SMW construction method pipe jacking working well structure in water-rich area complex geology

Abstract

The utility model discloses an SMW construction method pipe-jacking working well structure in water-rich area complex geology, which structurally comprises a pipe-jacking working well wall, an inner supporting system and a bottom composite wall structure, the inner supporting system is formed by combining a reinforced concrete support and a steel pipe support, the pipe-jacking working well wall is an SMW construction method pile, a reinforced concrete top beam is arranged at the top of the SMW construction method pile, and the bottom composite wall structure is arranged at the bottom of the SMW construction method pile. The reinforced concrete support and steel pipe support combined inner support system comprises a first reinforced concrete angle brace, a steel pipe support, a steel enclosing purlin and a second reinforced concrete angle brace, and the bottom composite wall structure comprises a reinforced concrete back wall, a reinforced concrete lining wall and a reinforced concrete bottom plate. By optimizing the structural design of the pipe-jacking working well and combining the advantages of the SMW construction method, the safety and efficiency of pipe-jacking engineering construction in the complex geology of the water-rich area are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe jacking construction technology field, and specifically relates to a SMW method pipe jacking working well structure in water-rich area complex geology. BACKGROUND

[0002] With the acceleration of city modernization construction and the development of new technology, as a trenchless pipe laying construction technology for municipal construction, pipe jacking technology is widely used in the laying of various underground pipelines such as urban roads, railways, rivers, subways and sewage treatment plants, and plays an important role in city underground pipeline construction. The pipe jacking working well is a key part of pipe jacking construction, which not only bears various loads in the pipe jacking construction process, but also ensures the smooth advancement and reception of the pipe jacking. In water-rich area complex geology, the underground water level is high, and the geological conditions are complex, which may contain various types of soil layers, such as cohesive soil, silt, sand and sandy gravel soil. These soil layers may have problems such as sand flow and water gushing during construction, which brings great difficulties to construction. Secondly, under complex geological conditions, the stability and bearing capacity of the soil layer are poor, which may cause safety accidents during construction. Therefore, the structural design of the pipe jacking working well needs to fully consider factors such as underground water level and soil stability to ensure the safety and smooth progress of the construction.

[0003] The utility model of patent authorization announcement number CN211312767U discloses a SMW method well for sewage pipeline reconstruction or repair, which comprises a present sewage pipeline and a SMW method well arranged at a position where the present sewage pipeline needs to be repaired or reconstructed and connected with the present sewage pipeline; the SMW method well comprises a foundation pit and a maintenance structure arranged outside the foundation pit; the cross section of the foundation pit is in the shape of a regular rectangle; the maintenance structure comprises a plurality of longitudinally arranged cement mixing piles arranged along the foundation pit, and adjacent cement mixing piles are overlapped and lapped; a stiff material is inserted into the middle part of the cement mixing pile. The utility model adopts the SMW method well and uses trenchless technology, which can well avoid the interference of the sewage pipeline on the normal life, traffic, environment, etc. of the surrounding residents, will not damage the surrounding vegetation, buildings, etc., and will not affect the normal order of the surrounding area.

[0004] However, under the construction environment of water-rich area complex geology, the SMW method well disclosed in the above patent still has some limitations, for example, the excavation depth of the working well, the complex geological conditions, the limited construction space and other factors may cause difficulties in the construction of the enclosure structure. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a SMW method pipe jacking working well structure in water-rich area complex geology, which optimizes the structural design of the pipe jacking working well, combines the advantages of the SMW method, and improves the safety and efficiency of pipe jacking engineering construction in water-rich area complex geology.

[0006] The utility model solves technical scheme that it adopts to its technical problem: a kind of SMW method top pipe working well structure in complex geology of water-rich area, its structure includes top pipe working well wall, steel pipe support combination's inner support system of steel reinforced concrete support and steel pipe support combination, bottom composite wall structure, the top pipe working well wall is SMW method pile, SMW method pile top is provided with steel reinforced concrete crown beam, steel reinforced concrete support and steel pipe support combination's inner support system includes first steel reinforced concrete angle brace, steel pipe support and steel encloses purlin, second steel reinforced concrete angle brace, the bottom composite wall structure includes steel reinforced concrete back wall, steel reinforced concrete lining wall, steel reinforced concrete bottom plate.

[0007] Further, the first steel reinforced concrete angle brace is rigidly connected with the steel reinforced concrete crown beam, and is integrally and continuously poured.

[0008] Further, the SMW method pile is provided with an H-shaped steel, and the steel reinforced concrete crown beam is provided with pearl wool isolation between the H-shaped steel in the SMW method pile.

[0009] Further, the steel pipe support is connected with the side wall of the SMW method pile through the steel encloses purlin, the steel encloses purlin adopts double-spliced steel encloses purlin, and the steel encloses purlin is closely combined with the inner side of the SMW method pile.

[0010] Further, the steel reinforced concrete back wall, the steel reinforced concrete lining wall, the steel reinforced concrete bottom plate and the second steel reinforced concrete angle brace are integrally poured to form a steel reinforced concrete hollow box.

[0011] The utility model has the advantages of:

[0012] The utility model improves construction efficiency: the SMW method pile enclosure structure is used, the construction period is short, the no-support area in the center of the top pipe working well formed by the setting of angle brace provides convenience for hoisting operation, greatly improves construction efficiency, and saves construction period.

[0013] The utility model enhances waterproof performance: the SMW method pile is constructed by sleeve connection one hole method, forms a continuous and complete underground wall without joint, effectively improves the waterproof performance of the enclosure structure.

[0014] The utility model improves bearing capacity and stability: according to the excavation depth and geological conditions of the working well, the steel reinforced concrete support and steel pipe support combination's inner support system auxiliary support structure is set to improve the bearing capacity of the enclosure structure and enhance the stability of the working well.

[0015] The utility model guarantees construction safety: provides stable support, prevents collapse, reduces deformation and the like, and ensures the safety and smooth progress of the top pipe construction. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1It is a structure section schematic view of the utility model.

[0017] Figure 2 It is a structure plane schematic view of the utility model.

[0018] In the drawing,

[0019] 1, SMW method pile, 2, reinforced concrete crown beam, 3, first reinforced concrete angle brace, 4, steel pipe support, 5, steel encloses purlin, 6, reinforced concrete back wall, 7, reinforced concrete lining wall, 8, reinforced concrete bottom plate, 9, second reinforced concrete angle brace. CONCRETE ANGLE BRACE

[0020] Refer to the following detailed description of the utility model of a complex geological structure in the water-rich area SMW method pipe jacking working well structure in the attached drawings of the specification.

[0021] Please see Figure 1 、 Figure 2 The utility model provides a technical scheme: a complex geological structure in the water-rich area SMW method pipe jacking working well structure, including the inner support system of pipe jacking working well well wall, reinforced concrete support and steel pipe support combination, bottom composite wall structure, the pipe jacking working well well wall is SMW method pile 1, and the top of SMW method pile 1 is provided with reinforced concrete crown beam 2, the inner support system of reinforced concrete support and steel pipe support combination includes first reinforced concrete angle brace 3, steel pipe support 4 and steel encloses purlin 5, second reinforced concrete angle brace 9, and the bottom composite wall structure includes reinforced concrete back wall 6, reinforced concrete lining wall 7 and reinforced concrete bottom plate 8.The first reinforced concrete angle brace is rigidly connected with the reinforced concrete crown beam, and is integrally continuously poured.The SMW method pile enclosure structure is adopted, the construction period is short, the angle brace is set to form the large area no support area in the centre of pipe jacking working well, provides the convenience for hoisting operation, greatly improves construction efficiency, and saves construction period.

[0022] The size of SMW method pile 1 is Full insertion H700×300×13×24 section steel, the surface of H section steel is uniformly brushed with environmental protection type friction reducer, and cement soil mixing pile adopts sleeve connection one hole method.

[0023] H section steel is arranged in the SMW method pile 1, the reinforced concrete crown beam 2 is rigidly connected with the first reinforced concrete angle brace 3, and is integrally continuously poured, the size of reinforced concrete crown beam 2 is 1150×800mm, and the size of reinforced concrete angle brace 3 is 600×600mm.The 3mm thick pearl wool is used between reinforced concrete crown beam and the H section steel of SMW method pile to carry out isolation treatment.

[0024] The steel pipe support is connected with the SMW method pile side wall through a steel enclosing purlin, the steel enclosing purlin 5 adopts a double-spliced steel enclosing purlin, and the steel enclosing purlin 5 is closely combined with the inner side of the SMW method pile 1. The steel pipe support 4 is of a type of The steel pipe support 4 is of a type of

[0025] The steel reinforced concrete back wall 6 has a thickness of 800 mm, the steel reinforced concrete lining wall 7 has a thickness of 500 mm, the steel reinforced concrete bottom plate 8 has a thickness of 800 mm, and the second steel reinforced concrete angle support 9 has a size of 600*600 mm. The steel reinforced concrete back wall 6 and the steel reinforced concrete lining wall 7 have a height of a reserved hole diameter D+1 m. The steel reinforced concrete back wall 6, the steel reinforced concrete lining wall 7, the steel reinforced concrete bottom plate 8 and the second steel reinforced concrete angle support 9 are integrally poured to form a steel reinforced concrete hollow box, which provides sufficient reaction force when the pipe is jacked, protects the hole, provides stable support at the bottom of the pipe jacking working well, and reduces the deformation of the enclosure structure.

[0026] The above description is only used to illustrate some principles of the utility model, and the description is not intended to limit the utility model to the specific structure and application range shown, so all possible corresponding modifications and equivalents belong to the patent range applied by the utility model.

[0027] In addition to the technical features described in the description, the remaining technical features are known to those skilled in the art.

Claims

1. A structure of a jacking well for a SMW method in a water-rich area with complex geology, characterized in that, The utility model provides a kind of inner support system comprising the well wall of pipe jacking working well, reinforced concrete support and steel pipe support combination, bottom composite wall structure, the well wall of pipe jacking working well is SMW method pile, SMW method pile top is provided with reinforced concrete crown beam, the inner support system comprising first reinforced concrete angle support, steel pipe support and steel encloses purlin, second reinforced concrete angle support of reinforced concrete support and steel pipe support combination, the bottom composite wall structure comprises reinforced concrete back wall, reinforced concrete lining wall, reinforced concrete bottom plate.

2. The structure of the working well of pipe jacking in the SMW method in the complex geology of water-rich area according to claim 1, characterized in that, The first reinforced concrete angle support is rigidly connected with the reinforced concrete crown beam, and is integrally and continuously poured.

3. The structure of the working well for pipe jacking in the SMW method in the complex geology of water-rich area according to claim 1 or 2, characterized in that, The SMW method pile is provided with an H-shaped steel.

4. The structure of the working well of pipe jacking in the SMW method in the complex geology of water-rich area according to claim 1, characterized in that, The steel pipe support is connected with the side wall of the SMW method pile through the steel encloses purlin, the steel encloses purlin adopts double-spliced steel encloses purlin, and the steel encloses purlin is closely combined with the inner side of the SMW method pile.

5. The structure of the working well of pipe jacking in the SMW method in the complex geology of water-rich area according to claim 1, characterized in that, The reinforced concrete back wall, the reinforced concrete lining wall, the reinforced concrete bottom plate and the second reinforced concrete angle support are integrally poured to form a reinforced concrete hollow box.

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