CN209923935U - Co-location combined pile wall supporting structure in upper-soft and lower-hard stratum - Google Patents
Co-location combined pile wall supporting structure in upper-soft and lower-hard stratum Download PDFInfo
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- CN209923935U CN209923935U CN201920310353.XU CN201920310353U CN209923935U CN 209923935 U CN209923935 U CN 209923935U CN 201920310353 U CN201920310353 U CN 201920310353U CN 209923935 U CN209923935 U CN 209923935U
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Abstract
The utility model provides a go up hard stratum under soft apposition combination pile wall supporting construction, including the upper portion pile body and locate the lower part pile body of upper portion pile body below, wherein, during basement rock was located to upper portion pile body part, during basement rock was located to lower part pile body part, another part stretched into the basement. The utility model discloses reduced the construction degree of difficulty of conventional diaphragm wall and bored pile in hard rock for the efficiency of construction reduces engineering cost, and foot pile wall technology is hung to the conventionality relatively, is applicable to the region that the prestressing anchor cable was used in the restriction, reduces foundation ditch excavation width, reduces foundation ditch construction risk, avoids the percolating water problem because of lock foot anchor cable leads to.
Description
Technical Field
The utility model relates to a supporting construction of foundation ditch construction, especially a keep in touch with combination pile wall supporting construction in hard stratum under soft.
Background
With the great development of high-rise buildings and underground engineering, the scale and the depth of a foundation pit are larger and larger, encountered strata are more and more complex, and particularly, a safe, economic, quick and feasible supporting structure form needs to be found urgently in upper-soft and lower-hard strata so as to reduce the difficulty of pile wall rock-entering construction while ensuring safety.
The upper soft and lower hard foundation pit refers to a foundation pit with a soil layer at the upper part and a bedrock at the lower part in the excavation range of the foundation pit, the bedrock (strong, medium, micro and un-weathered rock) has high strength and good stability, the traditional pile and continuous wall supporting mode is adopted, the construction cost is high, the construction efficiency is low, most of the bedrock sections in the pile wall construction are impacted or rotary-excavated, the noise is large, and mud and the like have great influence on the surrounding environment. And conventional foot-hanging pile generally adopts lock foot anchor rope, even roof beam, from top to bottom staggered platform stake to form and strut the system, owing to stagger the setting of even roof beam, has increased foundation ditch excavation width, causes unnecessary waste, and there are surpassing land red line in the lock foot anchor rope simultaneously, the anchor rope connects the position and should leak water scheduling problem, and when the foundation ditch was nearer apart from peripheral building structure, conventional foot-hanging pile construction will be restricted greatly.
With the rapid development of urban underground space, the size and scale of foundation pits are larger and deeper, the surrounding environment is more and more complex and closer, the conventional pile wall and foot-hanging pile supporting system can not meet the engineering requirements gradually, and the structure of the foundation pit is in urgent need of improvement.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a keep in touch with combination pile wall supporting construction in hard stratum under soft reduces foundation ditch excavation size, cancels the lock foot anchor rope to improve the security and the efficiency of construction of engineering, avoid surpassing the land red line problem.
The technical scheme of the utility model is specifically as follows:
a homothetic combined pile-wall supporting structure in a soft-upper and hard-lower stratum comprises an upper pile body and a lower pile body arranged below the upper pile body, wherein one part of the upper pile body is arranged in bedrock, one part of the lower pile body is arranged in the bedrock, and the other part of the lower pile body extends into a base.
Further, the upper pile body is a continuous wall or a pile.
Further, the lower pile body is a plurality of piles arranged below the continuous wall or a plurality of steel pipe piles arranged below the piles.
Furthermore, reinforcing steel bars are arranged in the upper pile body and the lower pile body.
Furthermore, a concrete layer is arranged on one side of the lower pile body, one end of the concrete layer is located below the pile body, and the other end of the concrete layer is located at the bottom of the bedrock.
Furthermore, the outer side of the upper pile body is provided with a water stopping column.
Compared with the prior art, the beneficial effects of the utility model are specifically as follows:
(1) the construction difficulty of the conventional diaphragm wall and the conventional drilled pile in hard rock is reduced, the construction efficiency is accelerated, the construction cost is reduced, and the defects of low construction efficiency, high cost and the like of the pile wall in the upper-soil-lower-rock stratum can be overcome.
(2) The utility model discloses relative conventionality hangs foot stake wall technology, has avoided conventional anchor rope to hang foot stake fertile groove setting and backfill the problem, reduces the foundation ditch excavation width, reduces the foundation ditch construction risk, avoids the percolating water problem that leads to because of the lock foot anchor rope, and especially the area suitability that uses is stronger in the anchor rope restriction.
The utility model provides a homothetic combined pile-wall supporting structure suitable for a soft upper hard stratum and a hard lower hard stratum (a binary stratum), which is arranged on a common continuous wall or a drilled pile support according to soil and rock properties in a different way, wherein the soil layer part adopts the continuous wall or the drilled pile plus a water stop pile to ensure the stress and the water stop function of the deep foundation pit soil layer part; the rock stratum adopts drilled piles or steel pipe piles, so that the stability of the side wall and the foundation of an upper supporting structure in the rock excavation process are ensured; and the same position and hole arrangement is utilized, the conventional width of the rock shoulder of the foot-hanging pile is cancelled, and the excavation width of the foundation pit is reduced. The utility model provides a apposition combination stake wall supporting construction has reduced the construction degree of difficulty of conventional diaphragm wall and bored pile in hard rock for the efficiency of construction reduces engineering cost, and foot stake wall technology is hung to the conventionality relatively, is applicable to the region that the restriction used prestressed anchorage cable, reduces foundation ditch excavation width, reduces foundation ditch construction risk, avoids the percolating water problem because of lock foot anchor rope leads to.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of FIG. 1;
fig. 3 is a schematic structural diagram of another embodiment of the present invention;
fig. 4 is a side view of fig. 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some examples of the present invention, not all examples. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
Example one
As shown in fig. 1, the homothetic combined pile-wall supporting structure in the upper soft and lower hard stratum of the embodiment includes a continuous wall 2 and two piles 1 arranged below the continuous wall 2, one part of the continuous wall 2 is arranged in bedrock, one part of the two piles 1 is arranged in bedrock 3, and the other part of the two piles extends into a base 4, so that the overlapping length of reinforcing steel bars is met, and the piles are successively hoisted; the steel bars and the steel pipes can be welded with each other to be integrally hoisted, the construction sequence and the hoisting process can be adjusted by combining the actual situation on site, and the steel bars or the steel pipes can be welded to ensure the common stress.
As shown in fig. 2, the continuous wall 2 is internally provided with steel bars 5, the pile 1 is internally provided with steel bars 8, one end of the pile 1 is inserted into the continuous wall 2, one side of the pile 1 is provided with a concrete layer 9, one end of the concrete layer 9 is positioned below the continuous wall 2, and the other end of the concrete layer is positioned at the bottom of the bedrock.
The upper part and the lower part of the structure can consider construction procedures and a steel reinforcement cage hoisting process according to engineering geology and hydrology conditions, and the upper part and the lower part are combined to be subjected to post-grouting process, so that concrete is continuously poured on the upper part and the lower part together, and the rigid joint of the joint position is realized.
The continuous wall 2 and the two piles 1 adopt a mode of continuously pouring concrete, so that the upper part and the lower part form a whole, the upper continuous wall 2 mainly bears lateral water and soil pressure, and the piles 1 at the lower part are used as an upper structure foundation and construct and block side wall rocks to prevent the side wall from collapsing in the excavation process of a foundation pit.
Preferably, the outer side of the continuous wall 2 can be additionally provided with a water-stopping pile according to engineering geology and hydrology conditions, so that the water-stopping and seepage-preventing effects in the upper soil layer range are ensured.
Example two
As shown in fig. 3, in the homothetic combined pile-wall supporting structure in the upper soft and lower hard ground layer of the present embodiment, the upper pile body is a pile 6, the lower pile body is two steel pipe piles 7 arranged below the pile, a steel bar 8 is arranged in the pile 6, the steel bar 8 is connected with the two steel pipe piles 7, and as shown in fig. 4, one end of each of the two steel pipe piles 7 extends into the bottom of the pile 6. The pile column 6 and the two steel pipe piles 7 are supported in the process of foundation pit excavation, a concrete layer 9 is constructed, and a post-grouting process is combined.
The rest is the same as the first embodiment.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the innovative points and principles of the present invention should be included within the scope of the present invention.
Claims (6)
1. The utility model provides an go up apposition combination pile wall supporting construction in soft hard stratum down which characterized in that: the pile foundation comprises an upper pile body and a lower pile body arranged below the upper pile body, wherein one part of the upper pile body is arranged in bedrock, one part of the lower pile body is arranged in the bedrock, and the other part of the lower pile body extends into a substrate.
2. The apposition combination piling wall supporting structure in upper soft and lower hard ground layer according to claim 1, characterized in that: the upper pile body is a continuous wall or a pile.
3. The homothetic combined pile-wall supporting structure in the upper soft and lower hard ground layer according to claim 2, characterized in that: the lower pile body is a plurality of piles arranged below the continuous wall or a plurality of steel pipe piles arranged below the piles.
4. The apposition combination piling wall supporting structure in upper soft and lower hard ground layer according to claim 1, characterized in that: and reinforcing steel bars are arranged in the upper pile body and the lower pile body.
5. The apposition combination piling wall supporting structure in upper soft and lower hard ground layer according to claim 1, characterized in that: and a concrete layer is arranged on one side of the lower pile body, one end of the concrete layer is positioned below the pile body, and the other end of the concrete layer is positioned at the bottom of the bedrock.
6. The apposition combination piling wall supporting structure in upper soft lower hard ground according to one of claims 1 to 5, wherein: the outer side of the upper pile body is provided with a water stopping column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920310353.XU CN209923935U (en) | 2019-03-12 | 2019-03-12 | Co-location combined pile wall supporting structure in upper-soft and lower-hard stratum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920310353.XU CN209923935U (en) | 2019-03-12 | 2019-03-12 | Co-location combined pile wall supporting structure in upper-soft and lower-hard stratum |
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| CN209923935U true CN209923935U (en) | 2020-01-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049117A (en) * | 2020-07-13 | 2020-12-08 | 中铁大桥勘测设计院集团有限公司 | Earth rock binary foundation ditch supporting construction system |
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2019
- 2019-03-12 CN CN201920310353.XU patent/CN209923935U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049117A (en) * | 2020-07-13 | 2020-12-08 | 中铁大桥勘测设计院集团有限公司 | Earth rock binary foundation ditch supporting construction system |
| CN112049117B (en) * | 2020-07-13 | 2022-06-07 | 中铁大桥勘测设计院集团有限公司 | Earth-rock binary foundation pit supporting structure system |
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