CN211873033U

CN211873033U - Pit supporting construction of underground works

Info

Publication number: CN211873033U
Application number: CN202020356093.2U
Authority: CN
Inventors: 林奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-11-06
Anticipated expiration: 2030-03-20

Abstract

The utility model relates to a pit supporting construction of underground works, including the pit, the bottom surface sets up the horizontal plate form in advance and supports in the pit, and the week side is arranged in the pit and is provided with a plurality of vertical fender piles, and a plurality of fender pile tops are through enclosing the purlin and ally oneself with into holistic bearing structure. This underground works's pit supporting construction's simple structure, structure safety and stability has not only overcome traditional excavation supporting construction's fender pile length long, need pierce through soft soil layer, and it is big to warp, construction cycle length, process are alternately many etc. not enough, has realized design instrument formula supporting construction moreover, and construction speed is fast, can have enough to meet the need the use many times. The method is suitable for supporting excavation of small-area pits such as underground pit and middle pit, basement elevator shaft, tower crane foundation, pump house, septic tank, underground pipeline and the like, and can realize safe, economic, quick and effective foundation pit supporting.

Description

Pit supporting construction of underground works

Technical Field

The utility model relates to a pit supporting construction of underground works.

Background

Along with the continuous development of urban construction, land resources are reduced day by day, the requirements for developing and utilizing urban underground spaces are more and more urgent, and various underground civil and public facilities such as subways, underground stations, underground parking garages, underground shopping malls, underground pump houses, underground sewage treatment plants, underground pipelines and the like, underground civil defense works and the like are more and more. The development of underground engineering causes that the foundation pit is constructed under various complicated hydrological, geological and environmental conditions. Excavation of foundation pit engineering sometimes causes damage to the surrounding environment, engineering piles in the pit, and underground structures.

Therefore, designing a safe, economical, fast and effective foundation pit supporting structure is an important subject of current underground engineering.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a pit supporting construction of underground works.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a pit supporting construction of underground works, includes the pit, and the bottom surface sets up horizontal plate form in advance and supports in the pit, and the week side is arranged and is provided with a plurality of vertical fender piles in the pit, and a plurality of fender pile tops are through enclosing purlin antithetical couplet become holistic bearing structure.

Preferably, the horizontal plate-shaped support is arranged in advance and is a concrete horizontal plate-shaped support or a mortar horizontal plate-shaped support.

Preferably, the support pile is a tool type support pile or a precast concrete support pile.

Preferably, the supporting structure further comprises a positioning frame located on each edge of the pit, the positioning frame is fixedly connected with the enclosing purlin on the same edge in a threaded manner through a screw and nuts locked at two ends of the screw, and a plurality of supporting piles on the same edge are positioned and fastened between the positioning frame and the enclosing purlin.

Preferably, the bottoms of the plurality of support piles are inserted into the pit bottom.

Preferably, the straight sections of the enclosing purlins are connected by straight welding lines, the corners of the enclosing purlins are connected by oblique welding lines, and reinforcing plates are welded between the corners of the two enclosing purlins.

Compared with the prior art, the utility model discloses following beneficial effect has: this underground works's pit supporting construction's simple structure, structure safety and stability has not only overcome traditional excavation supporting construction's fender pile length long, need pierce through soft soil layer, and it is big to warp, construction cycle length, process are alternately many etc. not enough, has realized design instrument formula supporting construction moreover, and construction speed is fast, can have enough to meet the need the use many times. The method is suitable for supporting excavation of small-area pits such as underground pit and middle pit, basement elevator shaft, tower crane foundation, pump house, septic tank, underground pipeline and the like, and can realize safe, economic, quick and effective foundation pit supporting.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a side view of an embodiment of the present invention.

Fig. 2 is a top view of a tool type support pile connection node.

Fig. 3 is a sectional view a-a of fig. 2.

Fig. 4 is a top view of a precast concrete support pile connection node.

Fig. 5 is a sectional view B-B of fig. 4.

Fig. 6 is a schematic view of the connection between straight sections of purlins.

Fig. 7 is a schematic view of the connection at the corner of a purlin.

Fig. 8 is a first schematic view of the pressure filling of the auger bit.

FIG. 9 is a second schematic view of the pressure filling of the auger bit.

Fig. 10 is a construction flowchart of an embodiment of the present invention.

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1-10, a pit supporting structure of underground engineering comprises a pit 1, wherein a horizontal plate-shaped support 2 is arranged on the bottom surface in advance in the pit, a plurality of vertical supporting piles 3 are arranged on the inner peripheral side of the pit, and the tops of the plurality of supporting piles are connected into an integral supporting structure through a surrounding purlin 4.

In the embodiment of the present invention, the horizontal plate-shaped support is set in advance to be a concrete horizontal plate-shaped support or a mortar horizontal plate-shaped support.

In the embodiment of the present invention, the support pile is a tool type support pile 5 or a precast concrete support pile 6.

The embodiment of the utility model provides an in, bearing structure is still including the locating frame 7 that is located each edge of pit, and the locating frame links firmly through screw rod 8 and locking at the nut at screw rod both ends and enclose purlin looks spiro union with the limit to a plurality of fender pile location fastening on the same limit between locating frame and enclosing purlin.

In the embodiment of the utility model, the bottom of a plurality of fender piles is inserted into the pit bottom.

The embodiment of the utility model provides an in, enclose the straight section of purlin and connect and adopt straight weld 9 between, enclose the corner of purlin and connect and adopt oblique weld 10 to weld reinforcing plate 11 between the turning of two purlins of enclosing.

A construction method of a pit supporting structure of underground engineering is carried out according to the following steps: in the concrete implementation process of the supporting structure, (1) firstly, horizontal plate-shaped support construction is carried out, according to a lofting position, a spiral drill bit modified by an excavator is adopted to drill to about 500mm below the pit bottom, then, metered concrete or mortar is poured into a pipe in the center (valve) of the drill bit through pressure, the drill bit is lifted to the ground through reverse drilling while being rotated to the position of the pit bottom, and the drill bit is lifted to the ground through reverse drilling and moved to the next adjacent hole position for construction until all horizontal plate-shaped support construction is completed; (2) and (3) dismounting the spiral drill bit, replacing the hydraulic vibration hammer, laying the supporting piles and the enclosing purlins, pressing the supporting piles one by one according to the designed pile positions (the pile bottom is generally controlled to be deeper than the supporting bottom of the horizontal sheet pile by 500 mm), and reliably connecting the supporting piles and the enclosing purlins to complete the construction of the whole pit supporting structure. The defects that the traditional foundation pit supporting structure is long in supporting pile length, needs to penetrate through a soft soil layer, is large in deformation, long in construction period, multiple in process intersection and the like are overcome, the shaping tool type supporting structure is realized, the construction speed is high, and the supporting pile can be recycled for multiple times; the pit bottom adopts a spiral drilling tool to construct full horizontal plate-shaped concrete (or mortar) advance support, so that the rigidity is high and the deformation is small; the miniaturized equipment is suitable for construction in the pit; the construction cost is saved, and the construction risk is reduced. The support is suitable for excavation of small-area pits such as underground room pits, underground elevator shafts, tower crane foundations, pump rooms, septic tanks and underground pipelines, and can realize safe, economic, rapid and effective foundation pit support. The length of the supporting pile penetrating through the soft soil layer is greatly shortened, a shaped section steel (or precast concrete) tool type (recoverable) supporting structure is realized, green construction is realized, convenience and rapidness are realized, and the manufacturing cost is saved; the pit bottom adopts a spiral drilling tool to fill the full horizontal slab concrete (or mortar) advance support, the structure is simple and reasonable, the rigidity is large, and the deformation is small; the construction equipment is miniaturized, the pit is convenient to move, convenience and flexibility are realized, and the influence on the engineering pile is small.

The embodiment of the utility model provides an in, for preventing that adjacent stake intensity is too high to creep into the difficulty and a fender pile inserts the difficulty, concrete or mortar should mix the retarder of certain proportion.

The embodiment of the utility model provides an in, for the fender pile is extracted, should brush the antifriction agent of certain thickness on the fender pile surface for being convenient for, for guaranteeing that the horizontal plate form supports has sufficient intensity, should have abundant maintenance time after the supporting construction is accomplished.

The embodiment of the utility model provides an in, be convenient for the construction of underground structure with accelerate construction speed, also can adopt the precast concrete fender pile that does not retrieve.

The present invention is not limited to the above-described preferred embodiments, and any person can obtain the pit supporting structure of underground works of other various forms by the teaching of the present invention. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a pit supporting construction of underground works which characterized in that: the supporting structure comprises a pit, wherein a horizontal plate-shaped support is arranged on the bottom surface in the pit in advance, a plurality of vertical supporting piles are arranged on the inner peripheral side of the pit, and the tops of the plurality of supporting piles are connected into an integral supporting structure through a surrounding purlin.

2. A pit supporting structure of an underground construction according to claim 1, characterized in that: the horizontal plate-shaped support is arranged in advance and is a concrete horizontal plate-shaped support or a mortar horizontal plate-shaped support.

3. A pit supporting structure of an underground construction according to claim 1, characterized in that: the supporting pile is a tool type supporting pile or a precast concrete supporting pile.

4. A pit supporting structure of an underground construction according to claim 1, characterized in that: the supporting structure also comprises a positioning frame positioned on each side of the pit, the positioning frame is fixedly connected with the enclosing purlin on the same side in a threaded manner through a screw rod and nuts locked at two ends of the screw rod, and a plurality of supporting piles on the same side are positioned and fastened between the positioning frame and the enclosing purlin.

5. A pit supporting structure of an underground construction according to claim 1, characterized in that: the bottoms of a plurality of supporting piles are inserted into the pit bottom.

6. A pit supporting structure of an underground construction according to claim 1, characterized in that: straight welding seams are adopted for connection between straight sections of the enclosing purlins, oblique welding seams are adopted for connection at corners of the enclosing purlins, and reinforcing plates are welded between corners of the two enclosing purlins.