CN218861467U

CN218861467U - River bottom truss type internal-bracing prefabricated pile wall river channel supporting structure

Info

Publication number: CN218861467U
Application number: CN202223056193.1U
Authority: CN
Inventors: 韦永超; 颜春; 谢明志; 张鹏; 贺剑辉; 欧冬; 唐新国; 魏密
Original assignee: Guangxi Jiaoke Group Co Ltd
Current assignee: Guangxi Jiaoke Group Co Ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-04-14
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses a river channel supporting structure of a river bottom truss type internal support prefabricated pile wall, which consists of prefabricated pile walls at two sides, a truss type internal support and a paving gabion; the truss type inner support is a space truss structure, two sides of the space truss structure are tightly attached to and support prefabricated pile walls on two sides, a paving gabion is arranged between the truss type inner supports, and the upper surface of the paving gabion is flush with the upper surface of the truss type inner support. Accordingly, the inventor also establishes a corresponding construction method. The utility model discloses supporting construction consumptive material is few, can be under construction fast, can realize that riverway water and peripheral geology groundwater supply each other and river course section form change along with the water level, and the limited small-size river course of urban land deep soft soil foundation deep river course of specially adapted city land.

Description

River bottom truss type internal-bracing prefabricated pile wall river channel supporting structure

Technical Field

The utility model belongs to the technical field of geotechnical engineering struts, especially, relate to a river bottom truss-like internal stay precast pile wall river course supporting construction.

Background

Along with the continuous expansion and development of cities, the problem of urban inland river water environment pollution is increasingly prominent. The urban river basin environment is an important part of urban appearance environment, and the environmental management problem is increasingly important. Due to the crowded urban population, the structures built on the two sides of the urban inland river channel are densely distributed, so that the transformation land and the transformation period of the urban inland river channel are very short. The traditional river channel bank protection structure mainly comprises a gravity type retaining wall bank protection structure, a cantilever type retaining wall bank protection structure, a buttress type retaining wall bank protection structure, a gabion retaining wall bank protection structure, a cantilever type cast-in-situ pile sheet type retaining wall bank protection structure, a cantilever type precast pile bank protection structure and a cantilever type steel sheet pile bank protection structure. However, gravity retaining wall revetment, cantilever retaining wall revetment structure, buttress retaining wall revetment structure and gabion retaining wall revetment have great self-weight, high foundation bearing capacity requirement, large excavation is needed during construction, and the gravity retaining wall revetment, cantilever retaining wall revetment structure, buttress retaining wall revetment structure and gabion retaining wall revetment structure are difficult to be suitable for urban river revetment support with deep soft soil foundation and limited land use and short construction period; the bored pile sheet type retaining wall is high in rigidity, small in occupied area, suitable for supporting deep river channels and flexible in construction, is usually used for shore protection of urban river channels with limited land utilization, but slurry retaining walls are required for construction of deep and soft foundation river banks, construction efficiency is low, construction period is long, and normal traveling and life of residents on two banks of the urban river channels are influenced; cantilever type precast pile and cantilever type steel sheet pile can be constructed because of being fast and be widely used in river course shore protection structure, but precast pile and steel sheet pile component bending stiffness and shear strength are little, generally suitable for and strut the depth limited, difficult to be suitable for and strut the river course shore protection that the river course depth exceeds 5m, especially in soft soil foundation river course shore protection, and the steel sheet pile is easy to rust, the durability is poor, precast pile length is short, prop the stake and inlay the solid length not enough, therefore has restricted their application.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a river bed truss-like internal stay precast pile wall river course supporting construction that the structure consumptive material is few, the construction is quick, it is applicable to the small-size river course shore protection of deep soft base, and can realize that river course water and peripheral geology groundwater supply each other and river course section form change along with the water level.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a river channel supporting structure with a river bottom truss type inner support prefabricated pile wall mainly comprises prefabricated pile walls on two sides, a truss type inner support and a paving gabion; the truss type internal bracing is a space truss structure, two sides of the space truss structure are tightly attached to and support prefabricated pile walls on two sides, a paving gabion is arranged between the truss type internal bracing, and the upper surface of the paving gabion is flush with the upper surface of the truss type internal bracing.

The prefabricated pile wall is a row of support point range post-cast reinforced concrete core-filling reinforcement and adopts cast-in-situ reinforced concrete crown beams to connect and form an integral close-packed prefabricated prestressed concrete hollow square pile.

The space truss structure consists of a diagonal brace, an inclined brace, an upper waist beam, a lower waist beam, a connecting beam and a supporting column; the diagonal brace, the inclined brace and the support column form a symmetrical triangular support on the same vertical face, and the symmetrical triangular support is respectively provided with a lower waist beam, an upper waist beam and a connecting beam at the intersection point of the diagonal brace and the support column, the intersection point of the inclined brace and the support column and the intersection point of the inclined brace and the diagonal brace and is connected with the lower waist beam and the upper waist beam.

The connecting beam is a wide flat beam.

The distance between the symmetrical triangular support frames is 3m-15m.

The paving gabion is formed by filling hard rock blocks into the gabion for paving.

Aiming at the problems that the precast piles are applied to deep and soft foundation small riverway revetments, the bending resistance, the shearing resistance and the bearing capacity are low, the length is short, the embedding depth is insufficient and the like, the river channel supporting structure of the river bottom truss type internal support precast pile wall is designed by the inventor, and the river channel supporting structure consists of precast pile walls on two sides, truss type internal supports and paving gabions; the truss type internal bracing is a space truss structure, two sides of the space truss structure are tightly attached to and support prefabricated pile walls on two sides, a paving gabion is arranged between the truss type internal bracing, and the upper surface of the paving gabion is flush with the upper surface of the truss type internal bracing. Accordingly, the inventor also establishes a corresponding construction method.

Compared with the prior art, the utility model discloses an outstanding advantage specifically lies in:

1. the utility model discloses supporting construction adopts the truss-like internal stay on the elastic foundation, forms the space supporting construction that bending stiffness is great, anti shear capacity is stronger with the prefabricated pile wall in both sides, can effectively reduce precast pile embedded segment stake length to can stably strut the great soil and water pressure of deep soft basic high and deep bank, the service condition and the scope of extension precast pile.

2. The utility model discloses supporting construction adopts prefabricated pile wall as supporting construction side direction supporting component, the construction takes up an area of for a short time, supporting construction overall rigidity is big, can be used to the limited urban area of city land and change the way quick construction of river course or river course renovation river reach shore protection, the long problem of bored concrete pile shore protection structure construction period has been overcome, traditional gravity type retaining wall has been overcome, the cantilever type retaining wall, counterfort formula retaining wall, the problem of digging greatly and higher ground bearing capacity requirement problem of gabion retaining wall structure, it is little to have solved cantilever type prefabricated pile wall retaining wall structure and cantilever type steel sheet pile retaining wall structural rigidity, can't adapt to the deep river bank problem of strutting.

3. When the truss type inner support is submerged by the river water level, the cross section of the river is a rectangular cross section similar to the traditional river bank protection structure; when the water level of the river channel is lower than the truss type inner support upper waist beam, the cross section of the river channel is a polygonal cross section, the landscape effect of the cross section of the river channel changes along with the change of the water level, and the landscape effect of the urban river channel is enriched.

Drawings

Fig. 1 is the plane layout structure schematic diagram of the river channel supporting structure of the river bottom truss type internal bracing prefabricated pile wall of the utility model.

Fig. 2 is the cross-section schematic diagram of the river bottom truss type inner support precast pile wall river channel supporting structure bracing department of the utility model.

Fig. 3 is the cross-section schematic diagram of the river bottom truss type inner support precast pile wall river channel supporting structure bracing department in the dry season.

Fig. 4 is the cross-section schematic diagram of the river bottom truss type internal bracing prefabricated pile wall river course supporting structure stone-laying gabion department of the utility model.

Fig. 5 is the section schematic diagram of the temporary support during the construction of the river bottom truss type internal bracing prefabricated pile wall river channel supporting structure of the utility model.

In the figure: 1, prefabricating a pile wall; 2, filling concrete into a core; 3, a crown beam; 4 pairs of supports; 5, a lower waist rail; 6 connecting the beam; 7, supporting columns; 8, an inclined strut; 9, mounting a waist rail; 10, filling soil; 11, paving a gabion; 12 temporary steel support, 13 ground, 14 water level and 15 river bottom.

Detailed Description

A basic structure

As shown in fig. 1 to 5, the river channel supporting structure of the river bottom truss type inner support prefabricated pile wall mainly comprises prefabricated pile walls 1 at two sides, a truss type inner support and a paving gabion 11; the truss type internal bracing is a space truss structure, two sides of the space truss structure are tightly attached to and support the prefabricated pile walls at two sides of the left side and the right side of a river channel, a paving gabion is arranged between the truss type internal bracing, and the upper surface of the paving gabion is flush with the upper surface of the truss type internal bracing. Wherein the content of the first and second substances,

the precast pile wall is a row of fulcrum range post-cast reinforced concrete core 2 to strengthen the bending resistance and shearing resistance, and adopts cast-in-situ reinforced concrete crown beams 3 to connect to form an integral close-packed precast prestressed concrete hollow square pile.

The space truss structure consists of a diagonal brace 4, an inclined brace 8, an upper waist beam 9, a lower waist beam 5, a connecting beam 6 and a support column 7; each part is formed by fixedly connecting cast-in-place reinforced concrete members and is arranged at the bottom of the riverbed, a pair of supports, an inclined support and a support column form a symmetrical triangular support on the same vertical surface, the space between the symmetrical triangular supports is 3m-15m, and the triangular supports are also used for separating and fixing a river bottom paving gabion; the symmetrical triangular supports are respectively provided with a lower waist beam, an upper waist beam and a connecting beam at the intersection point of the diagonal brace and the support column, the intersection point of the diagonal brace and connected with the lower waist beam, the upper waist beam and the connecting beam to form a space truss structure on the elastic foundation to support the prefabricated pile walls on two sides. The connecting beam is a wide flat beam and is embedded at the bottom of the riverbed and covered by a stone cage paved at the bottom of the riverbed.

The paving gabion is formed by filling hard rock blocks into the gabion and paving the gabion on at the bottom of a river, and is flush with the truss type inner support to form a river bed surface so as to protect the river bed and the truss type inner support from being washed and damaged by water flow.

Second, construction method

1) Construction preparation: and calculating the size specification parameters of each component material required by the river bottom truss type internal support precast pile wall river channel supporting structure according to the planned and designed river channel, geological conditions on two sides and the surrounding environment, and drawing a design drawing. And leveling the river bank site to the designed elevation of the river bank ground according to the design drawing.

2) And (3) construction of the prefabricated pile wall: according to design drawings and on-site measurement, pile positions of prefabricated pile walls on two sides of a lofting river channel are measured, prefabricated prestressed concrete hollow square piles are vertically sunk into a stratum to form a densely-arranged prefabricated pile wall, the cavity above the supporting point of the prestressed concrete hollow square pile is filled with cast-in-place reinforced concrete, and the densely-arranged prestressed concrete hollow piles are connected by cast-in-place reinforced concrete crown beams for grooving construction to form the integral prefabricated pile wall.

3) Excavating a shallow foundation pit and erecting and constructing a temporary steel support: and excavating the shallow foundation pit to the elevation of the bottom of the crown beam, and erecting a temporary steel support 12 on the crown beam.

4) Excavating a river channel foundation pit and constructing a truss type internal support: excavating earthwork in the foundation pit to reach the designed elevation of a riverbed in a layered and segmented manner, excavating grooves to construct a diagonal brace, a connecting beam and a lower waist beam of a truss type inner brace, then respectively building a construction support column, an upper waist beam and an inclined brace, and maintaining to reach the designed strength.

5) Paving a gabion for construction: after the truss type inner supports reach the design strength, gabion gabions are laid among the triangular inner supports of the truss type inner supports at the river bottom to form the river bed surface.

6) Dismantling the temporary steel support: and (4) dismantling the temporary steel supports to form a river channel supporting structure of the river bottom truss type internal support prefabricated pile wall for combining the prefabricated pile walls on the two sides of the river channel with the truss type internal support and paving the gabion protecting bottom.

Claims

1. A river bottom truss type inner support prefabricated pile wall river channel supporting structure is characterized by mainly comprising prefabricated pile walls on two sides, a truss type inner support and a paving gabion; the truss type inner support is a space truss structure, two sides of the space truss structure are tightly attached to and support prefabricated pile walls on two sides, a paving gabion is arranged between the truss type inner supports, and the upper surface of the paving gabion is flush with the upper surface of the truss type inner support.

2. The river bottom truss type internal bracing prefabricated pile wall river channel supporting structure according to claim 1, characterized in that: the precast pile wall is a densely-arranged precast prestressed concrete hollow square pile which is reinforced by post-cast reinforced concrete core filling in a row of supporting points and is connected by cast-in-situ reinforced concrete crown beams to form a whole.

3. The river bottom truss type internal bracing prefabricated pile wall river channel supporting structure according to claim 1, characterized in that: the space truss structure consists of a diagonal brace, an inclined brace, an upper waist beam, a lower waist beam, a connecting beam and a support column; the diagonal brace, the inclined brace and the support column form a symmetrical triangular support at the same vertical face, and the symmetrical triangular support is respectively provided with a lower waist beam, an upper waist beam and a connecting beam at the intersection point of the diagonal brace and the support column, the intersection point of the inclined brace and the support column and the intersection point of the inclined brace and the diagonal brace and connected with each other.

4. The river bottom truss type internal bracing prefabricated pile wall river channel supporting structure according to claim 3, characterized in that: the connecting beam is a wide flat beam.

5. The river bottom truss type internal bracing prefabricated pile wall river channel supporting structure according to claim 3, characterized in that: the distance between the symmetrical triangular support frames is 3-15 m.

6. The river bottom truss type internal bracing prefabricated pile wall river channel supporting structure according to claim 1, characterized in that: the paving gabion is formed by filling hard rock blocks into the gabion for paving.