Supporting structure for reverse construction of deep foundation pit

Abstract

The utility model discloses a support structure for deep foundation pit reverse construction, which comprises a pile plate body, a pouring gate is reserved at the bottom end of the pile plate body, the bottom edge of the pile plate body inclines upwards from outside to inside towards the pouring gate to form a concrete gathering section, and the top edge of the pile plate body is consistent with the bottom line shape of the concrete gathering section; a notch is formed in the position, corresponding to a pouring gate, of the top edge of the pile plate body, a movable plate is arranged in the notch, the movable plate is driven to block the notch or expose the notch, the current construction method can be optimized, the secondary repairing and filling frequency can be reduced, and the construction efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building construction, concretely relates to a support structure for deep foundation pit reverse construction method construction. BACKGROUND

[0002] At present, in the construction process of the building industry, the underground construction of buildings is more and more, and in the case of not affecting the surrounding existing buildings, the land resources within the red line are maximized, so some foundation pit support forms have to be used to meet the above requirements. In the pile plate support structure, the pile baffle has to be constructed by reverse construction method, for this component, the existing construction method causes the quality problem of the construction joint between the new and old pouring to be prominent, and the concrete cannot be poured densely, and almost all of them need to be repaired and filled twice, which not only prolongs the construction period, but also has relatively poor construction quality.

[0003] Therefore, in order to solve the above problems, a support structure for deep foundation pit reverse construction method construction is needed, which can optimize the current construction method, reduce the frequency of secondary repair and filling, and improve the construction efficiency. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims at overcoming the defects in the prior art, providing a support structure for deep foundation pit reverse construction method construction, which can optimize the current construction method, reduce the frequency of secondary repair and filling, and improve the construction efficiency.

[0005] The support structure for deep foundation pit reverse construction method construction of the utility model comprises a pile plate body, a pouring opening is reserved at the bottom end of the pile plate body, the bottom edge of the pile plate body is inclined from outside to inside upwards to form a concrete collecting section towards the pouring opening, and the top edge of the pile plate body is linearly consistent with the bottom of the concrete collecting section.

[0006] Further, the top edge of the pile plate body has an opening corresponding to the pouring opening position, a movable plate is arranged in the opening, and the movable plate is driven to block or expose the opening.

[0007] Further, a plurality of support piles are arranged, and the plurality of support piles are arranged in transverse intervals.

[0008] The pile plate body is a plurality of pieces, each piece of the pile plate body is limited by two adjacent support piles in the transverse direction, so as to form a transverse retaining wall.

[0009] Further, the plurality of pieces of the pile plate body are also connected in the longitudinal direction, so as to form a longitudinal continuous retaining wall in the adjacent two support piles.

[0010] Further, the support piles are fixed to the side wall of the foundation pit through anchor cables, and the anchor cables are inclined downward from outside to inside.

[0011] Further, the anchor cables arranged on each support pile are arranged in a longitudinal direction.

[0012] Further, the formwork support rod assembly comprises a bottom formwork rod and a top formwork rod.

[0013] The front end of the bottom formwork rod is arranged in a detachable hinged manner with the bottom of the pile plate body, and the front end of the top formwork rod is arranged in a detachable hinged manner with the top of the pile plate body.

[0014] The rear end of the bottom formwork rod and the rear end of the top formwork rod are arranged in a hinged manner.

[0015] Further, the formwork support rod assembly further comprises a positioning lock for determining the hinged angle of the bottom formwork rod and the top formwork rod.

[0016] Further, the formwork support rod assembly further comprises a positioning lock for determining the hinged angle of the bottom formwork rod and the top formwork rod.

[0017] The scheme also discloses a deep foundation pit construction method based on the support structure for deep foundation pit top-down construction.

[0018] S1. Fix the support pile at a specified position of the foundation pit through the anchor cable.

[0019] S2. Arrange the pile plate body and arrange a formwork bottom blocking block between the pile plate body and the side wall of the foundation pit.

[0020] S3. Adjust the formwork support rod assembly so that the pile plate body is limited in position.

[0021] S4. Pour concrete in the pouring cavity, and close the movable plate when the concrete overflows from the gap.

[0022] S5. Repeat steps S2-S4 from top to bottom to complete the construction.

[0023] The bottom of the last pile plate body is not provided with a formwork bottom blocking block.

[0024] The support structure for deep foundation pit top-down construction has the advantages that the construction method can effectively avoid the situation that the construction joint is not dense and full, guarantees the concrete construction quality and appearance quality, satisfies the workers to pour in place at one time, improves the construction efficiency of the operators, reduces the quality risk, and achieves the expected purpose. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be further described in connection with the drawings and embodiments:

[0026] Figure 1 is a structural schematic view of the utility model;

[0027] Figure 2 is a structural schematic view of the utility model Figure 1 is a structural schematic view of the A-A direction of the utility model;

[0028] Figure 3 is a structural schematic view of the pile plate body of the utility model;

[0029] Figure 4 is a structural schematic view of the B-B direction of the utility model Figure 3 . DETAILED DESCRIPTION

[0030] Figure 1 is a structural schematic view of the utility model, as shown in the figure, the support structure for deep foundation pit top-down construction in the embodiment includes pile plate body 1, the bottom end of the pile plate body 1 is reserved pouring port 11, the bottom edge of the pile plate body 1 is inclined from outside to inside upwards to the pouring port 11, so that the bottom of the pile plate body forms a concrete collecting section.

[0031] As shown in the figure, the pile plate body 1 of the present scheme is a rectangular plate, the middle part of the bottom edge of the pile plate body 1 is concave upwards in a rectangular shape, and the two ends of the bottom edge of the pile plate body 1 located on both sides of the rectangular concave are connected to the bottom of the concave profile from outside to inside obliquely upwards, so that the bottom edge of the pile plate body 1 forms a downward flared cone, the bottom profile of the concrete collecting section is similar to a funnel shape, and in actual use, the concrete is poured at this place, and when the concrete fills from bottom to top, it will automatically fill the measuring groove formed by the concrete collecting section, which can effectively avoid the situation that the construction joint is not dense and not full, ensure the concrete construction quality and appearance quality, satisfy the workers to pour in place at one time, improve the construction efficiency of the operator, reduce the quality risk, so that the expected purpose is achieved;

[0032] And in this scheme, because the need for reverse construction method, the need for more pieces of pile plate body 1 in the vertical direction of the stack, so the top edge of the pile plate body 1 described in this scheme and the bottom of the linearly consistent with the pouring section; So that the two pieces of pile plate body 1 in the height direction of the splice can be completely matched, improve the quality of pouring; Further, the top edge of the pile plate body 1 has a notch corresponding to the pouring position 11, the notch is provided with a movable plate 12, the movable plate 12 is driven to block the notch or expose the notch; The notch and the movable plate 12 corresponding to the notch and the top edge of the profile are consistent with the bottom of the pouring section, which can make the next level of pile plate body 1 and the upper level of pile plate body 1 completely fit, and only at the pouring position 11 form a controllable opening and closing notch for pouring concrete, which can make the pouring quality better and the pouring difficulty lower; The movable plate 12 in this scheme is provided at the notch in the form of pulling, and the outer side is provided with a handle and a latch for locking. When the concrete overflows from the notch, it means that the groove formed by the pouring section is filled with concrete, which can be blocked by the movable plate 12 and locked by the latch.

[0033] In this embodiment, a plurality of support piles 2 are also included, and the plurality of support piles 2 are arranged in a transverse direction at intervals.

[0034] The pile plate body 1 is a plurality of pieces, and each of the pile plate bodies 1 is limited by two adjacent support piles 2 in the transverse direction, so as to form a retaining wall in the transverse direction. Since the construction method is reverse, the construction is carried out layer by layer from top to bottom, and the top edges of the pile plate bodies 1 in the top layer are flush, and a corbel 3 is arranged on the upper part.

[0035] In this embodiment, a plurality of pieces of the pile plate body 1 are also connected in the longitudinal direction, so that a continuous retaining wall is formed in the longitudinal direction in the adjacent two support piles 2. During construction, the support piles 2 are arranged first, and then the retaining wall is constructed layer by layer from top to bottom. The adjacent pile plate bodies 1 in the longitudinal direction are engaged with each other, so that the retaining wall in the longitudinal direction is continuous and has better quality.

[0036] In this embodiment, the support piles 2 are fixed to the side wall of the foundation pit by anchor cables 4, and the anchor cables 4 are inclined downward from outside to inside. Each support pile 2 is provided with a plurality of anchor cables 4 arranged in the longitudinal direction. The support capacity of the support pile 2 is improved to ensure the effective construction of the pile plate body 1.

[0037] In this embodiment, a formwork support rod assembly is also included, and the formwork support rod assembly includes a bottom formwork rod 5 and a top formwork rod 6.

[0038] The front end of the bottom formwork rod 5 is detachably hingedly arranged with the bottom of the pile plate body 1, and the front end of the top formwork rod 6 is detachably hingedly arranged with the top of the pile plate body 1.

[0039] The rear end of the bottom formwork support rod 5 and the rear end of the top formwork support rod 6 are hingedly arranged;

[0040] The formwork support rod assembly further comprises a positioning lock 7 for determining the hinged angle of the bottom formwork support rod 5 and the top formwork support rod 6.

[0041] As shown in the figure, the formwork support rod assembly is formed by two rear-end hinged telescopic rods, and a positioning lock 7 is arranged at the end of the hinged telescopic rod to ensure the formwork angle and stability, that is, the locking position of the positioning lock 7 is arranged on the pin shaft hingedly connecting the two telescopic rods and the end of the two telescopic rods, and the pin hole is arranged circumferentially around the pin shaft, thereby ensuring the locking of the positioning lock 7 on the rear end of the two telescopic rods, and the front end of the two telescopic rods is hingedly connected to the pile plate body 1 and forms a triangular stable support structure with the pile plate body 1. The present scheme discards the traditional formwork structure and utilizes the adjustability of the telescopic rod to adapt to any formwork space, especially the situation of narrow space difficult to formwork, which can be solved and the position reliability of the pile plate body 1 can be improved.

[0042] The formwork support rod assembly of the present scheme is two groups, and the two groups of formwork support rod assemblies are respectively arranged on the transverse sides of the pouring port to improve the pouring quality.

[0043] In the embodiment, a mold bottom blocking block 8 is further included, and a pouring cavity is formed between the pile plate body 1 and the side wall of the foundation pit, and the mold bottom blocking block 8 is controlled to close the bottom of the pouring cavity. The mold bottom blocking block 8 can improve the pouring quality.

[0044] The present scheme further discloses a deep foundation pit construction method based on the support structure for the deep foundation pit top-down construction method, which comprises the following construction steps:

[0045] S1. The support pile 2 is fixed at a specified position of the foundation pit by the anchor cable 4;

[0046] S2. The pile plate body 1 is arranged, and the mold bottom blocking block 8 is arranged between the pile plate body 1 and the side wall of the foundation pit;

[0047] S3. The formwork support rod assembly is adjusted to limit the position of the pile plate body 1;

[0048] S4. The concrete is poured in the pouring cavity, and the movable plate 12 is closed when the concrete overflows from the gap;

[0049] S5. The steps S2-S4 are repeated from top to bottom to complete the construction;

[0050] The bottom of the last pile plate body 1 is not provided with the mold bottom blocking block 8.

[0051] The construction method can effectively avoid the non-dense and non-full pouring at the construction joint, guarantees the concrete construction quality and appearance quality, meets the one-time pouring of workers, improves the construction efficiency of workers, reduces the quality risk, and achieves the expected purpose.

[0052] Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application. They should all be included in the scope of the claims of the present application.

Claims

1. A support structure for deep foundation pit top-down construction, characterized in that: The pile plate body is provided with a pouring opening at the bottom end, and the bottom edge of the pile plate body is inclined outward and upward toward the pouring opening from the inside to the outside, so that the bottom of the pile plate body forms a concrete collecting section, and the top edge of the pile plate body is linearly consistent with the bottom of the concrete collecting section; the top edge of the pile plate body is provided with an opening corresponding to the pouring opening position, and a movable plate is arranged in the opening, and the movable plate is driven to block or expose the opening.

2. The support structure for deep excavation top-down construction according to claim 1, characterized in that: A plurality of supporting piles are further included, and the plurality of supporting piles are arranged in a transverse direction. The pile plate body is in a plurality of pieces, and each piece of the pile plate body is limited by two adjacent supporting piles in a transverse direction, so as to form a retaining wall in the transverse direction.

3. The support structure for the topdown construction of deep foundation pits according to claim 2, characterized in that: The plurality of pieces of the pile plate body are further connected in a longitudinal direction, so as to form a continuous retaining wall in the longitudinal direction between the two adjacent supporting piles.

4. The support structure for deep excavation top-down construction method according to claim 3, characterized in that: The supporting piles are fixed to the side wall of the foundation pit by anchor cables, and the anchor cables are inclined downward from the outside to the inside.

5. The support structure for deep excavation top-down construction method according to claim 4, characterized in that: The anchor cables arranged on each supporting pile are arranged in a longitudinal direction.

6. The support structure for deep excavation top-down construction method according to claim 1, characterized in that: A formwork support rod assembly is further included, and the formwork support rod assembly includes a bottom formwork rod and a top formwork rod. The front end of the bottom formwork rod is detachably hingedly arranged at the bottom of the pile plate body, and the front end of the top formwork rod is detachably hingedly arranged at the top of the pile plate body. The rear end of the bottom formwork rod and the rear end of the top formwork rod are hingedly arranged.

7. The support structure for deep excavation top-down construction method according to claim 6, characterized in that: The formwork support rod assembly further includes a positioning lock, and the positioning lock is used to determine the hinged angle of the bottom formwork rod and the top formwork rod.

8. The support structure for deep excavation top-down construction method according to claim 1, characterized in that: A formwork bottom blocking block is further included, a pouring cavity is formed between the pile plate body and the side wall of the foundation pit, and the formwork bottom blocking block is controlled to close the bottom of the pouring cavity.

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