CN115142428B - Advanced construction method for deep foundation pit storage yard - Google Patents
Advanced construction method for deep foundation pit storage yard Download PDFInfo
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- CN115142428B CN115142428B CN202210778542.6A CN202210778542A CN115142428B CN 115142428 B CN115142428 B CN 115142428B CN 202210778542 A CN202210778542 A CN 202210778542A CN 115142428 B CN115142428 B CN 115142428B
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- foundation pit
- storage yard
- underground structure
- deep foundation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a prior construction method of a deep foundation pit storage yard, which is characterized in that when the number of stack bridge plates is insufficient and a storage yard cannot be arranged during deep foundation pit construction, a foundation pit inner platform for supporting the storage yard is formed by pre-constructing a underground structure of the storage yard position, the storage yard is constructed on the foundation pit inner platform, further, the storage yard construction is realized on the premise of not occupying the stack bridge plates of the deep foundation pit, the construction of a basement structure is ensured, the completion of the basement structure in a planned construction period is ensured, and the construction quality of the basement structure is improved. The invention solves the problem that no storage yard is arranged when the number of trestle plates of the deep foundation pit is small, which leads to the construction structure of the underground structure.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a advanced construction method for a deep foundation pit storage yard.
Background
In the existing building construction, reinforced concrete support (multi-channel) +vertical lattice column combined systems are mostly adopted in deep foundation pit projects. The trestle plates serve as the only available planar transportation channels for the basement construction stage, and thus the number of trestle plates determines the horizontal transportation capacity of the construction site. In general, when planning in the earlier stage of projects, construction units often need to 'optimize' the number of trestle plates and the arrangement range of the trestle plates in order to save the cost, and in addition, the available storage yard area of the inner plane of a red line of a construction site is smaller, when the construction scheme generally considers that the trestle plates are taken as pump truck transportation stations and material transportation channels and cannot occupy, the construction stage of an underground structure is free from storage yard availability, the construction period of the underground structure is seriously influenced, and the construction is seriously stopped.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
In order to overcome the defects in the prior art, the prior construction method for the deep foundation pit storage yard is provided, so that the problem that the storage yard is not arranged when the number of trestle plates of the deep foundation pit is small and the underground structure is constructed is solved.
In order to achieve the above purpose, the advanced construction method for the deep foundation pit storage yard comprises the following steps:
determining a storage yard position based on the position of an inner support of a foundation pit and the capacity coverage range of a hoisting machine, so that the storage yard position is free from shielding of the inner support, and the storage yard position is arranged in the capacity coverage range;
excavating earthwork at the storage yard position to form a leading pit before excavating the foundation pit;
constructing a first-stage underground structure at the storage yard position of the deep foundation pit underground structure in the advance pit from bottom to top;
constructing a deep foundation pit storage yard at the top of the primary underground structure at the storage yard position;
and after the deep foundation pit storage yard is constructed, excavating the foundation pit, constructing secondary underground structures at the rest positions of the deep foundation pit, and connecting the secondary underground structures with the primary underground structures to form the deep foundation pit underground structures.
Further, when the step of determining the yard position based on the position of the inner support of the foundation pit and the capacity coverage area of the hoisting machine is implemented, the position of the inner support is determined according to the plan view of the inner support, and an area without shielding of the inner support is selected as the yard position in the capacity coverage area.
Furthermore, a water stop steel plate is arranged in the construction joint between the bottom plate of the first-stage underground structure and the bottom plate of the second-stage underground structure.
Further, a supporting frame is detachably arranged in each layer of the primary underground structure, and the supporting frame is supported between the upper layer structure floor slab and the lower layer structure floor slab of the primary underground structure.
Further, the outer edge of the structural floor slab of the first-stage underground structure is connected with the structural floor slab of the second-stage underground structure, which is opposite in position, through a throwing rib.
Furthermore, the outer edge of the structural floor slab of the top layer of the primary underground structure is provided with a protective railing.
The advanced construction method for the deep foundation pit storage yard has the beneficial effects that when the number of the stack bridge plates is insufficient and the storage yard cannot be set during deep foundation pit construction, the underground structure at the storage yard position is constructed in advance to form the foundation pit inner platform for supporting the storage yard, the storage yard is constructed on the foundation pit inner platform, further, the storage yard construction is realized on the premise of not occupying the stack bridge plates of the deep foundation pit, the guarantee is provided for the construction of the basement structure, the completion of the basement structure in the planned construction period is ensured, and the construction quality of the basement structure is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
fig. 1 is a plan view of a yard location according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an underground structure of a deep foundation pit according to an embodiment of the present invention.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 and 2, the invention provides a advanced construction method for a deep foundation pit storage yard, which comprises the following steps:
s1: and determining a storage yard position A based on the position of the inner support 1 of the foundation pit and the capacity coverage range of the hoisting machine 2, so that no shielding of the inner support 1 exists in the storage yard position A, and the storage yard position A is arranged in the capacity coverage range.
When the step of determining the storage yard position A based on the position of the inner support 1 of the foundation pit and the capacity coverage of the hoisting machine is implemented, the position of the inner support 1 is determined according to the plan view of the inner support 1, and an area without shielding of the inner support 1 is selected as the storage yard position A in the capacity coverage.
Specifically, in combination with design drawings of the enclosure structure and the underground structure of the deep foundation pit, one or more structural areas which are not influenced by the disassembly support are screened out to serve as storage yard positions, then construction is carried out in advance, and a top plate of the underground structure of the deep foundation pit at the storage yard positions serves as a material storage yard of the underground structure construction stage of the deep foundation pit.
The storage yard is arranged in the coverage range of the hoisting machine. In this embodiment, the hoisting machine is a tower crane.
S2: prior to pit excavation, earth is excavated at yard location a to form a leading pit.
And excavating earthwork at the determined storage yard position A to form a leading pit before fully excavating earthwork in the foundation pit.
S3: the first-stage underground structure 31 at the yard position a of the underground structure is constructed from bottom to top in the pit.
Specifically, a water stop steel plate is installed in the construction joint between the bottom plate 311 of the primary underground structure 31 (i.e., the structural floor of the bottom of the primary underground structure) and the bottom plate 321 of the secondary underground structure 32.
A water stop steel plate is installed in the construction joint between the top plate of the primary underground structure 31 (i.e., the structural floor at the top of the primary underground structure) and the bottom plate 321 of the secondary underground structure 32.
The outer edges of the structural floors of the first-stage underground structure 31 are connected with the structural floors of the second-stage underground structure 32 at opposite positions through throwing ribs.
And when the construction joint structure of the first-stage underground structure is constructed, the rib throwing treatment is carried out, so that the outer edge of the later-stage underground structure and the reinforcing steel bars of the second-stage underground structure are conveniently subjected to lap joint construction.
The support frame 5 is removably mounted within each layer of the primary underground structure 31. The support frame 5 is supported between two adjacent floor slabs 311 of the primary underground structure 31.
In this embodiment, the load of the deep foundation pit yard is larger, so the bottom plate to top plate support frame of the first-stage underground structure at the location of the yard is reserved until the construction of the underground structure of the deep foundation pit is completed, and the support frame is removed (the support frame is removed while the concrete strength of the underground structure of the deep foundation pit is required to reach 100% strength).
S4: a deep foundation pit yard is constructed on top of the primary underground structure 31 at yard location a.
In this embodiment, the protective rail 4 is mounted to the outer edge of the structural floor of the top layer of the primary underground structure 31.
Specifically, because the structure of the outer edge of the primary underground structure is not constructed in a longer period, a temporary edge is formed, and each layer of structural floor above the bottom plate of the primary underground structure is required to be erected with a safety protection railing, and a high-grade foot plate with the thickness of 200mm and a safety mesh net are arranged.
S5: after the deep foundation pit yard is constructed, the foundation pit is excavated, the secondary underground structure 32 of the rest position of the deep foundation pit is constructed, and the secondary underground structure 32 is connected with the primary underground structure 31 to form the deep foundation pit underground structure.
According to the advanced construction method for the deep foundation pit storage yard, when the number of the stack bridges is insufficient and the storage yard cannot be set during deep foundation pit construction, the underground structure at the storage yard position is constructed in advance to form the foundation pit inner platform for supporting the storage yard, the storage yard is constructed on the foundation pit inner platform, further, the storage yard construction is realized on the premise that the stack bridges of the deep foundation pit are not occupied, the guarantee is provided for the construction of the basement structure, the completion of the basement structure in the planned construction period is ensured, and the construction quality of the basement structure is improved.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (5)
1. The advanced construction method for the deep foundation pit storage yard is characterized by comprising the following steps of:
determining a storage yard position based on the position of an inner support of a foundation pit and the capacity coverage range of a hoisting machine, so that the storage yard position is free from shielding of the inner support, and the storage yard position is arranged in the capacity coverage range;
excavating earthwork at the storage yard position to form a leading pit before excavating the foundation pit;
constructing a first-stage underground structure at the storage yard position of the deep foundation pit underground structure in the advance pit from bottom to top;
constructing a deep foundation pit storage yard at the top of the primary underground structure at the storage yard position;
after the deep foundation pit storage yard is constructed, excavating the foundation pit, constructing secondary underground structures at the rest positions of the deep foundation pit, and connecting the secondary underground structures with the primary underground structures to form deep foundation pit underground structures;
a supporting frame is detachably arranged in each layer of the primary underground structure, and the supporting frame is supported between two layers of structure floors which are adjacent up and down of the primary underground structure;
and the bottom plate to top plate support frame body of the first-stage underground structure at the storage yard position is reserved until the construction of the deep foundation pit underground structure is completed, and the support frame is removed after the storage yard is converted into another area.
2. The advanced construction method for deep foundation pit storage yard according to claim 1, wherein when the step of determining the storage yard position based on the position of the inner support of the foundation pit and the capacity coverage of the hoisting machine is performed, the position of the inner support is determined according to the plan view of the inner support, and a region without shielding by the inner support is selected as the storage yard position within the capacity coverage.
3. The advanced construction method for deep foundation pit yards according to claim 1, wherein a water stop steel plate is installed in a construction joint between the bottom plate of the primary underground structure and the bottom plate of the secondary underground structure.
4. The advanced construction method of a deep foundation pit yard according to claim 1, wherein the outer edges of the structural floors of the first-stage underground structure are connected to the structural floors of the second-stage underground structure at opposite positions through a swinging rib.
5. The advanced construction method for deep foundation pit storage yard according to claim 4, wherein the outer edge of the structural floor slab of the top layer of the primary underground structure is provided with a guard rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210778542.6A CN115142428B (en) | 2022-06-30 | 2022-06-30 | Advanced construction method for deep foundation pit storage yard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210778542.6A CN115142428B (en) | 2022-06-30 | 2022-06-30 | Advanced construction method for deep foundation pit storage yard |
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| Publication Number | Publication Date |
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| CN115142428A CN115142428A (en) | 2022-10-04 |
| CN115142428B true CN115142428B (en) | 2023-06-09 |
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| CN202210778542.6A Active CN115142428B (en) | 2022-06-30 | 2022-06-30 | Advanced construction method for deep foundation pit storage yard |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10348077A1 (en) * | 2003-10-13 | 2005-05-04 | Manfred Kaul | Road or rail construction method, by driving sheet piles or infill supports into ground, placing support structure on top and excavating soil underneath |
| CN103541364A (en) * | 2013-10-10 | 2014-01-29 | 上海申元岩土工程有限公司 | Design and construction method of large area foundation pit deformation control with roundabout method |
| CN105236275B (en) * | 2015-10-19 | 2017-03-22 | 中建一局集团建设发展有限公司 | Soil lifting system and soil lifting method for building deep foundation pit construction in narrow zone |
| CN208713917U (en) * | 2018-07-03 | 2019-04-09 | 中建二局第三建筑工程有限公司 | A kind of steel structure platform stacked for construction material |
| CN212317427U (en) * | 2020-04-16 | 2021-01-08 | 中建八局华南建设有限公司 | Turnover scaffold yard for slope-setting position at top of foundation pit |
| CN216071390U (en) * | 2021-08-27 | 2022-03-18 | 中国十七冶集团有限公司 | Device is stacked in concentrated of a large amount of pipe truss pole pieces under limited site condition |
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