CN210622811U - Reinforcing structure for soft stratum of shield foundation - Google Patents
Reinforcing structure for soft stratum of shield foundation Download PDFInfo
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- CN210622811U CN210622811U CN201921477904.8U CN201921477904U CN210622811U CN 210622811 U CN210622811 U CN 210622811U CN 201921477904 U CN201921477904 U CN 201921477904U CN 210622811 U CN210622811 U CN 210622811U
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Abstract
The utility model relates to a shield constructs engineering and consolidates technical field, a reinforced structure in soft stratum of shield base is disclosed, a segmentation is consolidated for the soft stratum zone in shield base is consolidated, a serial communication port, the reinforced structure in soft stratum of shield base is grid formula structure, including the horizontal interval arrangement's of four group at least multi-row piles, the multi-row pile that is located horizontal both sides includes the pile body that at least three rows are horizontal to linking to each other, the multi-row pile that is located the middle part includes two rows at least horizontal continuous pile bodies, be connected with the stull of the vertical interval arrangement of multichannel between two sets of adjacent multi-row piles, the stull includes the many horizontal continuous pile bodies. The utility model discloses can optimize the reinforcement to the soft stratum of shield structure basement, improve shield structure basement bearing capacity and the anti ability of pushing away of side direction, satisfy construction and operation requirement, guarantee the safety during subway operation.
Description
Technical Field
The utility model relates to a shield constructs engineering and consolidates technical field, especially relates to a reinforced structure in soft stratum of shield structure basement.
Background
In the construction of urban subway shield, when the shield tunnel is positioned on a sea-land interactive phase sedimentary silt layer, the geology along the line is complex, the basement rock in the mountain foot area is raised, the stratum difference is large, because the soil layer has high water content, large pore ratio, high compressibility, low shearing strength, low bearing capacity and high sensitivity, consolidation deformation and uneven settlement are easily generated under the action of upper load or vibration, meanwhile, considering that the land blocks around the tunnel are not developed in a large scale at present, the underground water level is reduced in the development process, pore water is squeezed out, soft soil creep deformation can cause ground settlement and single-side bias of the tunnel, and the subsequent engineering development can possibly cause certain influence on the subway tunnel, therefore, in order to ensure the safety when the shield enters and exits the tunnel, the tunnel portal soil body is prevented from flowing into the vertical well, water burst around the portal, sand gushing and upward or sinking when the shield enters and exits the tunnel, the shield must be reinforced before the shield starts, the shield tunneling machine can ensure the safety of shield tunneling, improve the bearing capacity and the lateral thrust resistance of the shield base and ensure the safety of the subway during operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that a reinforced structure of shield structure basement weak stratum is provided, can optimize the reinforcement to shield structure basement weak stratum, guarantee subway operation period safety.
In order to solve the technical problem, the utility model provides a reinforced structure in soft stratum of shield structure basement for carry out the segmentation to the soft stratum region in shield structure basement and consolidate, a serial communication port, the reinforced structure in soft stratum of shield structure basement is grid formula structure, including the horizontal interval arrangement's of four group at least multi-row pile, the multi-row pile that is located horizontal both sides includes the pile body that at least three rows are horizontal to linking to each other, and the multi-row pile that is located the middle part includes two rows at least horizontal continuous pile bodies, is connected with the stull of the vertical interval arrangement of multichannel between two sets of adjacent multi-row piles, the stull includes many horizontal continuous pile bodies.
As the utility model discloses preferred scheme, the multiunit the multi-row stake is horizontal equidistance interval arrangement.
As the utility model discloses preferred scheme, multichannel the stull is vertical equidistance interval arrangement.
As the utility model discloses preferred scheme, the multi-row stake is equipped with four groups, and the multi-row stake that is located horizontal both sides includes three horizontal pile bodies that link to each other, and the multi-row stake that is located the middle part includes two rows of horizontal pile bodies that link to each other.
As the utility model discloses preferred scheme, the six pile bodies of vertically being separated by between adjacent two sets of multi-row pile are equipped with the stull one, the stull includes three horizontal continuous pile bodies.
As the utility model discloses preferred scheme, the pile body of multi-row pile is the triaxial stirring pile body or spouts the pile body soon, the pile body of stull is the triaxial stirring pile body or spouts the pile body soon.
As the utility model discloses preferred scheme works as the pile body of multi-row pile with the pile body of stull is when triaxial stirring pile body and construction difficulty or be applied to the intensive region of pipeline, the pile body of multi-row pile with the pile body of stull is the jet grouting pile body soon.
As the utility model discloses preferred scheme, the real stake height of triaxial stirring pile body is higher than three meters at tunnel top.
As the utility model discloses preferred scheme, spout the real pile height of pile body soon and be higher than one meter at tunnel top.
Implement the utility model discloses a reinforced structure in soft stratum of shield basement compares with prior art, has following beneficial effect:
the utility model discloses a arranging of multi-row pile and stull can optimize the reinforcement to the soft stratum of shield structure basement, improves shield structure basement bearing capacity and the anti ability of pushing away of side direction, satisfies construction and operation requirement, guarantees the safety during subway operation.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
Fig. 1 is a top view of a reinforcing structure for a soft stratum of a shield foundation provided by the present invention;
fig. 2 is a front view of a reinforcing structure for a soft stratum of a shield foundation provided by the present invention.
In the figure: 1. multi-row piles, 2, cross braces, 3 and pile bodies.
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 embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, the utility model discloses a preferred embodiment, a reinforced structure in soft stratum of shield structure basement for carry out the segmentation to the soft stratum region of shield structure basement and consolidate, its characterized in that, the reinforced structure in soft stratum of shield structure basement is grid-type structure, including the multi-row stake 1 of four group's horizontal interval arrangements at least, the multi-row stake 1 that is located horizontal both sides includes the horizontal pile body 3 that links to each other of at least three rows, and the multi-row stake 1 that is located the middle part includes the horizontal pile body 3 that links to each other of at least two rows, is connected with the stull 2 that the vertical interval of multichannel was arranged between the adjacent two sets of multi-row stakes 1, stull 2 includes many horizontal continuous pile body 3. Specifically, the multiunit multi-row pile 1 is horizontal equidistance interval arrangement, multichannel stull 2 is vertical equidistance interval arrangement.
To sum up, the utility model discloses a reinforcing structure of arranging formation grid formula of multi-row pile 1 and stull 2 can optimize the reinforcement to the soft stratum of shield structure basement, improves shield structure basement bearing capacity and side direction anti ability of pushing away, satisfies construction and operation requirement, guarantees the safety during subway operation.
In this embodiment, the piles 1 are four groups, the piles 1 on two lateral sides include three piles 3 connected in the lateral direction, the piles 1 on the middle portion include two rows of piles 3 connected in the lateral direction, a cross brace 2 is arranged between two adjacent piles 1 on six piles 3 spaced apart in the longitudinal direction, and the cross brace 2 includes three piles 3 connected in the lateral direction. By the arrangement, the area replacement rate of the shield tunnel base region is 0.577, the bearing capacity of the composite foundation is 166Kpa, the construction and operation requirements are met, and the safety of the subway during operation can be ensured.
Illustratively, the pile body 3 of multi-row pile 1 and the pile body 3 of stull 2 are triaxial stirring pile bodies, the real pile height of triaxial stirring pile body is higher than three meters at the top of the tunnel. Due to the design, a special three-shaft stirrer is adopted for construction in the construction process, the two shafts rotate in the same direction to spray mortar and mix soil, reverse high-pressure air injection of the middle shaft is fully stirred and mixed with cement soil in the hole, and the gas sprayed out by the middle shaft at high pressure reversely overturns in the soil, so that the originally mixed soil body is more uniform, the pile forming diameter is more effective, the reinforcing effect is more excellent, the construction efficiency of the three-shaft stirring machine is high, the construction period of the relative single-shaft or double-shaft stirring machine is greatly shortened, and manpower and material resources are saved.
Exemplarily, when the pile body 3 of multi-row pile 1 with the pile body 3 of stull 2 is when the triaxial stirring pile body and construction difficulty or is applied to the intensive region of pipeline, the pile body 3 of multi-row pile 1 is the pile body that spouts soon, the pile body 3 of stull 2 is the pile body that spouts soon, and the real pile height of the pile body that spouts soon is higher than one meter in tunnel top. By the design, cement slurry is sprayed into a soil layer and is mixed with a soil body by the high-pressure rotating nozzle in the construction process to form a continuous lapped cement reinforcing body, the construction occupies less land, the vibration is small, the noise is low, and the high-pressure spraying can be randomly changed according to the pile diameter under the pressure. When the grid type three-axis mixing pile reinforcing method is applied to a pipeline dense area, the construction mechanical equipment is large, the requirement on a construction working surface is high, the pipeline is likely to need to be changed in the construction process to meet the requirement, and the pipeline can be well prevented from being changed by adopting the grid type rotary spraying pile body reinforcing method.
In the following, taking the construction of reinforcing the soft stratum of the shield base at a certain road section as an example, there are the following situations:
the first condition is as follows:
the shield structure basement weak stratum region is including left line reinforcement district and right line reinforcement district, be equipped with pipeline such as steel gas pipe, concrete sewer pipe, concrete feed pipe, cast iron feed pipe, concrete downspout, telecommunication pipe, road lamp tube in the left line reinforcement district, consequently, the pile body 3 in the left line reinforcement district is the jet grouting pile body soon, the right line reinforcement district is no pipeline region, consequently, the pile body 3 in the right line reinforcement district is the triaxial stirring pile body.
Case two:
the soft zone region of shield structure basement includes that left side line consolidates district and right side line and consolidates the district, one side in left side line reinforcement district is equipped with the building, consequently, cancels left side line reinforcement district is close to the outside multi-row pile 1 of building, be equipped with pipeline such as plastic gas pipe, concrete sewer pipe, concrete downspout, cast iron water supply pipe, plastics water supply pipe, telecommunications in the left side line reinforcement district, consequently, the pile body 3 in left side line reinforcement district is the jet grouting pile body, the right side line reinforcement district is no pipeline region, consequently, the pile body 3 in right side line reinforcement district is the triaxial stirring pile body.
Case three:
the shield constructs soft zone region of basement including left side line reinforcement district and right side line reinforcement district, left side line reinforcement district with all be equipped with pipelines such as steel gas pipe, plastics sewage pipe, cast iron feed pipe, concrete downspout, telecommunication pipe, way fluorescent tube in the right side line reinforcement district, consequently, left side line reinforcement district with the pile body 3 in right side line reinforcement district is the jet grouting pile body.
Case four:
the soft stratum area of shield structure basement includes that left side line consolidates district and right side line and consolidates the district, left side line consolidates the district and is equipped with the telecommunication pipe, right side line consolidates the district and is equipped with rainwater branch pipe, consequently, the telecommunication pipe with the peripheral pile body 3 of rainwater branch pipe is the jet grouting pile body, left side line consolidates the district with the pile body 3 in all the other regions in right side line consolidates the district is the triaxial stirring pile body.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.
Claims (9)
1. The utility model provides a reinforced structure in soft stratum of shield structure base for carry out the segmentation to the soft stratum region of shield structure base and consolidate, a serial communication port, the reinforced structure in soft stratum of shield structure base is grid formula structure, including four group at least horizontal interval arrangement's multi-row pile, the multi-row pile that is located horizontal both sides includes the pile body that three at least rows of horizontal links to each other, and the multi-row pile that is located the middle part includes the pile body that two at least rows of horizontal links to each other, is connected with the stull that the vertical interval of multichannel was arranged between two sets of adjacent multi-row piles, the stull includes the many pile bodies that transversely link to each other.
2. The reinforcing structure for the weak stratum of the shield base according to claim 1, wherein a plurality of groups of the piles are arranged in a transversely equidistant manner.
3. The reinforcing structure for the weak stratum of the shield base according to claim 2, wherein a plurality of the wales are arranged at equal intervals in the longitudinal direction.
4. The reinforcing structure for a soft stratum of a shield foundation according to claim 2, wherein the plurality of rows of piles are provided in four groups, the plurality of rows of piles located at both lateral sides include three laterally connected piles, and the plurality of rows of piles located at the middle portion include two rows of laterally connected piles.
5. The reinforcing structure for the weak stratum of the shield foundation according to claim 3, wherein a cross brace is provided between two adjacent multi-row piles at intervals of six pile bodies in the longitudinal direction, and the cross brace comprises three pile bodies connected in the transverse direction.
6. The reinforcing structure for a soft stratum of a shield foundation according to any one of claims 1 to 5, wherein the pile bodies of the multiple rows of piles are triaxial mixing pile bodies or jet grouting pile bodies, and the pile bodies of the wales are triaxial mixing pile bodies or jet grouting pile bodies.
7. The reinforcing structure for the soft stratum of the shield base according to claim 6, wherein when the piles of the multi-row piles and the piles of the wales are triaxial mixing piles and construction is difficult or when applied to a dense pipeline area, the piles of the multi-row piles and the piles of the wales are jet grouting piles.
8. The reinforcing structure for the soft stratum of the shield base according to claim 6, wherein the solid pile height of the triaxial mixing pile body is three meters higher than the top of the tunnel.
9. The reinforcing structure for the soft stratum of the shield base according to claim 7, wherein the solid pile height of the jet grouting pile body is one meter higher than the top of the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921477904.8U CN210622811U (en) | 2019-09-05 | 2019-09-05 | Reinforcing structure for soft stratum of shield foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921477904.8U CN210622811U (en) | 2019-09-05 | 2019-09-05 | Reinforcing structure for soft stratum of shield foundation |
Publications (1)
| Publication Number | Publication Date |
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| CN210622811U true CN210622811U (en) | 2020-05-26 |
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| CN201921477904.8U Active CN210622811U (en) | 2019-09-05 | 2019-09-05 | Reinforcing structure for soft stratum of shield foundation |
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| CN (1) | CN210622811U (en) |
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2019
- 2019-09-05 CN CN201921477904.8U patent/CN210622811U/en active Active
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