CN215715225U - Frame-type ground wall-connecting supporting structure for damming deep foundation pit - Google Patents
Frame-type ground wall-connecting supporting structure for damming deep foundation pit Download PDFInfo
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- CN215715225U CN215715225U CN202122113718.XU CN202122113718U CN215715225U CN 215715225 U CN215715225 U CN 215715225U CN 202122113718 U CN202122113718 U CN 202122113718U CN 215715225 U CN215715225 U CN 215715225U
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Abstract
The utility model relates to the field of supporting of a dam-building deep foundation pit, in particular to a frame-type underground diaphragm wall supporting structure for supporting a horizontal load in a construction period and having a diversion and flow guide function in an operation period, so that the cost is saved. The utility model is particularly suitable for the deep foundation pit supporting design of a hydropower station water inlet and the like which need to have the operation period flow guide function.
Description
Technical Field
The utility model relates to the field of dam construction deep foundation pit supporting, in particular to a frame-grid type ground wall-connected supporting structure of a dam construction deep foundation pit.
Background
The basin in the southwest area has become the main battlefield of the water and electricity development in China at present, the area has the characteristics of complex geological conditions, high earthquake fortification intensity and deep covering layer, a thick weak subjacent layer exists locally, a plurality of technical problems are brought to the dam building, the depth of a foundation pit can reach 40m, particularly the support design of a water inlet is adopted, a support structure simultaneously has two functions of support in the construction period and diversion in the operation period, the traditional high retaining wall has large horizontal load due to the existence of the weak subjacent layer, the requirements on the base anti-skid stability and the deep anti-skid stability are difficult to meet, and the foundation pit slope stability has large risk. Therefore, in the aspect of supporting structure selection, not only the weak underlying layer is treated to reduce the influence of eccentric load so as to avoid overlarge uneven settlement, but also the requirement of supporting horizontal bearing is met. Meanwhile, the upstream surface of the supporting structure is smooth and has the functions of water diversion and flow guide.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a frame-type ground-wall supporting structure for a damming deep foundation pit, which supports a horizontal load in a construction period and has the functions of diversion and diversion in an operation period, thereby saving the cost.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the frame-type underground continuous wall supporting structure for the damming deep foundation pit comprises a frame-type underground continuous wall structure and a hollow box buttress section arranged at the top of the frame-type underground continuous wall structure, wherein the hollow box buttress section comprises a retaining wall internally provided with a hollow box and a buttress structure arranged on the side face of the retaining wall, the buttress structure faces to the horizontal load direction, and the bottom of the frame-type underground continuous wall structure is arranged on a soft lower horizontal layer foundation.
Furthermore, the bottom of the buttress structure and the empty box and the top of the frame-type ground wall structure are integrated.
Further, a top plate is arranged at the top of the frame-type ground wall connecting structure, and the bottom of the buttress structure and the bottom of the empty box and the top plate are of an integral structure.
Further, the buttress structure includes at least one buttress.
Furthermore, the buttresses are uniformly distributed along the horizontal extension direction of the empty box.
The utility model has the beneficial effects that: when the foundation pit is treated in the construction period, the bottom of the frame-type underground diaphragm wall structure is arranged on a soft lower horizontal foundation, so that a good vertical supporting load and a certain horizontal supporting load can be provided. When the horizontal load of the upper part acts on the retaining wall of the hollow box buttress section, certain eccentric load can be generated on the retaining wall base, and because the retaining wall adopts a hollow box structure, the stress balance and the moment balance can be carried out on the side with larger eccentric load, so that the stress of the bottom surface of the retaining wall is more uniformly transmitted to the top plate of the frame-type underground continuous wall structure. Meanwhile, after the soil body on one side of the frame-type underground diaphragm wall structure is excavated, the side surface is smooth, and the water diversion and flow guide functions in the operation period are also achieved. The utility model can effectively control the safety risk of the foundation pit and save investment. The utility model is particularly suitable for the deep foundation pit supporting design of a hydropower station water inlet and the like which need to have the operation period flow guide function.
Drawings
Fig. 1 is a schematic view of the present invention during construction.
Fig. 2 is a schematic illustration of the utility model at run time.
Fig. 3 is a front view of the present invention.
Fig. 4 is a top view of the present invention.
Fig. 5 is a side view of the present invention.
Labeled as: the system comprises an empty box buttress section 1, an empty box 11, a buttress structure 12, a frame-grid type underground diaphragm wall structure 2, a soft lower horizontal layer foundation 21, a horizontal load direction 3, a construction period foundation pit 4 and a water surface 5.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
The frame-type underground diaphragm wall supporting structure for the damming deep foundation pit comprises a frame-type underground diaphragm wall structure 2 and an empty box supporting wall section 1 arranged at the top of the frame-type underground diaphragm wall structure 2, wherein the empty box supporting wall section 1 comprises a retaining wall with an empty box 11 arranged therein and a supporting wall structure 12 arranged on the side face of the retaining wall, the supporting wall structure 12 faces to a horizontal load direction 3, and the bottom of the frame-type underground diaphragm wall structure 2 is arranged on a weak underlying foundation 21.
During actual construction, the bottom of the frame-type underground diaphragm wall supporting structure of the dam-building deep foundation pit is arranged on the weak underlying foundation 21 so as to process the weak foundation. And then pouring a cover plate with a certain thickness on the top of the frame-type underground diaphragm wall structure 2, and finally constructing an empty box buttress section 1 on the top of the cover plate. The frame-type ground wall connecting structure 2 and the empty box buttress section 1 form an integral structure and resist the horizontal load direction 3 together. The horizontal load produces certain vertical load to the ground even wall top surface under the moment effect, is shared by the side frictional resistance and the tip resistance of ground even wall inside and outside. In the operation period, the frame-type diaphragm wall supporting structure of the damming deep foundation pit can be used as a part of the diversion wall while bearing horizontal load, and has the functions of diversion and diversion due to the fact that the outer side surface of the diaphragm wall is smooth.
In order to ensure the integral stability and strength of the frame-type underground diaphragm wall supporting structure of the damming deep foundation pit, the bottom parts of the buttress structure 12 and the hollow box 11 and the top part of the frame-type underground diaphragm wall structure 2 are of an integral structure. It is generally preferred that the top of the frame-type diaphragm wall structure 2 is provided with a top plate, and the bottom of the buttress structure 12 and the empty box 11 is of an integral structure with the top plate. In addition, in order to better realize the water diversion and flow guide functions in the operation period, the outer side surface of the empty box 11 of the empty box buttress section 1 and the outer side surface of the frame-type ground connecting wall structure 2 are preferably in the same plane, as shown in fig. 2, so that a smooth vertical surface is ensured, and the water diversion and flow guide functions are ensured.
In order to fully realize the effect of the buttress structure 12 during actual construction, the buttress structure 12 preferably comprises at least one buttress, so as to ensure the stability of the retaining wall body. Further, in order to provide a more uniform support force for the buttress, it is preferable that the buttress is uniformly distributed along the horizontal extension of the empty box 11.
The utility model can effectively realize the treatment of the weak subjacent layer, reduce the influence of eccentric load, support the horizontal load in the construction period and have the functions of diversion and diversion in the operation period, integrates the two functions, saves the investment, solves the problem that the traditional high retaining wall is difficult to meet the requirements on the base anti-skid stability and the deep anti-skid stability, has very obvious technical advantages and has very wide market popularization prospect.
Claims (5)
1. Frame format ground of deep basal pit of damming is wall supporting construction even, its characterized in that: including frame format ground even wall structure (2) and set up in empty case buttress section (1) at the top of frame format ground even wall structure (2), empty case buttress section (1) is equipped with the barricade of empty case (11) and sets up in buttress structure (12) of barricade side in including, buttress structure (12) are towards horizontal load direction (3), wherein, frame format ground even wall structure (2) bottom sets up on weak subjacent layer ground (21).
2. The frame-type foundation pit wall-connecting supporting structure for damming according to claim 1, wherein: the bottoms of the buttress structures (12) and the empty boxes (11) and the top of the frame-type ground connecting wall structure (2) are integrated.
3. The frame-type foundation pit wall-connecting supporting structure for damming according to claim 2, wherein: the top of the frame-type ground wall structure (2) is provided with a top plate, and the bottoms of the buttress structure (12) and the empty box (11) and the top plate are of an integral structure.
4. The frame-type underground diaphragm wall supporting structure of the damming deep foundation pit as claimed in claim 1, 2 or 3, wherein: the buttress structure (12) includes at least one buttress.
5. The frame-type foundation pit wall-connecting supporting structure for damming according to claim 4, wherein: the buttresses are uniformly distributed along the horizontal extension direction of the empty box (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122113718.XU CN215715225U (en) | 2021-09-02 | 2021-09-02 | Frame-type ground wall-connecting supporting structure for damming deep foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122113718.XU CN215715225U (en) | 2021-09-02 | 2021-09-02 | Frame-type ground wall-connecting supporting structure for damming deep foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215715225U true CN215715225U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122113718.XU Active CN215715225U (en) | 2021-09-02 | 2021-09-02 | Frame-type ground wall-connecting supporting structure for damming deep foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215715225U (en) |
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2021
- 2021-09-02 CN CN202122113718.XU patent/CN215715225U/en active Active
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