundation slab is poured firstly, 11 first face reinforcing steel bars, 12 bottom reinforcing steel bars, 2 a post-poured concrete layer, 21 second face reinforcing steel bars, 3 an intermediate wall, 31 first reinforcing steel bars, 32 second reinforcing steel bars, 33 dowel bars, 4 first water stopping components, 5 second water stopping components, 6 cushion layers and 7 waterproof layers.
Detailed Description
The utility model is further described with reference to the following figures and specific examples.
Referring to the attached drawing 1, the waterproof connection node structure of the partition wall and the foundation slab of the foundation pit comprises a first poured foundation slab 1, a later poured concrete layer 2, a first water stop member 4 and a second water stop member 5; the first pouring foundation slab 1 is positioned on a cushion layer 6 which is firstly made into a foundation pit, a post-pouring cavity is formed at one end of the first pouring foundation slab 1 connected with the intermediate wall 3, the post-pouring concrete layer 2 is positioned in the post-pouring cavity, and the post-pouring concrete layer 2 and the first pouring foundation slab 1 form a foundation slab structure which is firstly made into the foundation pit; the first water stop member 4 is arranged at one end of the post-cast concrete layer 2 and is positioned at the joint of the post-cast concrete layer 2 and the pre-cast foundation slab 1, and the second water stop member 5 is arranged at the other end of the post-cast concrete layer 2 and is positioned at the joint of the post-cast concrete layer 2 and the intermediate wall 3. Can provide effectual support through the reservation of post-cast cavity and post-cast concrete layer 2 to the mid-board 3 that warp, if produce the gap between mid-board 3 and the foundation slab structure, can fill the gap through post-cast concrete layer 2, avoid the problem that the gap further enlarges or gap department leaks to produce the gap and the seepage between reduction mid-board 3 and the foundation slab structure.
The depth of the post-cast cavity is smaller than the thickness of the foundation slab structure of the foundation pit, namely the thickness of the post-cast concrete layer 2 is smaller than the thickness of the pre-cast foundation slab 1, so that the pre-cast foundation slab 1 is in an L-shaped structure; the length of the post-cast concrete layer 2 is not less than 1 m. Through the pouring of the part of the cast-in-place foundation slab 1 below the post-cast cavity, the effective transmission of horizontal loads between enclosures is ensured after the enclosure supports are dismantled.
The thickness of the post-cast concrete layer 2 is 2/3 the same as that of the pre-cast foundation slab 1, so that the thickness of the foundation slab structure 1/3 of the pre-cast foundation pit is ensured to be used for transmitting horizontal load.
Preferably, the distance between the bottom surface of the later-poured concrete layer 2 and the bottom surface of the early-poured foundation slab 1 is not less than 200mm, so that the effective transmission of horizontal load is ensured.
The junction of the foundation slab 1 poured in advance and the intermediate wall 3 of the L-shaped structure is provided with a second water stopping component 5, and a good waterproof effect is formed between the intermediate wall 3 and the foundation slab 1 poured in advance.
First face reinforcing bar 11 has been ligatured in the foundation slab 1 of watering earlier, the ligature has second face reinforcing bar 21 in the later casting concrete layer 2, the one end and the 11 overlap joints of first face reinforcing bar of second face reinforcing bar 21 ensure that foundation slab 1 of watering earlier pours an organic whole structure with later casting concrete layer 2, guaranteed the wholeness of the foundation slab structure of making the foundation ditch earlier.
Preferably, the overlapping length of the second steel bar 21 and the first steel bar 11 is not less than 10 times of the diameter of the steel bar. The second face reinforcing bar 21 and the first face reinforcing bar 11 can adopt the reinforcing bar of the same specification, and reinforcing bar diameter d can be confirmed according to the construction demand, and the overlap joint length of second face reinforcing bar 21 and first face reinforcing bar 11 is greater than or equal to 10 d.
The other end of second face reinforcing bar 21 extend to in the intermediate wall 3, the other end of second face reinforcing bar 21 and the 3 interior first reinforcing bar 31 overlap joints that are located the 21 elevations of second face reinforcing bar of intermediate wall have guaranteed the structural strength of connected node between intermediate wall 3 and the post-cast concrete layer 2.
Cast earlier in foundation slab 1 in ligature have board end reinforcing bar 12, board end reinforcing bar 12 is located the top of bed course 6 and extends to mid-board 3 in, board end reinforcing bar 12 and mid-board 3 in lie in the second reinforcing bar 32 overlap joint of board end reinforcing bar 12 elevation department, guaranteed mid-board 3 and cast earlier the structural strength of connected node between foundation slab 1.
The intermediate wall 3 in the ligature have a plurality of joint bars 33, a plurality of joint bars 33 are located between the top surface of the foundation slab structure of making the foundation ditch earlier and the bottom surface, and a plurality of joint bars 33 extend to in the foundation slab 1 of watering earlier and the post-cast concrete layer 2 respectively, have further guaranteed intermediate wall 3 and the structural strength of the connected node between foundation slab 1 of watering earlier and the post-cast concrete layer 2.
Preferably, the two insertion ribs 33 are provided, and the distance between the two insertion ribs 33 is 250 mm. The steel bars 33 with the diameter of 16mm are distributed at intervals of 150 mm.
A waterproof layer 7 is arranged between the foundation slab structure of the foundation pit and the cushion layer 6, and the waterproof layer 7 is constructed in a pre-paving and reverse-pasting mode.
The construction method comprises the following steps:
the construction is carried out by firstly manufacturing a foundation pit and a middle partition wall 3, and firstly manufacturing the foundation pit and carrying out pile head treatment, waterproof construction and foundation slab steel bar formwork construction according to normal procedures.
In the foundation slab structure of the foundation pit made first with the thickness of 600mm, a post-cast cavity is reserved within the range of 31 m from the intermediate wall, and the distance from the bottom surface of the post-cast cavity to the cushion layer 6 is 200mm (1/3 of the thickness of the foundation slab structure of the foundation pit made first). Firstly, pouring the foundation slab structure of the foundation pit twice, binding the reinforcing steel bars of the first-poured foundation slab 1, and pouring the first-poured foundation slab 1; and binding the reinforcing steel bars of the post-cast concrete layer 2, and overlapping one end of the second plate surface reinforcing steel bar 21 and the first plate surface reinforcing steel bar 11 by adopting single-side welding, wherein the overlapping length is more than 10 d.
And constructing a foundation pit after construction, and constructing the foundation pit by adopting the prior art, wherein the construction is not repeated here. After the construction of the foundation pit is finished, positive and negative zeros are formed, and the deformation of the intermediate wall 3 is stable, the post-cast concrete layer 2 is poured, the foundation bottom plate structure and the intermediate wall 3 are connected, and the problem that the crack of the joint of the intermediate wall 3 and the foundation bottom plate of the foundation pit is formed in advance due to the deformation of the intermediate wall 3 is solved.
When the first pouring foundation bottom plate 1 and the later pouring concrete layer 2 are poured, a water stop steel plate is adopted as a first water stop member 4 to be arranged at a vertical construction joint of the first pouring foundation bottom plate 1 and the later pouring concrete layer 2; and a rubber water stop strip is adopted as a second water stop member 5 to be arranged at the vertical construction joint of the intermediate wall 3 and the pre-cast foundation slab 1 and the post-cast concrete layer 2.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a foundation ditch mid-board and foundation slab's waterproof connected node structure, characterized by: the construction method comprises the steps of firstly pouring a foundation slab (1), then pouring a concrete layer (2), a first water stop member (4) and a second water stop member (5); the cast-in-place foundation slab (1) is positioned on a cushion layer (6) which is firstly used as a foundation pit, a cast-in-place cavity is formed at one end, connected with the intermediate wall (3), of the cast-in-place foundation slab (1), the cast-in-place concrete layer (2) is positioned in the cast-in-place cavity, and the cast-in-place concrete layer (2) and the cast-in-place foundation slab (1) form a foundation slab structure which is firstly used as the foundation pit; the first water stop member (4) is arranged at one end of the post-cast concrete layer (2) and is positioned at the joint of the post-cast concrete layer (2) and the pre-cast foundation slab (1), and the second water stop member (5) is arranged at the other end of the post-cast concrete layer (2) and is positioned at the joint of the post-cast concrete layer (2) and the intermediate wall (3).
2. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 1, wherein: the depth of the post-cast cavity is smaller than the thickness of the foundation slab structure of the foundation pit, namely the thickness of the post-cast concrete layer (2) is smaller than the thickness of the foundation slab (1) of the foundation pit, so that the foundation slab (1) of the foundation pit is in an L-shaped structure; the length of the post-cast concrete layer (2) is not less than 1 m.
3. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 2, wherein: the thickness of the post-cast concrete layer (2) is 2/3 of the thickness of the pre-cast foundation slab (1).
4. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 2, wherein: a second water stopping component (5) is arranged at the joint of the first pouring foundation slab (1) of the L-shaped structure and the intermediate wall (3).
5. The structure of the waterproof connection node of the foundation pit intermediate wall and the foundation slab as claimed in claim 1 or 2, wherein: the first-poured foundation slab (1) is bound with first slab steel bars (11), the later-poured concrete layer (2) is bound with second slab steel bars (21), and one end of each second slab steel bar (21) is in lap joint with the corresponding first slab steel bar (11).
6. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 5, wherein: the lap joint length of the second plate surface reinforcing steel bars (21) and the first plate surface reinforcing steel bars (11) is not less than 10 times of the diameter of the reinforcing steel bars.
7. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 5, wherein: the other end of second face reinforcing bar (21) extend to in mid-board (3), the other end of second face reinforcing bar (21) and mid-board (3) in be located first reinforcing bar (31) overlap joint of second face reinforcing bar (21) elevation department.
8. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 1, wherein: cast earlier in foundation slab (1) ligature have board bottom reinforcing bar (12), board bottom reinforcing bar (12) are located the top of bed course (6) and extend to mid-board (3) in, second reinforcing bar (32) overlap joint that is located board bottom reinforcing bar (12) elevation place in board bottom reinforcing bar (12) and mid-board (3).
9. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 1 or 8, wherein: the mid-board (3) in ligature have a plurality of round of dowel bars (33), a plurality of round of dowel bars (33) are located and are done between the top surface and the bottom surface of the foundation slab structure of foundation ditch earlier, and a plurality of round of dowel bars (33) extend to respectively and pour foundation slab (1) earlier and post-cast in concrete layer (2).
10. The waterproof connection node structure of the foundation pit intermediate wall and the foundation slab as claimed in claim 1, wherein: a waterproof layer (7) is arranged between the foundation slab structure of the foundation pit and the cushion layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220454267.8U CN216948453U (en) | 2022-03-03 | 2022-03-03 | Waterproof connection node structure of foundation pit mid-board and foundation slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220454267.8U CN216948453U (en) | 2022-03-03 | 2022-03-03 | Waterproof connection node structure of foundation pit mid-board and foundation slab |
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| CN216948453U true CN216948453U (en) | 2022-07-12 |
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| CN202220454267.8U Active CN216948453U (en) | 2022-03-03 | 2022-03-03 | Waterproof connection node structure of foundation pit mid-board and foundation slab |
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