CN-117230825-B - Construction method for reverse construction engineering subsurface earth structure staggered-layer running water

CN117230825BCN 117230825 BCN117230825 BCN 117230825BCN-117230825-B

Abstract

The application relates to a construction method of reverse engineering subsurface earth structure staggered-layer running water, which comprises the following steps of S1, constructing a surrounding underground continuous wall and constructing a pile foundation in a foundation pit; the method comprises the steps of S2, dividing a region to be constructed in a foundation pit into a region A and a region B, firstly excavating the region A in one layer, S3, constructing a first layer of structural beam plate of the region A after a retaining wall structure is supported on the underground layer of the region A by the structural work, simultaneously excavating the region B in one layer by the structural work, S4, constructing the first layer of structural beam plate of the region B by the structural work, simultaneously excavating the underground layer of the region A by the structural work, S5, constructing a second layer of structural beam plate of the region A after supporting the soil of the region B by the structural work by supporting a retaining wall structure on the underground layer of the region A, and simultaneously excavating the underground layer of the region B by the soil work.

Inventors

WANG YAO
TU MINJIE
WU JINGHUA
JIN GUANNAN
DAI RUIPING
YANG CHUNSHENG

Assignees

中建海峡建设发展有限公司

Dates

Publication Date: 20260505
Application Date: 20231027

Claims (8)

1. A construction method of reverse engineering subsurface earth structure staggered layer flowing water is characterized by comprising the following steps: S1, foundation pit supporting and foundation reinforcement construction, namely constructing an enclosing underground continuous wall (10) and constructing a foundation pile foundation (20) in a foundation pit; s2, dividing a region to be constructed in a foundation pit into a region A and a region B, firstly excavating the region A by earthwork working seeds, and excavating to the ground elevation of a layer of underground ground; S3, constructing a first-layer structural beam plate (30) of the area A after the retaining wall structure (1) is supported on the underground one layer of the area A by the construction operation type, and excavating the area B to the ground elevation of the underground one layer by the earthwork operation type; s4, constructing a first-layer structural beam plate (30) of the area B by using the construction work seeds, and excavating the area A until the elevation of the two layers of underground ground is reached after the construction work seeds reach structural design strength in the first-layer structural beam plate (30) of the area A; S5, constructing a first layer of underground structure beam plate (40) of the area A after the retaining wall structure (1) is supported on the second layer of underground structure of the area A by the construction work seeds to support soil of the area B, and excavating the area B until the elevation of the ground of the second layer of underground structure is reached after the first layer of underground structure beam plate (30) of the area B reaches structural design strength by the earthwork seeds; S6, constructing a layer of underground structural beam plates (40) in the area B by using the construction work seeds, and excavating the area A until the elevation of the ground of the three layers of underground surfaces is reached after the construction work seeds reach structural design strength in the layer of underground structural beam plates (40) in the area A; S7, constructing an underground two-layer structure beam plate (50) of the area A after the retaining wall structure (1) is supported on the underground three layers of the area A by the construction operation work species, and excavating the area B and excavating to the ground elevation of the underground three layers after the underground one-layer structure beam plate (40) of the area B reaches the structural design strength by the earthwork operation work species; S8, constructing a structural baseplate (60) of the area A and a beam slab (50) of the area B by structural operation, and constructing the structural baseplate (60) of the area B after the beam slab (50) of the area B reaches structural design strength; The retaining wall structure (1) comprises a plurality of retaining plates (11) which are detachably connected to the ground, retaining plates (12) which are abutted to soil in the area B and diagonal bracing arms (13) which are arranged between the retaining plates (11) and the retaining plates (12), back ribs (14) are fixedly connected between the retaining plates (12), reinforcing structures (2) are additionally arranged between the back ribs (14) and pile foundations (20), air injection pipes (3) which are inserted into the soil in the area B are arranged on the retaining plates (12) in a penetrating mode, air outlet holes (31) which are communicated with an inner cavity are formed in the peripheral wall of the air injection pipes (3), and before the soil in the area B is excavated, air injection operation is carried out on the air injection pipes (3) through an air pump, so that the soil above the air injection pipes (3) becomes soft.
2. The method for constructing the staggered floor flowing water of the underground earthwork structure of the reverse construction engineering as set forth in claim 1, wherein the method further comprises the step S9 of constructing the post-cast strip structure (70) between the first-layer structure beam plates (30) of the area A and the area B, between the underground first-layer structure beam plates (40) of the area A and the area B, between the underground second-layer structure beam plates (50) of the area A and the area B and between the structure bottom plates (60) of the area A and the area B.
3. The method for constructing staggered-layer flowing water of a reverse engineering subsurface structure according to claim 1, wherein the reinforcing structure (2) comprises a connecting arm (21) arranged on the back edge (14) and a pair of clamping pieces (22) movably arranged at one end, far away from the back edge (14), of the connecting arm (21) so as to clamp and fix the pile foundation (20).
4. The construction method of reverse engineering subsurface structure staggered-layer running water according to claim 3, wherein the back ridge (14) is connected with a sliding seat (15) in a sliding manner, and the connecting arm (21) is arranged on the sliding seat (15).
5. The construction method of reverse engineering subsurface structure staggered-layer flowing water according to claim 3, wherein the connecting arm (21) comprises a connecting sleeve (211) arranged on the back edge (14) and a connecting rod (212) connected to the connecting sleeve (211) in a sliding manner towards the direction close to or far away from the back edge (14), the clamping piece (22) is arranged at one end of the connecting rod (212) far away from the back edge (14), and the connecting sleeve (211) is provided with a driving piece for driving the connecting rod (212) to slide.
6. The construction method of reverse engineering subsurface earth structure staggered-layer flowing water is characterized in that the air injection pipe (3) is detachably connected with a plurality of unit jacking pipes (4), the inner cavities of the unit jacking pipes (4) are communicated with the inner cavities of the air injection pipe (3), the adjacent two unit jacking pipes (4) are detachably connected, the inner cavities of the unit jacking pipes (4) are mutually communicated, the air injection pipe (3) is gradually jacked and inserted into soil in a region B along the horizontal direction by a jacking device (6) through jacking, air injection is carried out on the unit jacking pipes (4) through an air pump, air overflows from an air outlet (31) of the air injection pipe (3), and in the soil body process of the region B, one side close to a baffle wall plate (12) is gradually excavated.
7. The construction method of reverse engineering subsurface structure staggered-layer flowing water according to claim 6, wherein an inserting ring groove (32) is formed in the inner wall of one end of the air injection pipe (3), an inserting ring sleeve (41) inserted into the inserting ring groove (32) is fixedly connected to one end of the unit jacking pipe (4) in a coaxial mode, a limit groove (33) is formed in the inner wall of the inserting ring groove (32), a sliding hole (42) is formed in the inserting ring sleeve (41) in the radial direction, a limiting block (43) which is connected to the sliding hole (42) in a sliding mode and is inserted into the limit groove (33) is arranged on the inserting ring sleeve (41), and a control assembly (5) for controlling the sliding of the limiting block (43) is arranged on the unit jacking pipe (4).
8. The method for constructing the staggered floor flowing water of the reverse engineering subsurface structure according to claim 7, wherein the control assembly (5) comprises a transmission rod (51) which is arranged in the unit jacking pipe (4) and slides along the axial direction, a hinging rod (52) one end of which is hinged to the transmission rod (51) and the other end of which is hinged to the limiting block (43), and a control piece for driving the transmission rod (51) to slide.

Description

Construction method for reverse construction engineering subsurface earth structure staggered-layer running water Technical Field The application relates to the technical field of building construction, in particular to a construction method for reverse construction engineering underground earth structure staggered-layer flowing water. Background The reverse construction method is an ultra-conventional construction method and is generally adopted under special conditions of deep foundation, complex geology, high groundwater level and the like. The underground continuous wall or other supporting structures are firstly constructed along the axis or the periphery of the basement of the building, and meanwhile, middle supporting piles and columns are poured or driven at relevant positions in the building to serve as supports for bearing the dead weight of the upper structure and construction load before the bottom plate is sealed during construction. Then excavating earthwork to the elevation of the bottom surface of the basement of the first layer, completing the beam slab floor structure of the layer, taking the beam slab floor structure as a support with great rigidity of the underground continuous wall, and then excavating the earthwork downwards layer by layer and pouring the underground structures of each layer until the bottom plate is sealed. The full reverse construction underground traditional construction process is that one layer of earthwork is excavated, one layer of beam slab structure is constructed, after the whole layer of concrete of the beam slab structure reaches the design strength, the next layer of earthwork excavation operation can be carried out, and the like. In view of the above-mentioned related art, the inventors have found that there is a problem in that a large technological break is caused between construction work and earth work, and thus different work is stopped, and the purpose of line work is not achieved, and thus further improvement is required. Disclosure of Invention In order to reduce the possibility of operation stagnation between a structural operation type and an earthwork operation type, the application provides a construction method for staggered-layer flow water of an earthwork structure under a reverse construction engineering. The application provides a construction method of reverse engineering subsurface earth structure staggered-layer flowing water, which adopts the following technical scheme: A construction method of reverse engineering subsurface earth structure staggered layer flowing water comprises the following steps: S1, foundation pit supporting and foundation reinforcement construction, construction of enclosing underground continuous walls and construction of pile foundations in a foundation pit; s2, dividing a region to be constructed in a foundation pit into a region A and a region B, firstly excavating the region A by earthwork working seeds, and excavating to the ground elevation of a layer of underground ground; S3, constructing a first-layer structural beam plate of the area A after the retaining wall structure is supported on the underground layer of the area A by the construction operation type to support the soil body of the area B; S4, constructing a first-layer structural beam slab in the area B by using the construction work seeds, and excavating the area A until the elevation of the two layers of underground ground is reached after the construction work seeds reach structural design strength in the first-layer structural beam slab in the area A; s5, constructing a first layer of structure beam plate in the area A after the construction work species supports a retaining wall structure on the second layer of the underground in the area A to support soil in the area B, and excavating the area B until the first layer of structure beam plate in the area B reaches structural design strength; s6, constructing a layer of underground structural beam plate in the area B by using the construction work, and excavating the area A until the underground three layers of ground elevation after the construction work in the area A reaches the structural design strength; S7, constructing an underground two-layer structure beam plate of the area A after the retaining wall structure is supported on the underground three layers of the area A by the construction work seeds to support soil bodies of the area B; S8, constructing a structural baseplate in the area A and a beam slab in the area B by structural operation, and constructing the structural baseplate in the area B after the beam slab in the area B reaches structural design strength. By adopting the technical scheme, the areas A and B are alternately excavated and staggered-layer constructed until the construction of the bottommost structural beam slab and the structural bottom plate is completed, the time for waiting for the strength to meet the requirement after the concrete in one area is poured is