CN216712980U - Deep soft soil foundation reinforcing and processing structure combining concrete lattice wall and discrete material piles - Google Patents
Deep soft soil foundation reinforcing and processing structure combining concrete lattice wall and discrete material piles Download PDFInfo
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- CN216712980U CN216712980U CN202122577707.7U CN202122577707U CN216712980U CN 216712980 U CN216712980 U CN 216712980U CN 202122577707 U CN202122577707 U CN 202122577707U CN 216712980 U CN216712980 U CN 216712980U
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Abstract
The utility model provides a deep soft soil foundation reinforcement processing structure combining a concrete lattice wall and discrete material piles, wherein a reinforced concrete lattice wall which is transversely and longitudinally orthogonal is arranged on the deep soft soil foundation; arranging a gravel pile or a sand pile and other discrete material piles in the center of the frame lattice of the concrete lattice wall; the concrete lattice wall and the bottom of the discrete material pile are located on a dense layer at the bottom of the soft foundation or weathered bedrock; and horizontal permeable cushion layers are arranged on the top of the concrete lattice wall and the discrete material piles. Aiming at the condition of a deep soft soil foundation, the utility model provides a reinforcement treatment measure and a reinforcement treatment method which reasonably utilize a rigid reinforcement structure and a flexible reinforcement to jointly reinforce the soft soil foundation and simultaneously create conditions for accelerating drainage and consolidation of basic soft soil and improving the strength of the foundation, thereby realizing that the strength, the bearing capacity and the deformation modulus of the soft soil foundation meet the requirements of an upper structure and a building. Has important significance for the deep soft soil foundation treatment technology under complex conditions.
Description
Technical Field
The utility model relates to the technical field of building, municipal administration and water conservancy engineering, in particular to a deep soft soil foundation reinforcement treatment structure combining a concrete lattice wall and discrete material piles.
Background
The construction of heavy-load structures and buildings on deep soft soil foundations is a frequently encountered engineering technical problem in the engineering fields of buildings, municipal administration, water conservancy and the like, and the strength, bearing capacity and deformation modulus of the soft soil foundations can not meet the requirements of stability and deformation control, so that basic reinforcement treatment measures must be taken to ensure the stability, safety and normal use of the structures and buildings. For soft soil foundation, there are many treatment modes in engineering, such as direct excavation, pile foundation treatment, prepressing consolidation drainage, grouting, dynamic compaction, etc. according to the characteristics of soft soil body, different methods have their respective applicability and limitation. Adopt reinforced concrete wall, can utilize concrete rigidity to add the structure and directly improve basic strength and bearing capacity, nevertheless can't provide drainage channel for deep soft soil, therefore be difficult to utilize the later stage intensity of soft soil consolidation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a structure combining a rigid reinforcing structure of a concrete lattice wall and a flexible reinforcing body of a discrete material pile aiming at the difficult problem of reinforcing a deep soft soil foundation, so as to meet the requirements of foundation strength, bearing capacity and deformation control. The above object of the present invention is achieved by the following technical solutions:
the utility model provides a deep soft soil foundation reinforcement processing structure of concrete lattice wall and discrete material stake combination is applied to and is handled at deep soft soil foundation reinforcement to satisfy the bearing capacity requirement under the high additional stress effect of upper portion heavy load structure or building, its characterized in that:
arranging a reinforced concrete lattice wall which is transversely and longitudinally orthogonal on the deep soft soil foundation;
arranging a gravel pile or a sand pile and other discrete material piles in the center of the concrete lattice wall lattice;
the concrete lattice wall and the bottom of the discrete material pile are located on a dense layer at the bottom of the soft foundation or weathered bedrock;
arranging a horizontal permeable cushion layer on the top of the concrete lattice wall and the discrete material pile; the horizontal permeable cushion layer and the granular piles form a horizontal and vertical foundation soft soil consolidation drainage channel together, soft foundation consolidation is accelerated, and meanwhile, the horizontal cushion layer can homogenize the settlement deformation of a soft foundation caused by the load of an upper building, so that the uneven settlement of the foundation is avoided.
Furthermore, the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are orthogonally arranged in a square shape, the size of the lattice is 2.5-3.5 m, the wall thickness is 0.8-1.2 m, the strength grade is not lower than C25, and the concrete reinforcement ratio is determined by structural stress calculation. Furthermore, the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are generally constructed in a full-length mode without structural joints, and the crossed joint positions of the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are transversely penetrated through the longitudinal steel bars, so that the joint positions are firmly connected.
Furthermore, the discrete material pile is arranged at the center of the sash of the concrete lattice wall, a immersed tube gravel pile or a sand pile is adopted, a vibroflotation pile is not suitable, and the diameter of the pile body is 0.8-1.0 m.
Furthermore, the horizontal permeable cushion layer generally adopts broken stones or pebbles, if the foundation has the reverse filtration protection requirement, artificial sand can be adopted, the gradation of the artificial sand is determined by the reverse filtration criterion, and the thickness of the cushion layer is generally 1.0 m-3.0 m.
Further, for the horizontal cushion layer with the thickness exceeding 1m, construction can be performed in two stages before and after the construction of the concrete lattice wall and the discrete material pile respectively from the perspective of convenient construction.
According to the utility model, the horizontal and longitudinal concrete lattice walls, the discrete material piles and the horizontal permeable cushion layer are arranged in the deep soft soil foundation, the soft soil foundation is reinforced by the rigid reinforcing structure and the flexible reinforcement together, meanwhile, the vertical and horizontal drainage channels are used for creating conditions for soft soil consolidation, the soft soil drainage consolidation is accelerated, and the later strength of the soft soil is fully utilized, so that the strength, the bearing capacity and the deformation modulus of the soft soil foundation are improved, and the requirements of an upper structure and a building on the foundation are met. In addition, the horizontal cushion layer has high modulus, can homogenize the additional stress of the foundation caused by the upper load, and is favorable for controlling the uneven deformation of the foundation.
Aiming at the condition of a deep soft soil foundation, the utility model provides a reinforcement treatment measure and a reinforcement treatment method which reasonably utilize a rigid reinforcement structure and a flexible reinforcement to jointly reinforce the soft soil foundation and simultaneously create conditions for accelerating drainage and consolidation of basic soft soil and improving the strength of the foundation, thereby realizing that the strength, the bearing capacity and the deformation modulus of the soft soil foundation meet the requirements of an upper structure and a building. Has important significance for the deep soft soil foundation treatment technology under complex conditions.
Drawings
Fig. 1 is a plan view of a deep soft soil foundation reinforcement treatment structure of a concrete lattice wall and discrete material pile combination of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings.
Referring to fig. 1 and 2, the deep soft soil foundation reinforcement treatment structure combining the concrete lattice wall and the discrete material piles provided by the utility model is applied to reinforcement treatment of the deep soft soil foundation, the depth of the soft soil foundation is generally not more than 40m, and the strength and the bearing capacity of the soft soil foundation cannot meet the requirements of an upper structure and a building; in fig. 1, reference numeral 100 is a deep soft soil, and reference numeral 200 is a soft soil compact layer or a weathered bedrock boundary; the deep soft soil foundation treatment structure mainly comprises the following parts:
the deep soft soil foundation treatment structure comprises a transverse reinforced concrete lattice wall 1, a longitudinal reinforced concrete lattice wall 2, discrete material piles 3, a top horizontal permeable cushion layer 4 and the like. The transverse concrete lattice wall 1 and the longitudinal concrete lattice wall 2 are arranged in a square orthogonal mode, the size of a lattice is 2.5 m-3.5 m, the wall thickness is 0.8 m-1.2 m, the strength grade is not lower than C25, the concrete reinforcement ratio is determined by structural stress calculation, the transverse wall and the longitudinal wall are generally constructed in the same length without structural joints, the transverse node position transversely penetrates through the longitudinal steel bar, the transverse steel bar penetrates through the longitudinal wall 2, the longitudinal steel bar penetrates through the transverse wall 1, and the node positions are firmly connected; the discrete material pile 3 is arranged at the center of the sash of the concrete lattice wall, and is carried out 28 days after the sash concrete construction, a immersed tube gravel pile or a sand pile is generally adopted, a vibroflotation pile is not suitable, and the diameter of a pile body is 0.8-1.0 m; constructing discrete material piles among the frames in sequence, and interpolating and encrypting; the top horizontal permeable cushion layer 4 generally adopts broken stones or pebbles, if the foundation has a reverse filtration protection requirement, artificial sand can be adopted, the gradation of the artificial sand is determined by a reverse filtration criterion, the thickness of the cushion layer is generally 1.0 m-3.0 m, for the horizontal cushion layer with the thickness exceeding 1m, from the angle of convenient construction, a layer of horizontal permeable cushion layer (named as a previous permeable cushion layer 41) is paved as a leveling bedding in advance before the construction of the concrete lattice wall and the discrete material pile, and the rest horizontal permeable cushion layer (named as a later permeable cushion layer 42) is paved to the designed thickness after the construction of foundation treatment is finished.
The deep soft soil foundation reinforcing treatment structure formed by combining the concrete lattice wall and the discrete material piles can be realized by adopting the following construction method:
1) firstly laying a gravel or gravel horizontal cushion layer (an early-stage permeable cushion layer 41) with the thickness of 0.5-1.5 m on the upper part of the soft soil foundation, and taking the gravel or gravel horizontal cushion layer as a construction site for leveling and paving, and also as a soft soil consolidation surface layer drainage channel in the construction period;
2) and after the previous permeable cushion layer 41 is paved, constructing the concrete lattice wall. The transverse and longitudinal reinforced concrete lattice walls 1 and 2 should be constructed alternately to facilitate the stability in the construction period;
3) after the concrete lattice wall is constructed, the discrete material pile 3 is constructed in the center of the lattice wall frame. The construction of the discrete material pile 3 is carried out 28 days after the construction of the sash concrete. Discrete material piles among the sashes are sequentially constructed and are internally inserted and encrypted;
4) after the construction of the lattice wall and the discrete material pile is completed, cleaning the polluted part of the first paved cushion layer on the upper surface layer, and carrying out layered rolling and filling on the residual permeable cushion layer to the designed thickness, wherein the thickness of crushed stones is not more than 80cm and the thickness of gravels is not more than 60 cm;
5) and after the horizontal permeable cushion layer is paved, constructing the upper structure and the building.
The above detailed description is provided to illustrate the present invention, but not to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.
Claims (4)
1. The utility model provides a deep soft soil foundation reinforcement processing structure of concrete lattice wall and discrete material stake combination which characterized in that:
arranging a reinforced concrete lattice wall which is transversely and longitudinally orthogonal in the deep soft soil foundation;
arranging a discrete material pile in the center of a frame of the concrete lattice wall;
the concrete lattice wall and the bottom of the discrete material pile are located on a dense layer at the bottom of the soft foundation or weathered bedrock;
arranging a horizontal permeable cushion layer on the top of the concrete lattice wall and the discrete material pile; the horizontal permeable cushion layer and the discrete piles form a horizontal and vertical foundation soft soil consolidation drainage channel together.
2. The deep soft soil foundation reinforcement structure of concrete lattice wall and discrete material pile combination of claim 1, characterized in that: the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are in square orthogonal arrangement, the size of the lattice is 2.5-3.5 m, the wall thickness is 0.8-1.2 m, and the strength grade is not lower than C25.
3. The deep soft soil foundation reinforcement structure of concrete lattice wall and discrete material pile combination of claim 1, characterized in that: the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are constructed in a through length mode, and structural joints are not divided: the crossed joint parts of the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are transversely penetrated through the longitudinal steel bars, so that the joint parts are firmly connected.
4. The deep soft soil foundation reinforcement structure of concrete lattice wall and discrete material pile combination of claim 1, characterized in that: if the basic soft soil has the reverse filtration protection requirement, the horizontal permeable cushion layer adopts artificial sand, and the gradation is determined by the reverse filtration criterion.
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| CN114045808A (en) * | 2021-10-26 | 2022-02-15 | 中国电建集团华东勘测设计研究院有限公司 | Deep soft soil foundation reinforcement treatment structure formed by combining concrete lattice walls and discrete material piles and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114045808A (en) * | 2021-10-26 | 2022-02-15 | 中国电建集团华东勘测设计研究院有限公司 | Deep soft soil foundation reinforcement treatment structure formed by combining concrete lattice walls and discrete material piles and construction method |
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