JP2002115260A - Extension method for basement - Google Patents

Extension method for basement

Info

Publication number
JP2002115260A
JP2002115260A JP2000310751A JP2000310751A JP2002115260A JP 2002115260 A JP2002115260 A JP 2002115260A JP 2000310751 A JP2000310751 A JP 2000310751A JP 2000310751 A JP2000310751 A JP 2000310751A JP 2002115260 A JP2002115260 A JP 2002115260A
Authority
JP
Japan
Prior art keywords
pile
foundation
underground
basement
floor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2000310751A
Other languages
Japanese (ja)
Inventor
Yutaka Katsura
豊 桂
Katsuyuki Tamaoki
克之 玉置
Miharu Asaka
美治 浅香
Original Assignee
Shimizu Corp
清水建設株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimizu Corp, 清水建設株式会社 filed Critical Shimizu Corp
Priority to JP2000310751A priority Critical patent/JP2002115260A/en
Publication of JP2002115260A publication Critical patent/JP2002115260A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a method for enabling the inexpensive short-term extension of a basement while reducing the generation of noise, vibration, dust, concrete fragments, etc. SOLUTION: In a pile foundation-type structure, a cut-off earth retaining wall 7 is formed under an underground exterior wall 1, which is the remainder of an existing building, an earth retaining pile inserting hole is dug from the inside of the exterior wall 1 in the footing beam 3A of a batholith 3 and the wall 7 so as to install an earth retaining pile 8, and the existing building is supported by a plurality of foundation piles 9. When a bottom surface 6 to be excavated is located in a relatively shallow position, most of the batholith 3 except the section of the footing beam 3A, which is supported by the foundation piles 9, is demolished for removal. Excavation is carried out from the demolished and removed section to as deep a position as the bottom surface 6 for he purpose of enlarging an underground space (When the bottom surface 6 is located in a deep position, the pile 8 is supported by timbering), wherein a new batholith 5, a second-basement floor 4 comprising the footing beam 3A and a new underground external wall 1A disposed inside the pile 8 are constructed, and the unnecessary foundation piles 9 are removed so as to extend a third basement.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、既設建築物の下
に地下階を増築する方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for expanding a basement floor under an existing building.

【0002】[0002]

【従来の技術】地価が高い都心部などの市街地では、建
物を建替える際に地上階の増築に加えて地下階も増築し
たいと希望する人が近年増加している。このような要求
に対しては、従来は既設の地下階は全て解体撤去し、一
旦土砂などで埋め戻して更地にしたのち、新たに山留め
壁を構築し、切梁など支保工を用いた掘削、地下構造躯
体の構築と云った手順で施工していた。
2. Description of the Related Art In urban areas such as city centers where land prices are high, the number of people who wish to expand the basement floor in addition to the ground floor when rebuilding a building has increased in recent years. In response to such demands, all existing basement floors were conventionally dismantled and removed, backfilled with earth and sand, etc., and vacant land was rebuilt. Excavation and construction of the underground structure were carried out in the same procedure.

【0003】[0003]

【発明が解決しようとする課題】しかし、上記従来の施
工方法では、既設地下階を解体する際に騒音・振動・
粉塵が発生する、既設地下階の解体に伴って産業廃棄
物(コンクリートがら)が発生する、すぐに掘り返す
ことになる埋め戻し土の手配・転圧・締固めなどの工事
が必要となり、費用の増大と工期の大幅な延びが避けら
れない、既設地下階の解体に伴う原位置地盤の撹乱に
より土圧が増加する、などと云った問題点があったの
で、これら問題点を解決する必要があった。
However, according to the above-mentioned conventional construction method, noise, vibration, and noise are generated when the existing basement floor is dismantled.
Dust is generated, industrial waste (concrete waste) is generated due to the dismantling of the existing basement floor, and construction work such as arranging, compacting, compacting, etc. of backfill soil that will be dug up immediately is required. There were problems such as an increase in the construction period and a significant increase in the construction period, and an increase in earth pressure due to disturbance of the in-situ ground due to the demolition of the existing basement floor. there were.

【0004】[0004]

【課題を解決するための手段】この発明は上記従来技術
の問題点を解決するためになされたもので、第1の発明
は、既設建築物の地下外壁の下に止水性を備えた山留め
壁を形成し、その山留め壁の内部または山留め壁より内
側の部位に山留め杭を配設し、既設建築物が杭基礎を備
えているときにはその基礎杭と連結された基礎梁部分を
除く底盤部を解体撤去し、既設建築物が基礎杭を備えな
い直接基礎のときには仮基礎杭を打設した後その仮基礎
杭の部分を除く底盤部を解体撤去し、撤去した底盤部位
から掘削して地下階増築空間を形成し、その部分に地下
階を増築することを特徴とする地下階増築方法である。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a first invention is a mountain retaining wall provided with a waterproof property below an underground outer wall of an existing building. Forming a pile, and arranging a pile on the inside of the retaining wall or inside the retaining wall, and when the existing building has a pile foundation, remove the bottom except for the foundation beam connected to the foundation pile. Demolition and removal, when the existing building is a direct foundation without foundation piles, cast a temporary foundation pile, dismantle and remove the bottom except for the temporary foundation pile, excavate from the removed bottom part, and basement floor This is a basement floor extension method characterized by forming an extension space and adding a basement floor to that part.

【0005】第2の発明は、前記第1の発明において掘
削を、山留め杭を支保工により支持して行うようにした
ことを特徴とする地下階増築方法である。
According to a second aspect of the present invention, there is provided a method of extending an underground floor according to the first aspect, wherein the excavation is carried out by supporting a pile retaining pile with a support.

【0006】[0006]

【発明の実施の形態】以下、この発明の実施形態を図面
に基づいて詳細に説明する。なお、この場合は図6に示
したように、地下2階の下に地下3階部分を増築する例
である。
Embodiments of the present invention will be described below in detail with reference to the drawings. In this case, as shown in FIG. 6, this is an example in which a third basement is added below a second basement.

【0007】〔第1の実施形態〕本発明の第1の実施形
態を図1〜図4に基づいて説明する。この第1の実施形
態の地下階増築方法は、地上階を取り壊した既設建築物
の地下階(例えば地下2階)の下にさらに比較的天井の
低い地下階を増築するときに有効な増築方法である。
[First Embodiment] A first embodiment of the present invention will be described with reference to FIGS. The underground floor extension method according to the first embodiment is effective when an underground floor having a relatively low ceiling is further extended below the underground floor (for example, the second basement floor) of an existing building whose top floor has been demolished. It is.

【0008】図1(B)などに示したように、既設建築
物の残した地下外壁1の下に止水性を備えた山留め壁7
を形成する。この山留め壁7は、地下外壁1それ自体
に、または地下外壁1の外側などに適宜の間隔(例え
ば、_m間隔)で開設する、地下外壁1下端の深さの図
示しない改良剤注入穴から、例えば高圧ジェットグラウ
トなどの工法によりセメントやモルタルなどの地盤改良
剤(硬化剤)を掘削予定底面6より深い位置まで注入
し、それを硬化させて地下外壁1の下に、地下外壁1よ
り幅広く形成する。なお、前記地盤改良剤は、後工程で
挿入設置する、例えばH型鋼からなる山留め杭8の下端
より深い部分は、その幅を狭めて注入しても良い。
As shown in FIG. 1 (B) and the like, a mountain retaining wall 7 having waterproofness is provided under the underground outer wall 1 left by the existing building.
To form The mountain retaining wall 7 is formed at an appropriate interval (for example, _m interval) on the underground outer wall 1 itself or on the outside of the underground outer wall 1 from an improving agent injection hole (not shown) having a depth at the lower end of the underground outer wall 1. For example, a ground improvement agent (hardening agent) such as cement or mortar is injected to a position deeper than the planned bottom 6 to be excavated by a method such as high-pressure jet grout, and is hardened to form below the underground outer wall 1 and wider than the underground outer wall 1. I do. The ground improvement agent may be inserted and installed in a later step, for example, at a portion deeper than the lower end of the mountain retaining pile 8 made of H-shaped steel, the width thereof may be narrowed and injected.

【0009】そして、地下外壁1のすぐ内側から既設建
築物の底盤3の基礎梁3Aと、その下側に硬化形成した
山留め壁7とに掘削予定底面6を超える深さの山留め杭
挿入穴を掘り、そこに例えばH形鋼からなる山留め杭8
を挿入設置し、隙間に図示しないソイルモルタルを充填
して山留め杭8を山留め壁7に固着させる。
[0009] Then, from just inside the underground outer wall 1, a pier pile insertion hole having a depth exceeding the planned excavation bottom surface 6 is formed in the foundation beam 3A of the bottom 3 of the existing building and the reinforced wall 7 formed below the foundation beam 3A. Digging, there is a retaining pile 8 made of, for example, H-section steel
And the gap is filled with soil mortar (not shown) to fix the mountain retaining pile 8 to the mountain retaining wall 7.

【0010】なお、山留め杭8と基礎梁3との連結は、
例えば図4に示したようにして行われる。
[0010] The connection between the retaining pile 8 and the foundation beam 3 is as follows.
For example, this is performed as shown in FIG.

【0011】増築する既設建築物が複数の基礎杭9によ
り支持された杭基礎式構造物であり、且つ、掘削予定底
面6が比較的浅いときには、基礎杭9に支持されている
基礎梁3Aの部分を残して底盤3の大部分を解体撤去
し、その部分から掘削予定底面6の深さまですぐさま掘
削して地下空間を広げ、そこに従来と同様の手法を用い
て新たに底盤5と、基礎梁3Aを含む地下2階床4と、
H形鋼製の山留め杭8の内側に配置する新設地下外壁1
Aとを構築すると共に、不要な基礎杭9を撤去して地下
3階を増築する(図2参照)。
When the existing building to be added is a pile foundation type structure supported by a plurality of foundation piles 9 and the planned bottom 6 to be excavated is relatively shallow, the foundation beam 3A supported by the foundation piles 9 is formed. Most of the bottom 3 is dismantled and removed, leaving the part, and the underground space is expanded by immediately excavating from that part to the depth of the bottom 6 to be excavated. A second basement floor 4 including beams 3A,
New underground outer wall 1 placed inside H-shaped steel retaining pile 8
In addition to building A, unnecessary foundation piles 9 are removed and the third basement floor is expanded (see FIG. 2).

【0012】また、増築する既設建築物が基礎杭9によ
り支持されていない直接基礎式構造物であり、且つ、掘
削予定底面6が比較的浅いときには、図3に示したよう
に複数の仮基礎杭9Aを打設した後、仮基礎杭A9に支
持されている基礎梁3Aの部分を残して底盤3の大部分
を解体撤去し、その部分から掘削予定底面6の深さまで
すぐさま掘削して地下空間を広げ、そこに前記図2と同
様に新たに底盤5と、基礎梁3Aを含む地下2階床4
と、新設地下外壁1Aとを構築して地下3階を増築する
(山留め杭8は、この場合は山留め壁7のすぐ内側に設
けられている)。
Further, when the existing building to be added is a direct foundation type structure which is not supported by the foundation pile 9 and the bottom surface 6 to be excavated is relatively shallow, as shown in FIG. After placing the pile 9A, most of the bottom plate 3 is dismantled and removed, excluding the portion of the foundation beam 3A supported by the temporary foundation pile A9, and excavation is immediately performed from the portion to the depth of the planned bottom 6 to be excavated. The space is expanded, and a bottom plate 5 and a second basement floor 4 including a foundation beam 3A are newly added thereto as in FIG.
And a new underground outer wall 1A to build a third basement floor (the retaining pile 8 is provided immediately inside the retaining wall 7 in this case).

【0013】〔第2の実施形態〕本発明の第2の実施形
態を図5に基づいて説明する。この第2の実施形態の地
下階増築方法は、地上階を取り壊した既設建築物の地下
階(例えば地下2階)の下にさらに天井の高い地下階を
増築するときに有効な増築方法である。
[Second Embodiment] A second embodiment of the present invention will be described with reference to FIG. The basement floor extension method according to the second embodiment is an effective extension method when an underground floor with an even higher ceiling is added below the basement floor (for example, the second basement floor) of an existing building whose top floor has been demolished. .

【0014】地下2階の下に天井の高い地下3階を増築
するときには、掘削予定底面6の位置が深くなり、した
がって山留め杭8は掘削により露出する部分の長さが長
くなって撓み易くなるので、山留め壁7のすぐ内側に設
けた山留め杭8を例えば図5(A)に示したように地下
2階床4から吊り下げたリング支保工10により支持補
強しながら掘削する、図5(B)に示したように斜め切
梁11により支持補強しながら掘削する、図5(C)に
示したようにアイランド工法の切梁12により支持補強
しながら掘削する、などして山留め杭8が施工時に地下
室側に撓まないようにする。
When the third basement floor with a high ceiling is added below the second basement floor, the position of the bottom surface 6 to be excavated is deepened, so that the excavation pile 8 has a longer portion exposed by excavation and is easily bent. Therefore, as shown in FIG. 5 (A), for example, as shown in FIG. 5 (A), a pier pile 8 provided immediately inside the pier wall 7 is excavated while being supported and reinforced by a ring supporter 10 suspended from the second basement floor 4. As shown in FIG. 5B, the excavation is performed while being supported and reinforced by the diagonally cut beam 11, and as shown in FIG. 5C, the excavation is performed while being supported and reinforced by the cut beam 12 of the island construction method. Do not bend to the basement side during construction.

【0015】前記図5などのように山留め杭8を支持補
強して掘削した後、仮基礎杭9A(あるいは基礎9)に
支持されている基礎梁3Aの部分を残して底盤3の大部
分を解体撤去し、その部分から掘削予定底面6の深さま
で掘削して地下空間を広げ、そこに従来と同様の手法を
用いて底盤5と、基礎梁3Aを含む地下2階床4と、山
留め杭8の内側に配置する新設地下外壁1Aとを構築す
ると共に、不要な仮基礎杭9A(または基礎杭9)を撤
去して地下3階を増築する(図2参照)。
As shown in FIG. 5 and the like, after excavation while supporting and reinforcing the pile retaining pile 8, most of the bottom plate 3 is removed except for the portion of the foundation beam 3A supported by the temporary foundation pile 9A (or the foundation 9). Demolition and removal, excavation from that part to the depth of the planned bottom 6 to expand the underground space, using the same method as in the past, the base 5, the second basement floor 4 including the foundation beam 3A, and the pile retaining pile In addition to constructing a new underground outer wall 1A to be disposed inside the base 8 and removing unnecessary temporary foundation piles 9A (or foundation piles 9), the third basement floor is expanded (see FIG. 2).

【0016】なお、本発明は上記実施形態に限定される
ものではないので、特許請求の範囲に記載の趣旨から逸
脱しない範囲で各種の変形実施が可能である。
Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the present invention.

【0017】例えば、揚水井戸(穴)を設けて地下水を
汲み上げ、地下水位を掘削予定底面6より下げて掘削を
行うようにしても良い。また、この地下水の汲み上げ
は、地盤改良剤を地盤に注入する前に行っても良いし、
山留め杭8を設置した後で行うようにしても良い。
For example, a pumping well (hole) may be provided to pump up the groundwater, and the groundwater level may be lowered below the planned bottom surface 6 for drilling. Also, this pumping of groundwater may be performed before injecting the soil conditioner into the ground,
It may be performed after the mountain retaining pile 8 is installed.

【0018】また、地下水を既存の基礎梁位置まで低下
させた後、既存の床の一部を解体し、既存床下の地盤を
水中掘削することも可能である。水中掘削した後、底盤
コンクリートを打設し、その後地下水を底盤コンクリー
ト位置まで低下させて地下室を作ると、切梁などの支保
工は不要で掘削が可能となる。
After the groundwater is lowered to the existing foundation beam position, a part of the existing floor can be dismantled and the ground under the existing floor can be excavated underwater. After excavation in water, concrete is poured into the bottom, and then the groundwater is lowered to the level of the concrete in the basement to create a basement.

【0019】[0019]

【発明の効果】以上説明したように、本発明は既設建築
物の地下階の大部分を残して地下階を増築する方法であ
るので、既設地下階を全て解体して一旦埋め戻し、その
後に地下階を構築する従来工法に比べ、騒音・振動・
粉塵の発生が少ない、産業廃棄物(コンクリートが
ら)の発生量が少ない、埋め戻し土の手配・転圧・締
固めなどの工事が不要となり、費用の大幅な削減と工期
の大幅な短縮が図れる、原位置地盤の撹乱に伴う土圧
の増加が少ない、などと云った顕著な効果がある。
As described above, the present invention is a method of expanding an underground floor while leaving most of the underground floor of an existing building. Compared to the conventional method of constructing the basement floor, noise, vibration,
Low dust generation, low generation of industrial waste (concrete waste), no need to arrange backfill soil, compaction, compaction, etc., greatly reducing costs and shortening the construction period There is a remarkable effect that the increase of the earth pressure due to the disturbance of the in-situ ground is small.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 第1の実施形態を示す説明図であり、(A)
は平面図、(B)は断面図である。
FIG. 1 is an explanatory view showing a first embodiment, and FIG.
Is a plan view, and (B) is a sectional view.

【図2】 第1の実施形態により増築した地下階を示す
説明図である。
FIG. 2 is an explanatory diagram showing a basement floor added according to the first embodiment.

【図3】 第1の実施形態において仮基礎杭を使用して
増築するときの説明図である。
FIG. 3 is an explanatory diagram when an extension is performed using a temporary foundation pile in the first embodiment.

【図4】 第1の実施形態における基礎梁と山留め杭と
の連結要領を示す説明図である。
FIG. 4 is an explanatory diagram showing a connection point between a foundation beam and a retaining pile according to the first embodiment.

【図5】 第2の実施形態を示す説明図であり、(A)
は山留め杭をリング支保杭により支持した説明図、
(B)は山留め杭を斜め切梁により支持した説明図、
(C)は山留め杭をアイランド工法の切梁により支持し
た説明図である。
FIG. 5 is an explanatory view showing a second embodiment, and FIG.
Is an illustration in which the retaining pile is supported by a ring support pile,
(B) is an explanatory view in which the retaining pile is supported by diagonally cut beams,
(C) is an explanatory view in which the mountain retaining pile is supported by the cut beam of the island construction method.

【図6】 増築の概要を示す説明図である。FIG. 6 is an explanatory diagram showing an outline of an extension.

【符号の説明】[Explanation of symbols]

1 (既設)地下外壁 1A (新設)地下外壁 2 (既設)地下1階床 3 (既設)底盤 3A 基礎梁 4 (新設)地下2階床 5 (新設)底盤 6 掘削予定底面 7 山留め壁 8 山留め杭 9 基礎杭 9A 仮基礎杭 10 リング支保工 11 斜め切梁 12 アイランド工法の切梁 Reference Signs List 1 (existing) underground outer wall 1A (new) underground outer wall 2 (existing) 1st floor underground 3 (existing) bottom 3A foundation beam 4 (new) 2nd floor underground 5 (new) bottom 6 Excavated bottom 7 mountain retaining wall 8 retaining Pile 9 Foundation pile 9A Temporary foundation pile 10 Ring support 11 Diagonally cut beam 12 Cut beam of island method

───────────────────────────────────────────────────── フロントページの続き (72)発明者 浅香 美治 東京都港区芝浦一丁目2番3号 清水建設 株式会社内 Fターム(参考) 2D047 AA01 AB08 2E176 AA01 AA07 BB32 BB36  ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Miji Asaka 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2D047 AA01 AB08 2E176 AA01 AA07 BB32 BB36

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 既設建築物の地下外壁の下に止水性を備
えた山留め壁を形成し、その山留め壁の内部または山留
め壁より内側の部位に山留め杭を配設し、既設建築物が
杭基礎を備えているときにはその基礎杭と連結された基
礎梁部分を除く底盤部を解体撤去し、既設建築物が基礎
杭を備えない直接基礎のときには仮基礎杭を打設した後
その仮基礎杭の部分を除く底盤部を解体撤去し、撤去し
た底盤部位から掘削して地下階増築空間を形成し、その
部分に地下階を増築することを特徴とする地下階増築方
法。
1. A mountain retaining wall having waterproofness is formed below an underground outer wall of an existing building, and a mountain retaining pile is disposed inside the mountain retaining wall or at a portion inside the mountain retaining wall. When the foundation is provided, the bottom excluding the foundation beam connected to the foundation pile is dismantled and removed, and when the existing building is a direct foundation without foundation pile, the temporary foundation pile is cast and then A basement floor extension method characterized by dismantling and removing the bottom part except for the above-mentioned part, excavating from the removed bottom part part to form an underground floor extension space, and adding an underground floor to that part.
【請求項2】 底盤部を解体撤去した後、山留め杭を支
保工により支持して掘削を行うことを特徴とする請求項
1記載の地下階増築方法。
2. The method according to claim 1, wherein the excavation is carried out by supporting the pile retaining pile with a support after the bottom portion is dismantled and removed.
JP2000310751A 2000-10-11 2000-10-11 Extension method for basement Pending JP2002115260A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005002675A (en) * 2003-06-12 2005-01-06 Shimizu Corp Method of evaluating timbering performance of composite earth retaining wall
CN102444142A (en) * 2011-09-20 2012-05-09 新世纪建设集团有限公司 Pile group column replacement expanded basement and construction method of same
CN103233477A (en) * 2013-04-25 2013-08-07 温州天然工程勘察有限公司 Method for pouring open type reinforced concrete support and baseboard floor in deep foundation pit supporting engineering
JP2013174049A (en) * 2012-02-23 2013-09-05 Taisei Corp Extension method for earth retaining wall and earth retaining wall structure
CN108301635A (en) * 2016-07-26 2018-07-20 朱奎 The Basement reconstruction structure of bored pile foundation
CN108331154A (en) * 2016-07-26 2018-07-27 朱奎 Basement reconstruction construction method with raft foundation building
CN110273432A (en) * 2019-06-13 2019-09-24 广州穗岩土木科技股份有限公司 A kind of existing main structure of subway station enlarging construction method
CN110616738A (en) * 2019-09-12 2019-12-27 上海建工集团股份有限公司 Underground space vertical building construction method and structure
CN112813983A (en) * 2020-12-31 2021-05-18 长江勘测规划设计研究有限责任公司 Cantilever beam-column system implemented synchronously with pit depth in pit and construction method
CN113718796A (en) * 2021-09-30 2021-11-30 山东大学 Underground structure system with foundation pit supporting function and construction method

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005002675A (en) * 2003-06-12 2005-01-06 Shimizu Corp Method of evaluating timbering performance of composite earth retaining wall
CN102444142A (en) * 2011-09-20 2012-05-09 新世纪建设集团有限公司 Pile group column replacement expanded basement and construction method of same
CN102444142B (en) * 2011-09-20 2014-01-15 新世纪建设集团有限公司 Pile group column replacement expanded basement and construction method of same
JP2013174049A (en) * 2012-02-23 2013-09-05 Taisei Corp Extension method for earth retaining wall and earth retaining wall structure
CN103233477A (en) * 2013-04-25 2013-08-07 温州天然工程勘察有限公司 Method for pouring open type reinforced concrete support and baseboard floor in deep foundation pit supporting engineering
CN108331367A (en) * 2016-07-26 2018-07-27 朱奎 The Basement reconstruction structure of raft foundation
CN108331154A (en) * 2016-07-26 2018-07-27 朱奎 Basement reconstruction construction method with raft foundation building
CN108301635A (en) * 2016-07-26 2018-07-20 朱奎 The Basement reconstruction structure of bored pile foundation
CN108360561A (en) * 2016-07-26 2018-08-03 朱奎 The Basement reconstruction of raft foundation constructs
CN108360553A (en) * 2016-07-26 2018-08-03 朱奎 The construction method of Basement reconstruction construction with raft foundation building
CN110273432A (en) * 2019-06-13 2019-09-24 广州穗岩土木科技股份有限公司 A kind of existing main structure of subway station enlarging construction method
CN110616738A (en) * 2019-09-12 2019-12-27 上海建工集团股份有限公司 Underground space vertical building construction method and structure
CN112813983A (en) * 2020-12-31 2021-05-18 长江勘测规划设计研究有限责任公司 Cantilever beam-column system implemented synchronously with pit depth in pit and construction method
CN113718796A (en) * 2021-09-30 2021-11-30 山东大学 Underground structure system with foundation pit supporting function and construction method

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