技术领域technical field
本发明涉及土建，水利等技术领域，尤其适用于软土边坡地基处理。The invention relates to technical fields such as civil engineering and water conservancy, and is especially suitable for treating soft soil slope foundations.
背景技术Background technique
水泥搅拌桩在处理软土地基的工程中较为常见，应用十分广泛。它是通过特制的搅拌桩机将水泥等固化剂与地基土强制就地搅拌形成水泥土桩，用于加固软弱地基，增强边坡的抗滑动能力。Cement mixing piles are common and widely used in projects dealing with soft soil foundations. It uses a special mixing pile machine to forcibly mix cement and other curing agents with foundation soil on the spot to form cement-soil piles, which are used to strengthen weak foundations and enhance the sliding resistance of slopes.
但是，在水泥搅拌桩的设计中，必须充分考虑桩和地基土的承载能力，使工程设计和工程造价方面都趋于合理。目前边坡加固采用的水泥搅拌桩多是梅花形布置。在梅花形布置水泥搅拌桩中，每根桩都是孤立的，桩与桩之间没有相互作用，产生不了结构效应，类似于”豆腐插针”的情形。因此，在加固软土边坡时，梅花形布置的水泥搅拌桩地基仍然容易产生较大的水平变形。However, in the design of cement mixing piles, the bearing capacity of piles and foundation soil must be fully considered, so that the engineering design and engineering cost tend to be reasonable. At present, the cement mixing piles used for slope reinforcement are mostly arranged in a plum blossom shape. In the quincunx arrangement of cement mixing piles, each pile is isolated, there is no interaction between the piles, and no structural effect can be produced, which is similar to the situation of "tofu with needles". Therefore, when the soft soil slope is reinforced, the cement mixing pile foundation arranged in a quincunx shape is still prone to large horizontal deformation.
鉴于以上原因，有必要在相同置换率的情况下，创新水泥搅拌桩的布置形式，增加桩与桩之间相互作用，以减小所加固软弱土的变形。In view of the above reasons, it is necessary to innovate the layout of cement mixing piles and increase the interaction between piles to reduce the deformation of the reinforced weak soil under the same replacement rate.
发明内容Contents of the invention
本发明所要解决的技术问题是针对水泥搅拌桩梅花形布置的的不足，提出一种新型的水泥搅拌桩布置形式，从而更加有利于软土边坡的稳定。The technical problem to be solved by the present invention is to propose a new arrangement form of cement mixing piles for the deficiency of the quincunx-shaped arrangement of cement mixing piles, which is more conducive to the stability of soft soil slopes.
本发明用如下技术方案：The present invention uses following technical scheme:
一种用于边坡加固的水泥搅拌桩结构，其特征在于：包括第一连续墙、第二连续墙以及第三连续墙，所述的第一连续墙为水泥搅拌桩连续墙，且第一连续墙沿边坡走向间隔设置；所述的第二连续墙也为水泥搅拌桩连续墙，该第二连续墙设置在两相邻的第一连续墙之间，所述的第二连续墙形状为拱形且拱凸向坡顶；所述的第三连续墙为旋喷桩连续墙，该旋喷桩连续墙设置在边坡的坡底且与所述的第一连续墙下端连接成一个整体。A cement mixing pile structure for slope reinforcement, characterized in that it includes a first continuous wall, a second continuous wall and a third continuous wall, the first continuous wall is a cement mixing pile continuous wall, and the first Diaphragm walls are arranged at intervals along the direction of the slope; the second diaphragm wall is also a cement mixing pile diaphragm wall, and the second diaphragm wall is arranged between two adjacent first diaphragm walls. The shape of the second diaphragm wall is Arched and arched to the top of the slope; the third continuous wall is a continuous wall of rotary grouting piles, which is arranged at the bottom of the slope and connected with the lower end of the first continuous wall as a whole .
本发明沿边坡走向的第一水泥搅拌桩连续墙、第二拱形水泥搅拌桩连续墙（横向）和第三高强度旋喷桩连续墙（横向）之间相互连接形成结构。使用这种水泥搅拌桩布置形式能够解决现有地基处理中梅花形布桩的“豆腐插针”的情形，特别在流塑状态的地基中效果更加明显。According to the present invention, the first cement mixing pile continuous wall, the second arched cement mixing pile continuous wall (horizontal direction) and the third high-strength jet grouting pile continuous wall (horizontal direction) are connected to each other to form a structure. The use of this arrangement of cement mixing piles can solve the situation of "tofu pins" in the existing foundation treatment, especially in the foundation of the fluid plastic state.
与现有的技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
1.在本发明水泥搅拌桩布置中，第一连续墙、第二连续墙和第三连续墙三者有机连接成一个整体，软弱土被封闭在第一连续墙和第二连续墙形成的结构中，从而有效地减小了土体的沿坡向的变形。1. In the cement mixing pile arrangement of the present invention, the first continuous wall, the second continuous wall and the third continuous wall are organically connected as a whole, and the weak soil is enclosed in the structure formed by the first continuous wall and the second continuous wall In this way, the deformation of the soil along the slope direction is effectively reduced.
2.由于第二连续墙拱形的存在，使连续墙之间形成相互挤压作用，土体的沿坡向的变形力直接作用在第二连续墙的拱形上，然后传递到第一连续墙上，又因为第一连续墙下端为第三旋喷桩连续墙，所以形成了一个整体受力，更加有利于整个加固结构的安全。2. Due to the existence of the arch of the second continuous wall, mutual extrusion is formed between the continuous walls, and the deformation force of the soil along the slope directly acts on the arch of the second continuous wall, and then is transmitted to the first continuous wall. On the wall, because the lower end of the first continuous wall is the third continuous wall of rotary grouting piles, it forms an overall force bearing, which is more conducive to the safety of the entire reinforced structure.
3.软土地基作用在水泥搅拌桩上的力，通过水泥搅拌桩形成的结构传递到高压旋喷桩上，更加有利于发挥高压旋喷桩作用，也有利于安全控制。3. The force of the soft soil foundation acting on the cement mixing pile is transmitted to the high-pressure rotary grouting pile through the structure formed by the cement mixing pile, which is more conducive to the function of the high-pressure rotary grouting pile and is also conducive to safety control.
附图说明Description of drawings
图1是本发明边坡加固结构布置示意图。Figure 1 is a schematic diagram of the layout of the slope reinforcement structure of the present invention.
图2是本发明加固结构透视图。Fig. 2 is a perspective view of the reinforcing structure of the present invention.
其中：1、第一连续墙，2、第二连续墙，3、第三连续墙，4、坡底面，5、坡顶面。Among them: 1. The first continuous wall, 2. The second continuous wall, 3. The third continuous wall, 4. The bottom surface of the slope, 5. The top surface of the slope.
具体实施方式detailed description
下面结合附图，对本发明作详细说明：Below in conjunction with accompanying drawing, the present invention is described in detail:
如图1所示，本发明边坡加固的搅拌桩结构，包括水泥搅拌桩第一连续墙1和水泥搅拌桩第二连续墙2，其中第一连续墙1沿着坡面走向由坡顶向坡底施工，在相邻两第一连续墙1之间施工第二连续墙2，其中第二连续墙2的形状为拱形，拱形的拱凸向坡顶，第二连续墙2的拱高以及第一连续墙1之间的间距，根据具体边坡地质条件进行设计。在第一连续墙1的下端采用第三连续墙3即旋喷桩连续墙连接，使第一连续墙、第二连续墙及第三连续墙成为一个有机的整体。As shown in Fig. 1, the mixing pile structure of the slope reinforcement of the present invention comprises the first continuous wall 1 of the cement mixing pile and the second continuous wall 2 of the cement mixing pile, wherein the first continuous wall 1 moves along the direction of the slope from the top to the top of the slope. The bottom of the slope is constructed, and the second continuous wall 2 is constructed between two adjacent first continuous walls 1, wherein the shape of the second continuous wall 2 is arched, and the arch of the arch is convex to the top of the slope, and the arch of the second continuous wall 2 The height and the spacing between the first continuous walls 1 are designed according to the specific geological conditions of the slope. The lower end of the first continuous wall 1 is connected by the third continuous wall 3 , that is, the continuous wall of the jet grouting pile, so that the first continuous wall, the second continuous wall and the third continuous wall become an organic whole.
本发明第二连续墙，根据设计的拱形桩的形状进行测量放样定出每个拱形桩的桩位，用插竹片板、地面用油漆画圈定位的方法。The second continuous wall of the present invention, carries out measurement lofting according to the shape of the designed arched piles and determines the pile position of each arched piles, uses the method of inserting bamboo sheet boards, and drawing circles with paint on the ground for positioning.
按照放样的的桩位进行施工，水泥搅拌桩施工如下：The construction is carried out according to the pile position of the stakeout, and the construction of the cement mixing pile is as follows:
（1）搅拌桩定位后实施第一次搅拌下沉；(1) After the stirring pile is positioned, implement the first stirring and sinking;
（2）提升搅拌机，边搅拌，变喷浆；(2) Lift the mixer, while stirring, change to spray;
（3）实施第二次搅拌下沉；(3) Implement the second stirring and sinking;
（4）重新提升搅拌机，边搅拌，变喷浆；(4) Re-elevate the mixer, while stirring, change to spray;
（5）搅拌成桩。(5) Stir into piles.
桩位定位要准确，使得施工形成的桩相互连接呈拱形，随施工的进展，随时复核桩位位置，以防桩位发生偏移或者桩体出现倾斜，造成桩与桩之间不连续，使每个桩相互并排相连，形成连续的水泥搅拌桩连续墙。下图为这种加固方法形成结构的一部分。The positioning of the pile positions should be accurate, so that the piles formed by the construction are connected to each other in an arched shape. As the construction progresses, the pile positions should be checked at any time to prevent the pile positions from shifting or the pile body from tilting, resulting in discontinuity between the piles. Each pile is connected side by side with each other to form a continuous continuous wall of cement mixing piles. The image below shows part of a structure formed by this reinforcement method.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210477683.0ACN102912805B (en) | 2012-11-22 | 2012-11-22 | For the cement mixing pilework of slope reinforcement |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210477683.0ACN102912805B (en) | 2012-11-22 | 2012-11-22 | For the cement mixing pilework of slope reinforcement |
| Publication Number | Publication Date |
|---|---|
| CN102912805A CN102912805A (en) | 2013-02-06 |
| CN102912805Btrue CN102912805B (en) | 2016-02-03 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210477683.0AExpired - Fee RelatedCN102912805B (en) | 2012-11-22 | 2012-11-22 | For the cement mixing pilework of slope reinforcement |
| Country | Link |
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| CN (1) | CN102912805B (en) |
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| CN112627204A (en)* | 2020-12-28 | 2021-04-09 | 中水北方勘测设计研究有限责任公司 | Reinforcing structure of unstable side slope and construction method thereof |
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| CN2466217Y (en)* | 2000-03-20 | 2001-12-19 | 彭高培 | Combined top bracing self-supporting supporting structure |
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| CN102444133A (en)* | 2011-09-20 | 2012-05-09 | 河海大学 | Soil cement long wall continuous arch structure for slope reinforcement |
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| 搅拌桩长墙连拱联合梅花形布置在复合地基加固中的应用;吴俊等;《治淮》;20120831(第8期);全文* |
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| CN102912805A (en) | 2013-02-06 |
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