Foundation pit fat groove rapid backfilling and support changing structure

Abstract

The utility model discloses a quick backfilling and support changing structure for a foundation pit fertilizer groove, which is characterized in that the fertilizer groove is backfilled by using flow-state solidified soil, so that the one-time direct backfilling of the fertilizer groove can be realized, the traditional layered tamping construction process is changed, the investment of earthwork tamping equipment on a construction site is reduced, and the construction quality of backfilled soil and a main body structure is ensured; meanwhile, the field construction efficiency is improved; on the surface of the flow-state solidified soil, the support changing plate strip is formed through one-time pouring of plain concrete, a traditional construction mode is changed, manpower and construction period cost are saved, and meanwhile construction safety is effectively guaranteed when support changing plate strip construction is conducted in a narrow area; the settlement pipe and the layered settlement magnetic ring are buried before the fertile groove is backfilled, the earthwork settlement amount corresponding to the elevation of the layered settlement magnetic ring can be measured in real time through movement of the sensor in the settlement pipe, the device is used for earthwork settlement amount monitoring and early warning, uneven settlement of a building after the fertile groove is backfilled is effectively prevented, and potential quality hazards of the building are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of foundation pit fat groove backfilling and support replacement, in particular to a kind of quick backfilling and support replacement structure of foundation pit fat groove. BACKGROUND

[0002] In the urban construction of soft soil area, due to the soft and complex soil layer, the soil layer is basically saturated water flow plastic or soft plastic clay, with low shear strength, low permeability, high water content, high sensitivity, high compressibility, and obvious rheological properties. Deep foundation pit excavation and support not only ensure the safety and stability of the foundation pit itself, but also effectively control the deformation of the foundation pit to protect the buildings, underground pipelines, traffic arteries and other municipal facilities close to the deep foundation pit. Reinforced concrete inner support, as a safe and reliable support form, is widely used in deep foundation pit construction in soft soil area.

[0003] The construction process of the foundation pit with conventional reinforced concrete support support form is as follows: support pile and crown beam construction is completed → soil excavation to the bottom elevation of reinforced concrete inner support, inner support construction is completed → soil excavation to the bottom of the foundation pit, cushion construction is completed → bottom plate construction is completed → force transmission belt construction → underground second floor outer wall, floor, support replacement plate belt construction → fat groove is backfilled and compacted to the top plate elevation of underground second floor in layers → reinforced concrete inner support is removed → underground first floor outer wall and floor construction.

[0004] From the above process, it can be seen that for the deep foundation pit with reinforced concrete inner support support form, two prerequisites are needed for the main structure construction and removal of reinforced concrete inner support. One is to construct force transmission belt between bottom plate and support pile, and the other is to construct support replacement plate belt between structure floor and support pile and backfill fat groove below the elevation. However, there are three safety and quality risks in the second prerequisite:

[0005] Firstly, in the construction of underground second floor support replacement plate belt, it is necessary to erect formwork in fat groove in advance, which not only requires a large number of personnel and time cost, but also has safety risks in narrow area construction.

[0006] Secondly, the steel bars in support replacement plate belt need to be anchored and overlapped with structure outer wall steel bars, which may cause quality problems for waterproof construction of main structure outer wall in later period.

[0007] Thirdly, in the process of fat groove backfilling and compacting in layers, it is difficult to backfill and compact densely in fat groove with narrow space and no mechanical development, and the quality of backfilled soil cannot be guaranteed in rainy season, which may easily cause ground subsidence and affect the construction quality of main structure. INVENTION CONTENTS

[0008] The utility model discloses a purpose provides a kind of foundation pit fat groove quick backfill and change bracing structure, to solve the personnel cost of high in foundation pit fat groove change bracing plate belt construction, there are security risks in narrow area construction, there are quality hidden dangers in waterproof construction, backfill process is greatly influenced by weather, ground subsidence caused by backfill soil ramming quality is difficult to guarantee etc.

[0009] To realize above-mentioned purpose, the utility model uses following technical scheme: the utility model provides a kind of foundation pit fat groove quick backfill and change bracing structure, including support pile and foundation pit, the bottom of support pile is below the bottom surface of foundation pit, the top end of support pile is provided with crown beam, the top surface of crown beam is flush with ground, the inner side of crown beam is provided with inner support;The bottom surface of foundation pit is provided with cushion layer, the upper end surface of cushion layer is provided with bottom plate, and the power belt is arranged between bottom plate and support pile, the side of the upper end surface of bottom plate close to support pile is provided with structural outer wall, and the inner side of structural outer wall is provided with structural top plate;The fat groove between structural outer wall and support pile is filled with flow state solidified soil, and the top surface of flow state solidified soil is provided with change bracing plate belt, and the upper end surface and the lower end surface of change bracing plate belt are flush with the upper end surface and the lower end surface of structural top plate respectively;The inside of flow state solidified soil is provided with settlement assembly, and the settlement assembly includes settlement pipe and layered settlement magnetic ring.

[0010] Preferably, the settlement pipe is vertically arranged in the fat groove, the bottom end of the settlement pipe is arranged on the upper end surface of the power belt, the top end of the settlement pipe extends upward and is flush with the ground, and the layered settlement magnetic ring is arranged at intervals on the outer side of the settlement pipe below the change bracing plate belt and in contact with the flow state solidified soil.

[0011] Preferably, the settlement assembly further includes a layered settlement instrument and a sensor.

[0012] Preferably, the layered settlement instrument is arranged on the ground, the sensor is arranged in the settlement pipe, and the layered settlement instrument and the sensor are electrically connected by wires.

[0013] Preferably, the layered settlement magnetic ring includes a ring portion and a leg, the ring portion is sleeved on the outer side of the settlement pipe, and the leg is arranged at intervals on the outer side of the ring portion.

[0014] Preferably, the cushion layer, the power belt, and the change bracing plate belt are made of plain concrete, and the crown beam, the support pile, the bottom plate, the structural outer wall, the structural top plate, and the inner support are made of reinforced concrete.

[0015] Preferably, the ring portion is made of plastic material and internally provided with a magnetic material, and the leg is made of steel and fixedly connected to the ring portion by bolts.

[0016] The utility model has the beneficial effects of:

[0017] 1) The utility model provides a kind of quick backfilling and support replacement structure of foundation pit fat groove, using flow state solidified soil backfilling in the fat groove between support pile and structure outer wall, directly backfilling fat groove once, while backfilling soil density meets specification requirement, change traditional stratified tamping construction technology, reduce the investment of construction site earthwork tamping equipment, and construction is not affected by weather, effectively prevent ground subsidence, ensure the construction quality of backfilling soil and main structure, improve the efficiency of on-site construction simultaneously;

[0018] 2) The utility model provides a kind of quick backfilling and support replacement structure of foundation pit fat groove, after support replacement plate band is completed after flow state solidified soil backfilling, plain concrete can be directly poured on the surface of flow state solidified soil, once pouring forming, change the mode that traditional priority sets up formwork frame body to carry out support replacement plate band construction again and leave gap to carry out fat groove backfilling soil construction, not only save manpower and construction period cost, while effectively guaranteeing construction safety in narrow area to carry out support replacement plate band construction;

[0019] 3) The utility model provides a kind of quick backfilling and support replacement structure of foundation pit fat groove, support replacement plate band is located between support pile and structure outer wall, structure top plate does not need to overhang outer wall and support replacement plate band to carry out steel bar connection, not only effectively solve the waterproof problem of structure outer wall, can also be well adhered to structure outer wall, guarantee the safe realization of support replacement working condition, and guarantee the construction quality of main structure;

[0020] 4) The utility model provides a kind of quick backfilling and support replacement structure of foundation pit fat groove, contain settlement tube, stratified settlement magnetic ring, sensor and stratified settlement instrument, bury settlement tube and stratified settlement magnetic ring before fat groove backfilling, and by sensor moving in settlement tube, the earthwork settlement of elevation corresponding stratified settlement magnetic ring can be measured in real time, for earthwork settlement monitoring and early warning, effectively prevent uneven settlement that building occurs after fat groove backfilling, effectively reduce building quality hidden danger.

[0021] Other features and advantages of the present utility model will be set forth in the subsequent description, and part becomes apparent from the description, or is understood by implementing the present utility model. The main purpose and other advantages of the present utility model can be realized and obtained by the scheme specially pointed out in the description. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further explained in detail in combination with the drawings.

[0023] Figure 1 It is the structure schematic diagram of the utility model.

[0024] Figure 2 It is the position relation diagram of settlement tube, stratified settlement magnetic ring and sensor of the utility model.

[0025] Figure 3 is a structural schematic view of the layered settlement magnetic ring.

[0026] The drawing reference: 1 - support pile, 2 - crown beam, 3 - inner support, 4 - cushion layer, 5 - bottom plate, 6 - structural outer wall, 7 - structural top plate, 8 - flow state solidified soil, 9 - support plate belt, 11 - force transmission belt, 101 - settlement pipe, 102 - layered settlement magnetic ring, 1021 - ring part, 1022 - leg, 103 - layered settlement instrument, 104 - sensor. DETAILED DESCRIPTION

[0027] The technical scheme of the utility model is explained in detail by the following examples, the following examples are only exemplary, can only be used to explain and illustrate the technical scheme of the utility model, and can not be explained as the limitation of the technical scheme of the utility model.

[0028] Referring to Figures 1-2 The utility model provides a kind of foundation pit quick backfilling and support replacement structure, including support pile 1 and foundation pit, the bottom of support pile 1 is below foundation pit bottom surface, the top end of support pile 1 is provided with crown beam 2, the top surface of crown beam 2 is flush with ground, the inner side of crown beam 2 is provided with inner support 3;The bottom surface of foundation pit is provided with cushion layer 4, the upper end surface of cushion layer 4 is provided with bottom plate 5, force transmission belt 11 is arranged between bottom plate 5 and support pile 1, the side of bottom plate 5 close to support pile 1 is provided with structural outer wall 6 on the upper end surface, the inner side of structural outer wall 6 is provided with structural top plate 7;

[0029] Flow state solidified soil 8 is filled in the fertilizer groove between structural outer wall 6 and support pile 1, the top surface of flow state solidified soil 8 is provided with support plate belt 9, the upper end surface and the lower end surface of support plate belt 9 are flush with the upper end surface and the lower end surface of structural top plate 7 respectively;Flow state solidified soil 8 is provided with settlement assembly in the inside, and settlement assembly includes settlement pipe 101, layered settlement magnetic ring 102, also includes layered settlement instrument 103 and sensor 104;Settlement pipe 101 is vertically arranged in fertilizer groove, the bottom end of settlement pipe 101 is arranged on the upper end surface of force transmission belt 11, and the top end is stretched out upwards and flush with ground;Layered settlement magnetic ring 102 is arranged at the outer side of settlement pipe 101 below support plate belt 9 and contacts with flow state solidified soil 8;Layered settlement instrument 103 is arranged on ground, and sensor 104 is arranged in settlement pipe 101, when sensor 104 passes through the elevation of layered settlement magnetic ring 102, can send electric signal, for monitoring the earthwork settlement amount at this position;Layered settlement instrument 103 and sensor 104 are electrically connected by wire, and layered settlement instrument 103 is used to receive the electric signal sent by sensor 104 and store data.

[0030] Referring to Figure 3The layered settlement magnetic ring 102 comprises a ring part 1021 and legs 1022, the ring part 1021 is sleeved on the outer side of the settlement pipe 101, and the legs 1022 are arranged at three equal positions on the outer side of the ring part 1021 and are used for stably fixing the flow solidified soil 8 at the corresponding elevation; wherein the ring part 1021 is made of plastic material, the inner part of the ring part 1021 is provided with magnetic material to form a magnetic ring; the legs 1022 are made of steel material, and the legs 1022 and the ring part 1021 are fixedly connected through bolts.

[0031] Further, the cushion layer 4, the force transmission belt 11 and the support replacement plate belt 9 are all made of plain concrete; the crown beam 2, the support pile 1, the bottom plate 5, the structural outer wall 6, the structural top plate 7 and the inner support 3 are all made of reinforced concrete; and the flow solidified soil 8 is made of the original soil excavated from a foundation pit, solidified agent and water added in a certain proportion and fully mixed.

[0032] Further, the working principle of the utility model is as follows: firstly, the settlement pipe 101 is buried in the fertilizer groove in advance, the sensor 104 is located in the settlement pipe 101 and is connected with the layered settlement instrument 103; then the fertilizer groove is backfilled with the flow solidified soil 8, and the layered settlement magnetic ring 102 is vertically and equidistantly arranged on the surface of the settlement pipe 101 in the process of backfilling the fertilizer groove, and is stably fixed on the surface of the flow solidified soil 8 through the legs 1022; when the fertilizer groove is backfilled to the bottom elevation of the structural floor slab, the support replacement plate belt 9 is poured and formed on the top of the flow solidified soil 8, one end of the support replacement plate belt 9 is poured to the surface of the structural outer wall 6, and the other end is poured to the surface of the support pile 1, the bottom elevation of the support replacement plate belt 9 is the bottom elevation of the structural top plate 7, and the top elevation of the support replacement plate belt 9 is the top elevation of the structural top plate 7; at this time, the support pile 1, the support replacement plate belt 9 and the structural floor slab form an effective force transmission system, which is a prerequisite for the removal of the inner support 3; after the backfilling of the fertilizer groove to the main structure is completed, the sensor 104 in the settlement pipe 101 emits an electric signal when passing through the layered settlement magnetic ring 102 at different elevations, so that the soil settlement amount in the fertilizer groove is monitored in real time, and the data is stored in the layered settlement instrument 103, thereby ensuring the construction safety of the main structure.

[0033] The above merely describes a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any change or replacement conceived by any person skilled in the art within the technical range disclosed by the utility model should be covered in the protection scope of the utility model.

Claims

1. A rapid backfill and support replacement structure for a foundation pit fertilizer tank, characterized by: It comprises a supporting pile (1) and a foundation pit, wherein the bottom of the supporting pile (1) is located below the bottom surface of the foundation pit, a crown beam (2) is provided at the top of the supporting pile (1), the top surface of the crown beam (2) is flush with the ground, and an inner support (3) is provided on the inner side surface of the crown beam (2); A cushion layer (4) is provided on the bottom surface of the foundation pit, a bottom plate (5) is provided on the upper end surface of the cushion layer (4), a force transmission belt (11) is provided between the bottom plate (5) and the support pile (1), a structural outer wall (6) is provided on the side of the upper end surface of the bottom plate (5) close to the support pile (1), and a structural top plate (7) is provided on the inner side of the structural outer wall (6); A fertilizing trough between the structural outer wall (6) and the supporting piles (1) is filled with fluidized solidified soil (8), a support plate belt (9) is provided on the top surface of the fluidized solidified soil (8), and the upper end surface and the lower end surface of the support plate belt (9) are respectively flush with the upper end surface and the lower end surface of the structural top plate (7); a settlement component is provided inside the fluidized solidified soil (8), and the settlement component includes a settlement pipe (101) and a layered settlement magnetic ring (102).

2. A rapid backfill and support replacement structure for a foundation pit fertilizer tank as claimed in claim 1, characterized in that: The sedimentation pipe (101) is vertically arranged in the fertilizer trough, the bottom end of the sedimentation pipe (101) is arranged on the upper end surface of the force transmission belt (11), and the top end extends upward and is flush with the ground; the layered sedimentation magnetic rings (102) are arranged at intervals on the outer side surface of the sedimentation pipe (101) below the support plate belt (9) and in contact with the fluidized solidified soil (8).

3. A rapid backfill and support replacement structure for a foundation pit fertilizer tank as claimed in claim 2, characterized in that: The sedimentation assembly further includes a stratified sedimentation meter (103) and a sensor (104).

4. A rapid backfill and support replacement structure for a foundation pit fertilizer tank as claimed in claim 3, characterized in that: The stratified sedimentation meter (103) is arranged on the ground, the sensor (104) is arranged in the sedimentation tube (101), and the stratified sedimentation meter (103) and the sensor (104) are electrically connected via an electric wire.

5. A rapid backfill and support replacement structure for a foundation pit fertilizer tank as claimed in claim 2, characterized in that: The layered sedimentation magnetic ring (102) comprises a ring portion (1021) and supporting legs (1022), wherein the ring portion (1021) is sleeved on the outer side surface of the sedimentation tube (101), and the supporting legs (1022) are arranged at equal intervals on the outer side surface of the ring portion (1021).

6. A rapid backfill and support replacement structure for a foundation pit fertilizer tank as claimed in claim 1, characterized in that: The cushion layer (4), the force transmission belt (11) and the support plate replacement belt (9) are all made of plain concrete; the crown beam (2), the support pile (1), the bottom plate (5), the structural outer wall (6), the structural top plate (7) and the inner support (3) are all made of reinforced concrete.

7. A rapid backfill and support replacement structure for a foundation pit fertilizer tank as claimed in claim 5, characterized in that: The ring portion (1021) is made of plastic material and has magnetic material arranged inside; the legs (1022) are made of steel, and the legs (1022) and the ring portion (1021) are fixedly connected by bolts.

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